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() { var innerMenu = document.getElementById('fixed-menubar-inner'); var items = innerMenu.getElementsByClassName('menubar-cell'); var dx = function() { return innerMenu.getBoundingClientRect().width - window.innerWidth;}; for (let i = items.length - 1; i >= 0 && dx() >= 0; i--) { items[i].classList.add("no-menu-text"); } }()); } catch (e) { console.error(e) } try { navmenu.init(); } catch (e) {} </script> <style type='text/css'> div.entry-content p:first-child:first-letter { float:left; font-size:3em; margin-right:.06em; line-height:90%; } p.bigletter:first-letter { float:left; font-size:3.8em; margin-right:.06em; line-height:90%; } </style> <div class='h1section'><h1><div id='h1header1' style='padding:2px;padding:5px 0;font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;;'>About the World Air Quality Index project</div><div id='h1header2' class='h1sub'>aqicn.org - waqi.info</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { 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.fluidcolumn-right { width: 100%; border: none; padding-left: 0px; } .fluidcontent { margin: 0px; } } </style> <div class='fluidcontent'> <div class='fluidcolumn-left'> <div style='text-align:left;'> <div style='float:right;padding:5px 10px;'><img src='/images/logo/regular.png' style='height:80px'></div> <p> The World Air Quality Index project began in 2007, 18 years ago. Its core mission is to foster air pollution awareness by providing a unified, worldwide and real-time air quality information. </p> <p> The project is now providing transparent air quality information for hundreds of countries, covering more than 500,000 air quality monitoring stations, via those two websites: <a href='https://aqicn.org'>aqicn.org</a> and <a href='https://waqi.info'>waqi.info</a>. </p> <center style='margin:20px;'><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" version="1" viewBox="0 0 26 26" enable-background="new 0 0 26 26"><path fill="#888" d="M 15.65625 -0.03125 C 14.280846 -0.03760636 12.828752 0.09254274 11.3125 0.40625 C 8.28651 1.0323169 5.7746616 2.1709106 3.96875 3.59375 C 2.3885774 4.8387345 1.3097647 6.3321654 1.0625 7.96875 A 1.0001 1.0001 0 0 0 1 8.40625 C 1 8.4709766 0.99753847 8.5296394 1 8.59375 C 0.99939321 8.6245955 1 8.6565744 1 8.6875 C 1.0067678 8.8049913 1.0164368 8.9159604 1.03125 9.03125 C 1.0536237 9.2185949 1.1014372 9.4156735 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21.90625 4.5625 A 1.0001 1.0001 0 0 0 21.9375 4.625 C 22.12047 5.4788616 21.54154 6.6735055 20 7.875 C 18.45846 9.0764945 16.081299 10.145895 13.3125 10.71875 C 10.546306 11.291066 7.7660826 11.269646 5.8125 10.78125 C 4.8357087 10.537052 4.0847823 10.157122 3.625 9.78125 C 3.3682882 9.5713881 3.1893221 9.3858538 3.09375 9.1875 C 3.0413411 8.9743851 3.0082478 8.7545393 3 8.53125 C 3.0633474 7.4789308 3.7648202 6.2771492 5.1875 5.15625 C 6.6815884 3.9790894 8.91349 2.9489331 11.6875 2.375 C 13.071248 2.0887073 14.428529 1.9626064 15.65625 1.96875 z M 15.96875 3.65625 C 14.93792 3.617106 13.843984 3.69192 12.71875 3.90625 A 1.0001 1.0001 0 0 0 12.6875 3.9375 C 9.8940815 4.582135 7.6159262 5.8506824 6.5625 7.5625 A 1.0001 1.0001 0 1 0 8.25 8.625 C 8.7942179 7.740646 10.701734 6.434394 13.09375 5.875 C 13.10453 5.87295 13.11421 5.87702 13.125 5.875 C 15.064267 5.5112859 17.031887 5.6468794 18.03125 6.03125 A 1.0040202 1.0040202 0 0 0 18.75 4.15625 C 17.952461 3.8495042 16.99958 3.6953943 15.96875 3.65625 z M 9.15625 17.59375 A 1.0001 1.0001 0 0 0 8.5625 19.25 C 8.5625 19.25 11.033033 22.015963 15.53125 21.90625 A 1.0004882 1.0004882 0 1 0 15.46875 19.90625 C 11.766967 19.996537 10.0625 17.9375 10.0625 17.9375 A 1.0001 1.0001 0 0 0 9.15625 17.59375 z M 8.125 20.1875 A 1.0001 1.0001 0 0 0 7.40625 21.65625 C 7.40625 21.65625 8.6869767 23.974979 11.65625 24.09375 A 1.001098 1.001098 0 0 0 11.75 22.09375 C 9.7192733 22.012521 9.1875 20.75 9.1875 20.75 A 1.0001 1.0001 0 0 0 8.21875 20.1875 A 1.0001 1.0001 0 0 0 8.125 20.1875 z M 7.59375 23.0625 A 1.0001 1.0001 0 0 0 7.4375 23.09375 A 1.0001 1.0001 0 0 0 6.9375 23.34375 C 6.9375 23.34375 6.19375 24 5.09375 24 A 1.0001 1.0001 0 1 0 5.09375 26 C 6.99375 26 8.28125 24.84375 8.28125 24.84375 A 1.0001 1.0001 0 0 0 7.59375 23.0625 z" color="#000" ></path></svg></center> <p> The founding team is composed of several contributors in the domain of environmental sciences, data science, system engineering, HW and UI design. </p> <p> The team has been expanding worldwide, with new key supporters from China, Singapore, India, Australia, USA and many countries in Europe. </p> <center style='margin:20px;'><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" version="1" viewBox="0 0 26 26" enable-background="new 0 0 26 26"><path fill="#888" d="M 15.65625 -0.03125 C 14.280846 -0.03760636 12.828752 0.09254274 11.3125 0.40625 C 8.28651 1.0323169 5.7746616 2.1709106 3.96875 3.59375 C 2.3885774 4.8387345 1.3097647 6.3321654 1.0625 7.96875 A 1.0001 1.0001 0 0 0 1 8.40625 C 1 8.4709766 0.99753847 8.5296394 1 8.59375 C 0.99939321 8.6245955 1 8.6565744 1 8.6875 C 1.0067678 8.8049913 1.0164368 8.9159604 1.03125 9.03125 C 1.0536237 9.2185949 1.1014372 9.4156735 1.15625 9.59375 C 1.4590854 10.826485 2.2046296 11.91918 3.21875 12.78125 C 4.0779092 13.511593 5.1369309 14.083861 6.3125 14.53125 A 1.0001 1.0001 0 0 0 6.53125 14.9375 C 8.1339345 16.910035 12.101162 19.118434 18.1875 18.59375 A 1.0043849 1.0043849 0 0 0 18 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17.59375 z M 8.125 20.1875 A 1.0001 1.0001 0 0 0 7.40625 21.65625 C 7.40625 21.65625 8.6869767 23.974979 11.65625 24.09375 A 1.001098 1.001098 0 0 0 11.75 22.09375 C 9.7192733 22.012521 9.1875 20.75 9.1875 20.75 A 1.0001 1.0001 0 0 0 8.21875 20.1875 A 1.0001 1.0001 0 0 0 8.125 20.1875 z M 7.59375 23.0625 A 1.0001 1.0001 0 0 0 7.4375 23.09375 A 1.0001 1.0001 0 0 0 6.9375 23.34375 C 6.9375 23.34375 6.19375 24 5.09375 24 A 1.0001 1.0001 0 1 0 5.09375 26 C 6.99375 26 8.28125 24.84375 8.28125 24.84375 A 1.0001 1.0001 0 0 0 7.59375 23.0625 z" color="#000" ></path></svg></center> <p> The project is a social enterprise, and, despite its extensive outreach, it has never received any donations or grant. </p> <p> The income, coming from online advertising as well as the <a href='/gaia/'>GAIA</a> air quality monitoring stations, is used to cover the cloud hosting cost. </p> </div> </div> <div class='fluidcolumn-right'> <p> The project is constantly looking for support from more contributors. </p> <p > It has now received active contributions from more than 16281 citizens from 138 countries </p> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/flag-icon-css/3.2.1/css/flag-icon.min.css" /> <div title='United Arab Emirates' class='sprite-ispritflags sprite-ispritflags-ae flag-icon flag-icon-ae' style='display:inline-block;vertical-align:middle;'></div> <div title='Afghanistan' class='sprite-ispritflags sprite-ispritflags-af flag-icon flag-icon-af' style='display:inline-block;vertical-align:middle;'></div> <div title='Albania' class='sprite-ispritflags sprite-ispritflags-al flag-icon flag-icon-al' style='display:inline-block;vertical-align:middle;'></div> <div title='Armenia' class='sprite-ispritflags sprite-ispritflags-am flag-icon flag-icon-am' style='display:inline-block;vertical-align:middle;'></div> <div title='Angola' class='sprite-ispritflags sprite-ispritflags-ao flag-icon flag-icon-ao' style='display:inline-block;vertical-align:middle;'></div> <div title='Argentina' class='sprite-ispritflags sprite-ispritflags-ar flag-icon flag-icon-ar' style='display:inline-block;vertical-align:middle;'></div> <div title='Austria' class='sprite-ispritflags sprite-ispritflags-at flag-icon flag-icon-at' style='display:inline-block;vertical-align:middle;'></div> <div title='Australia' class='sprite-ispritflags sprite-ispritflags-au flag-icon flag-icon-au' style='display:inline-block;vertical-align:middle;'></div> <div title='Aruba' class='sprite-ispritflags sprite-ispritflags-aw flag-icon flag-icon-aw' style='display:inline-block;vertical-align:middle;'></div> <div title='Azerbaijan' class='sprite-ispritflags sprite-ispritflags-az flag-icon flag-icon-az' style='display:inline-block;vertical-align:middle;'></div> <div title='Bosnia and Herzegovina' class='sprite-ispritflags sprite-ispritflags-ba flag-icon flag-icon-ba' style='display:inline-block;vertical-align:middle;'></div> <div title='Bangladesh' class='sprite-ispritflags sprite-ispritflags-bd flag-icon flag-icon-bd' style='display:inline-block;vertical-align:middle;'></div> <div title='Belgium' class='sprite-ispritflags sprite-ispritflags-be flag-icon flag-icon-be' style='display:inline-block;vertical-align:middle;'></div> <div title='Bulgaria' class='sprite-ispritflags sprite-ispritflags-bg flag-icon flag-icon-bg' style='display:inline-block;vertical-align:middle;'></div> <div title='Bahrain' class='sprite-ispritflags sprite-ispritflags-bh flag-icon flag-icon-bh' style='display:inline-block;vertical-align:middle;'></div> <div title='Brunei' class='sprite-ispritflags sprite-ispritflags-bn flag-icon flag-icon-bn' style='display:inline-block;vertical-align:middle;'></div> <div title='Bolivia' class='sprite-ispritflags sprite-ispritflags-bo flag-icon flag-icon-bo' style='display:inline-block;vertical-align:middle;'></div> <div title='Brazil' class='sprite-ispritflags sprite-ispritflags-br flag-icon flag-icon-br' style='display:inline-block;vertical-align:middle;'></div> <div title='Bahamas' class='sprite-ispritflags sprite-ispritflags-bs flag-icon flag-icon-bs' style='display:inline-block;vertical-align:middle;'></div> <div title='Belarus' class='sprite-ispritflags sprite-ispritflags-by flag-icon flag-icon-by' style='display:inline-block;vertical-align:middle;'></div> <div title='Canada' class='sprite-ispritflags sprite-ispritflags-ca flag-icon flag-icon-ca' style='display:inline-block;vertical-align:middle;'></div> <div title='Switzerland' class='sprite-ispritflags sprite-ispritflags-ch flag-icon flag-icon-ch' style='display:inline-block;vertical-align:middle;'></div> <div title='Chile' class='sprite-ispritflags sprite-ispritflags-cl flag-icon flag-icon-cl' style='display:inline-block;vertical-align:middle;'></div> <div title='Cameroon' class='sprite-ispritflags sprite-ispritflags-cm flag-icon flag-icon-cm' style='display:inline-block;vertical-align:middle;'></div> <div title='China' class='sprite-ispritflags sprite-ispritflags-cn flag-icon flag-icon-cn' style='display:inline-block;vertical-align:middle;'></div> <div title='Colombia' class='sprite-ispritflags sprite-ispritflags-co flag-icon flag-icon-co' style='display:inline-block;vertical-align:middle;'></div> <div title='Costa Rica' class='sprite-ispritflags sprite-ispritflags-cr flag-icon flag-icon-cr' style='display:inline-block;vertical-align:middle;'></div> <div title='Cuba' class='sprite-ispritflags sprite-ispritflags-cu flag-icon flag-icon-cu' style='display:inline-block;vertical-align:middle;'></div> <div title='Curaçao' class='sprite-ispritflags sprite-ispritflags-cw flag-icon flag-icon-cw' style='display:inline-block;vertical-align:middle;'></div> <div title='Cyprus' class='sprite-ispritflags sprite-ispritflags-cy flag-icon flag-icon-cy' style='display:inline-block;vertical-align:middle;'></div> <div title='Czechia' class='sprite-ispritflags sprite-ispritflags-cz flag-icon flag-icon-cz' style='display:inline-block;vertical-align:middle;'></div> <div title='Germany' class='sprite-ispritflags sprite-ispritflags-de flag-icon flag-icon-de' style='display:inline-block;vertical-align:middle;'></div> <div title='Denmark' class='sprite-ispritflags sprite-ispritflags-dk flag-icon flag-icon-dk' style='display:inline-block;vertical-align:middle;'></div> <div title='Dominican Republic' class='sprite-ispritflags sprite-ispritflags-do flag-icon flag-icon-do' style='display:inline-block;vertical-align:middle;'></div> <div title='Algeria' class='sprite-ispritflags sprite-ispritflags-dz flag-icon flag-icon-dz' style='display:inline-block;vertical-align:middle;'></div> <div title='Ecuador' class='sprite-ispritflags sprite-ispritflags-ec flag-icon flag-icon-ec' style='display:inline-block;vertical-align:middle;'></div> <div title='Estonia' class='sprite-ispritflags sprite-ispritflags-ee flag-icon flag-icon-ee' style='display:inline-block;vertical-align:middle;'></div> <div title='Egypt' class='sprite-ispritflags sprite-ispritflags-eg flag-icon flag-icon-eg' style='display:inline-block;vertical-align:middle;'></div> <div title='Spain' class='sprite-ispritflags sprite-ispritflags-es flag-icon flag-icon-es' style='display:inline-block;vertical-align:middle;'></div> <div title='Ethiopia' class='sprite-ispritflags sprite-ispritflags-et flag-icon flag-icon-et' style='display:inline-block;vertical-align:middle;'></div> <div title='Finland' class='sprite-ispritflags sprite-ispritflags-fi flag-icon flag-icon-fi' style='display:inline-block;vertical-align:middle;'></div> <div title='France' class='sprite-ispritflags sprite-ispritflags-fr flag-icon flag-icon-fr' style='display:inline-block;vertical-align:middle;'></div> <div title='United Kingdom' class='sprite-ispritflags sprite-ispritflags-gb flag-icon flag-icon-gb' style='display:inline-block;vertical-align:middle;'></div> <div title='Georgia' class='sprite-ispritflags sprite-ispritflags-ge flag-icon flag-icon-ge' style='display:inline-block;vertical-align:middle;'></div> <div title='Ghana' class='sprite-ispritflags sprite-ispritflags-gh flag-icon flag-icon-gh' style='display:inline-block;vertical-align:middle;'></div> <div title='Guadeloupe' class='sprite-ispritflags sprite-ispritflags-gp flag-icon flag-icon-gp' style='display:inline-block;vertical-align:middle;'></div> <div title='Greece' class='sprite-ispritflags sprite-ispritflags-gr flag-icon flag-icon-gr' style='display:inline-block;vertical-align:middle;'></div> <div title='Guatemala' class='sprite-ispritflags sprite-ispritflags-gt flag-icon flag-icon-gt' style='display:inline-block;vertical-align:middle;'></div> <div title='Guam' class='sprite-ispritflags sprite-ispritflags-gu flag-icon flag-icon-gu' style='display:inline-block;vertical-align:middle;'></div> <div title='Hong Kong' class='sprite-ispritflags sprite-ispritflags-hk flag-icon flag-icon-hk' style='display:inline-block;vertical-align:middle;'></div> <div title='Honduras' class='sprite-ispritflags sprite-ispritflags-hn flag-icon flag-icon-hn' style='display:inline-block;vertical-align:middle;'></div> <div title='Croatia' class='sprite-ispritflags sprite-ispritflags-hr flag-icon flag-icon-hr' style='display:inline-block;vertical-align:middle;'></div> <div title='Hungary' class='sprite-ispritflags sprite-ispritflags-hu flag-icon flag-icon-hu' style='display:inline-block;vertical-align:middle;'></div> <div title='Indonesia' class='sprite-ispritflags sprite-ispritflags-id flag-icon flag-icon-id' style='display:inline-block;vertical-align:middle;'></div> <div title='Ireland' class='sprite-ispritflags sprite-ispritflags-ie flag-icon flag-icon-ie' style='display:inline-block;vertical-align:middle;'></div> <div title='Israel' class='sprite-ispritflags sprite-ispritflags-il flag-icon flag-icon-il' style='display:inline-block;vertical-align:middle;'></div> <div title='India' class='sprite-ispritflags sprite-ispritflags-in flag-icon flag-icon-in' style='display:inline-block;vertical-align:middle;'></div> <div title='Iraq' class='sprite-ispritflags sprite-ispritflags-iq flag-icon flag-icon-iq' style='display:inline-block;vertical-align:middle;'></div> <div title='Iran' class='sprite-ispritflags sprite-ispritflags-ir flag-icon flag-icon-ir' style='display:inline-block;vertical-align:middle;'></div> <div title='Iceland' class='sprite-ispritflags sprite-ispritflags-is flag-icon flag-icon-is' style='display:inline-block;vertical-align:middle;'></div> <div title='Italy' class='sprite-ispritflags sprite-ispritflags-it flag-icon flag-icon-it' style='display:inline-block;vertical-align:middle;'></div> <div title='Jersey' class='sprite-ispritflags sprite-ispritflags-je flag-icon flag-icon-je' style='display:inline-block;vertical-align:middle;'></div> <div title='Jordan' class='sprite-ispritflags sprite-ispritflags-jo flag-icon flag-icon-jo' style='display:inline-block;vertical-align:middle;'></div> <div title='Japan' class='sprite-ispritflags sprite-ispritflags-jp flag-icon flag-icon-jp' style='display:inline-block;vertical-align:middle;'></div> <div title='Kenya' class='sprite-ispritflags sprite-ispritflags-ke flag-icon flag-icon-ke' style='display:inline-block;vertical-align:middle;'></div> <div title='Kyrgyzstan' class='sprite-ispritflags sprite-ispritflags-kg flag-icon flag-icon-kg' style='display:inline-block;vertical-align:middle;'></div> <div title='Cambodia' class='sprite-ispritflags sprite-ispritflags-kh flag-icon flag-icon-kh' style='display:inline-block;vertical-align:middle;'></div> <div title='South Korea' class='sprite-ispritflags sprite-ispritflags-kr flag-icon flag-icon-kr' style='display:inline-block;vertical-align:middle;'></div> <div title='Kuwait' class='sprite-ispritflags sprite-ispritflags-kw flag-icon flag-icon-kw' style='display:inline-block;vertical-align:middle;'></div> <div title='Kazakhstan' class='sprite-ispritflags sprite-ispritflags-kz flag-icon flag-icon-kz' style='display:inline-block;vertical-align:middle;'></div> <div title='Laos' 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title='Mongolia' class='sprite-ispritflags sprite-ispritflags-mn flag-icon flag-icon-mn' style='display:inline-block;vertical-align:middle;'></div> <div title='Macao' class='sprite-ispritflags sprite-ispritflags-mo flag-icon flag-icon-mo' style='display:inline-block;vertical-align:middle;'></div> <div title='Martinique' class='sprite-ispritflags sprite-ispritflags-mq flag-icon flag-icon-mq' style='display:inline-block;vertical-align:middle;'></div> <div title='Malta' class='sprite-ispritflags sprite-ispritflags-mt flag-icon flag-icon-mt' style='display:inline-block;vertical-align:middle;'></div> <div title='Mauritius' class='sprite-ispritflags sprite-ispritflags-mu flag-icon flag-icon-mu' style='display:inline-block;vertical-align:middle;'></div> <div title='Maldives' class='sprite-ispritflags sprite-ispritflags-mv flag-icon flag-icon-mv' style='display:inline-block;vertical-align:middle;'></div> <div title='Mexico' class='sprite-ispritflags sprite-ispritflags-mx flag-icon 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style='display:inline-block;vertical-align:middle;'></div> <div title='Puerto Rico' class='sprite-ispritflags sprite-ispritflags-pr flag-icon flag-icon-pr' style='display:inline-block;vertical-align:middle;'></div> <div title='Palestine' class='sprite-ispritflags sprite-ispritflags-ps flag-icon flag-icon-ps' style='display:inline-block;vertical-align:middle;'></div> <div title='Portugal' class='sprite-ispritflags sprite-ispritflags-pt flag-icon flag-icon-pt' style='display:inline-block;vertical-align:middle;'></div> <div title='Paraguay' class='sprite-ispritflags sprite-ispritflags-py flag-icon flag-icon-py' style='display:inline-block;vertical-align:middle;'></div> <div title='Qatar' class='sprite-ispritflags sprite-ispritflags-qa flag-icon flag-icon-qa' style='display:inline-block;vertical-align:middle;'></div> <div title='Romania' class='sprite-ispritflags sprite-ispritflags-ro flag-icon flag-icon-ro' style='display:inline-block;vertical-align:middle;'></div> <div title='Serbia' class='sprite-ispritflags sprite-ispritflags-rs flag-icon flag-icon-rs' style='display:inline-block;vertical-align:middle;'></div> <div title='Russia' class='sprite-ispritflags sprite-ispritflags-ru flag-icon flag-icon-ru' style='display:inline-block;vertical-align:middle;'></div> <div title='Saudi Arabia' class='sprite-ispritflags sprite-ispritflags-sa flag-icon flag-icon-sa' style='display:inline-block;vertical-align:middle;'></div> <div title='Seychelles' class='sprite-ispritflags sprite-ispritflags-sc flag-icon flag-icon-sc' style='display:inline-block;vertical-align:middle;'></div> <div title='Sudan' class='sprite-ispritflags sprite-ispritflags-sd flag-icon flag-icon-sd' style='display:inline-block;vertical-align:middle;'></div> <div title='Sweden' class='sprite-ispritflags sprite-ispritflags-se flag-icon flag-icon-se' style='display:inline-block;vertical-align:middle;'></div> <div title='Singapore' class='sprite-ispritflags sprite-ispritflags-sg flag-icon flag-icon-sg' style='display:inline-block;vertical-align:middle;'></div> <div title='Slovenia' class='sprite-ispritflags sprite-ispritflags-si flag-icon flag-icon-si' style='display:inline-block;vertical-align:middle;'></div> <div title='Slovakia' class='sprite-ispritflags sprite-ispritflags-sk flag-icon flag-icon-sk' style='display:inline-block;vertical-align:middle;'></div> <div title='Somalia' class='sprite-ispritflags sprite-ispritflags-so flag-icon flag-icon-so' style='display:inline-block;vertical-align:middle;'></div> <div title='El Salvador' class='sprite-ispritflags sprite-ispritflags-sv flag-icon flag-icon-sv' style='display:inline-block;vertical-align:middle;'></div> <div title='Syria' class='sprite-ispritflags sprite-ispritflags-sy flag-icon flag-icon-sy' style='display:inline-block;vertical-align:middle;'></div> <div title='Thailand' class='sprite-ispritflags sprite-ispritflags-th flag-icon flag-icon-th' style='display:inline-block;vertical-align:middle;'></div> <div title='Tajikistan' class='sprite-ispritflags sprite-ispritflags-tj flag-icon flag-icon-tj' style='display:inline-block;vertical-align:middle;'></div> <div title='Turkmenistan' class='sprite-ispritflags sprite-ispritflags-tm flag-icon flag-icon-tm' style='display:inline-block;vertical-align:middle;'></div> <div title='Tunisia' class='sprite-ispritflags sprite-ispritflags-tn flag-icon flag-icon-tn' style='display:inline-block;vertical-align:middle;'></div> <div title='Turkey' class='sprite-ispritflags sprite-ispritflags-tr flag-icon flag-icon-tr' style='display:inline-block;vertical-align:middle;'></div> <div title='Taiwan' class='sprite-ispritflags sprite-ispritflags-tw flag-icon flag-icon-tw' style='display:inline-block;vertical-align:middle;'></div> <div title='Tanzania' class='sprite-ispritflags sprite-ispritflags-tz flag-icon flag-icon-tz' style='display:inline-block;vertical-align:middle;'></div> <div title='Ukraine' class='sprite-ispritflags sprite-ispritflags-ua flag-icon flag-icon-ua' style='display:inline-block;vertical-align:middle;'></div> <div title='Uganda' class='sprite-ispritflags sprite-ispritflags-ug flag-icon flag-icon-ug' style='display:inline-block;vertical-align:middle;'></div> <div title='United States' class='sprite-ispritflags sprite-ispritflags-us flag-icon flag-icon-us' style='display:inline-block;vertical-align:middle;'></div> <div title='Uruguay' class='sprite-ispritflags sprite-ispritflags-uy flag-icon flag-icon-uy' style='display:inline-block;vertical-align:middle;'></div> <div title='Uzbekistan' class='sprite-ispritflags sprite-ispritflags-uz flag-icon flag-icon-uz' style='display:inline-block;vertical-align:middle;'></div> <div title='Venezuela' class='sprite-ispritflags sprite-ispritflags-ve flag-icon flag-icon-ve' style='display:inline-block;vertical-align:middle;'></div> <div title='Vietnam' class='sprite-ispritflags sprite-ispritflags-vn flag-icon flag-icon-vn' style='display:inline-block;vertical-align:middle;'></div> <div title='Kosovo' class='sprite-ispritflags sprite-ispritflags-xk flag-icon flag-icon-xk' style='display:inline-block;vertical-align:middle;'></div> <div title='Yemen' class='sprite-ispritflags sprite-ispritflags-ye flag-icon flag-icon-ye' style='display:inline-block;vertical-align:middle;'></div> <div title='South Africa' class='sprite-ispritflags sprite-ispritflags-za flag-icon flag-icon-za' style='display:inline-block;vertical-align:middle;'></div> <script> function ntfConf() { return { page: "contact", divId: "ntf-body-first" } } </script> <div id='ntf-body-first' style='display:none;'></div> </div> </div> <center><img src='https://aqicn.org/images/MadeInBJ.png' alt='made in 北京' border=0></center> <br> <center> </center> </div></div></div><div class='h1section h1section-divider'><div class='h1section-rainbow'><div></div><div></div><div></div><div></div><div></div></div><h1><div id='h1header3' style='padding:2px;font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;'>Contacting the World Air Quality Index team</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header3',.88,{maxfs:45}); }; </script><div class='whitebody' style='font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;'><div class='section-outer'><div class='section-content' ><p> If you would like to send us a message, please try to use one of the following dedicated contact channels: </p> <style> .channels div.channel { margin-bottom: 20px; } .channels a { color: #000; } .channels a:hover { text-decoration: none; color: #0086c8; } .ui.small.header { color: rgb(40, 91, 117); font-variant: small-caps; } .channels a { cursor: pointer; border: 1px solid white; display: block; } div.channel-link { color: #0086c8; } div.channel-icon { float: right; font-size: 3em; vertical-align: top; } .channels a:hover { border: 1px solid #ccc; background: #eee; border-radius: 3px; } </style> <div class='ui form channels'> <div class='fields'> <div class='ui five wide field'> <div class='ui small header'>Measuring the Air Quality in your city</div> <a href='/gaia/overview/'> <div class='channel-link'>aqicn.org/gaia/</div> <div class='channel'> If you would like to have your own air quality monitoring station to measure the air pollution levels in your city, then check the GAIA page. </div> </a> <a href='/country/'> <div class='channel-link'>aqicn.org/country/</div> <div class='channel'> If your country or city is not covered on the map, and would like to setup a citizen network, click to check "new country" coverage page. </div> </a> <a href='/forecast/'> <div class='channel-link'>aqicn.org/forecast/</div> <div class='channel'> If you need to compare the various forecast models used on the map, click to check the "forecast" page. </div> </a> </div> <div class='ui five wide field'> <div class='ui small header'>Historical & Real-time Data & API</div> <a href='/data-platform/register/'> <div class='channel-link'>aqicn.org/data-platform/</div> <div class='channel'> If you need access to the worldwide historical air quality, click to data check the "data platform" page. </div> </a> <a href='/api/'> <div class='channel-link'>aqicn.org/api/</div> <div class='channel'> If you need access to the real-time air quality data, or the forecast data, click to check the "API" page. </div> </a> <a href='/data-feed/'> <div class='channel-link'>aqicn.org/data-feed/</div> <div class='channel'> If you have your own air quality monitoring station, and would like it to publish it on our map, click to check the data feed page. </div> </a> </div> <div class='ui six wide field'> <div class='ui small header'>Contributing or Promoting to the project</div> <a href='/open-source/'> <div class='channel-link'>aqicn.org/open-source/</div> <div class='channel'> If you are looking for open source initiatives, check the "open source" page. </div> </a> <a href='/contact/'> <div class='channel-link'>aqicn.org/contribute/</div> <div class='channel'> If you want to contribute and help promoting air quality awareness, check the "contribute" page. </div> </a> <a href='/media/'> <div class='channel-link'>aqicn.org/media/</div> <div class='channel'> If you are from a media and want to use a screen shot of our sites (aqicn.org and waqi.info), no need to ask for permission .. just go ahead! </div> </a> </div> </div> </div> <div class='channel' onClick='showFeedbackForm()' style='cursor: pointer;'> If none of the above channels match your need, click here to send us a message (but, please, keep in mind that due to our limited team capacity we can not guarantee replying to all messages). </div> <form id='feedback-form' style='display:none;'> <style> #feedback-form { padding: 10px; } #feedback-form textarea { width: 100%; padding: 10px; font-family: inherit; background: #f8f8f8; border: 1px solid #0086c8; } #feedback-form input.email { width: 100%; padding: 10px; max-width: 420px; border: 1px solid #0086c8; } #feedback-form input.submit { padding: 10px; background: #0086c8; border: none; color: white; } </style> <textarea class='form-input' rows=8 name="message" required placeholder='Tell us about your experience'></textarea> <center id='feedback-email' style='display:none;color:#888;margin:10px;'> (optional) let us know your email if you want to receive an answer: <input class='form-input email' name="email" value='' placeholder='you@mail.com'> </center> <input class='form-input' type='hidden' name="source" value='contact'> <center id='captcha'> <div class="aqspinner3"><div class="r1"></div><div class="r2"></div><div class="r3"></div><div class="r4"></div><div class="r5"></div></div> </center> </form> <center><br>-<svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" version="1" viewBox="0 0 26 26" enable-background="new 0 0 26 26"><path d="M 15.65625 -0.03125 C 14.280846 -0.03760636 12.828752 0.09254274 11.3125 0.40625 C 8.28651 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src='https://aqicn.org/air-cache/jquery-3.7.1.min.js?_=20250116.195014' type='text/javascript'></script><script src='/jscripts/formantic-ui/dist/components/calendar.min.js?_=20191228.123631&type=script'></script><script src='/jscripts/formantic-ui/dist/semantic.min.js?_=20191228.123631&type=script'></script><link href='/jscripts/formantic-ui/dist/semantic.min.css?_=20191228.123631&type=css' rel='stylesheet'/></div></div></div><div class='h1section h1section-divider'><div class='h1section-rainbow'><div></div><div></div><div></div><div></div><div></div></div><h1><div id='h1header4' style='padding:2px;font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;'>Credits</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header4',.88,{maxfs:45}); }; </script><div class='whitebody' style='font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;'><div class='section-outer'><div class='section-content' > <p> All the credits must go to the US Embassies in China for initially providing and publishing their PM2.5 air quality measurement, to the China MEP for the huge effort in providing PM2.5 for so many cities, and all the worldwide Environment Protection Agencies for their excellent work on monitoring and providing Air Quality information . </p> <p> All this work is made possible thanks to the excellent work for the <a href='/sources/'>worldwide EPA</a> (below list not exhaustive): </p> <link rel="stylesheet" href="/images/isprites/epa-feeds/2019-12-01/epafeeds.css" type="text/css"> </link> <style> .epa { display: inline-block; margin: 3px; } </style> <div style='margin:10px;'> <div class='sprite-epafeeds-Alaska-DEC-Alaska epa' title='Alaska DEC Alaska' ></div> <div class='sprite-epafeeds-Andalucia-Conserjeria-de-medio-ambiente epa' title='Andalucia Conserjeria de medio ambiente' ></div> <div class='sprite-epafeeds-Argentina-BahiaBianca epa' title='Argentina BahiaBianca' ></div> <div class='sprite-epafeeds-Argentina-BahiaBiancaEPA epa' title='Argentina BahiaBiancaEPA' ></div> <div class='sprite-epafeeds-Australia-NSW epa' title='Australia NSW' ></div> <div class='sprite-epafeeds-Australia-NTEPA epa' title='Australia NTEPA' ></div> <div class='sprite-epafeeds-Australia-Queensland epa' title='Australia Queensland' ></div> <div class='sprite-epafeeds-Australia-SouthAustralia epa' title='Australia SouthAustralia' ></div> <div class='sprite-epafeeds-Australia-Tasmania epa' title='Australia Tasmania' ></div> <div class='sprite-epafeeds-Australia-Victoria epa' title='Australia Victoria' ></div> <div class='sprite-epafeeds-Australia-WesternAustralia epa' title='Australia WesternAustralia' ></div> <div class='sprite-epafeeds-Austria-umweltbundesamt epa' title='Austria umweltbundesamt' ></div> <div class='sprite-epafeeds-Beligium-irceline epa' title='Beligium irceline' ></div> <div class='sprite-epafeeds-Bolivia-Cochabamba epa' title='Bolivia Cochabamba' ></div> <div class='sprite-epafeeds-Bosnia-EKO-Zrak epa' title='Bosnia EKO Zrak' ></div> <div class='sprite-epafeeds-Bosnia-Federalni-Hidrometeoroloski-Zavod epa' title='Bosnia Federalni Hidrometeoroloski Zavod' ></div> <div class='sprite-epafeeds-Bosnia-Kanton-Sarajevo epa' title='Bosnia Kanton Sarajevo' ></div> <div class='sprite-epafeeds-Bosnia-zrakatk epa' title='Bosnia zrakatk' ></div> <div class='sprite-epafeeds-Brazil-CETESB epa' title='Brazil CETESB' ></div> <div class='sprite-epafeeds-Bretagne-Air-Breizh epa' title='Bretagne Air Breizh' ></div> <div class='sprite-epafeeds-Brunei-DoEPR epa' title='Brunei DoEPR' ></div> <div class='sprite-epafeeds-Bulgaria-Burgas epa' title='Bulgaria Burgas' ></div> <div class='sprite-epafeeds-Canada-Alberta epa' title='Canada Alberta' ></div> <div class='sprite-epafeeds-Canada-BritishColumbia epa' title='Canada BritishColumbia' ></div> <div class='sprite-epafeeds-Canada-Manitoba epa' title='Canada Manitoba' ></div> <div class='sprite-epafeeds-Canada-Montreal epa' title='Canada Montreal' ></div> <div class='sprite-epafeeds-Canada-NewBrunswick epa' title='Canada NewBrunswick' ></div> <div class='sprite-epafeeds-Canada-NewFoundland-Labrador epa' title='Canada NewFoundland Labrador' ></div> <div class='sprite-epafeeds-Canada-NorthWestTerritories epa' title='Canada NorthWestTerritories' ></div> <div class='sprite-epafeeds-Canada-Nova-Scotia epa' title='Canada Nova Scotia' ></div> <div class='sprite-epafeeds-Canada-Ontario epa' title='Canada Ontario' ></div> <div class='sprite-epafeeds-Canada-Quebec epa' title='Canada Quebec' ></div> <div class='sprite-epafeeds-Canada-Saskatchewan epa' title='Canada Saskatchewan' ></div> <div class='sprite-epafeeds-Chile-SINCA epa' title='Chile SINCA' ></div> <div class='sprite-epafeeds-Colombia-Aburra epa' title='Colombia Aburra' ></div> <div class='sprite-epafeeds-Colombia-OAB epa' title='Colombia OAB' ></div> <div class='sprite-epafeeds-Colombia-siata epa' title='Colombia siata' ></div> <div class='sprite-epafeeds-Croatia-Kvaliteta-zraka-u-Republici-Hrvatskoj epa' title='Croatia Kvaliteta zraka u Republici Hrvatskoj' ></div> <div class='sprite-epafeeds-Cyprus-Ministry-of-Labour-Welfare-and-Social-Insurance epa' title='Cyprus Ministry of Labour Welfare and Social Insurance' ></div> <div class='sprite-epafeeds-CzechRepublic-CHMU epa' title='CzechRepublic CHMU' ></div> <div class='sprite-epafeeds-Denmark-AarhusUniv epa' title='Denmark AarhusUniv' ></div> <div class='sprite-epafeeds-Ecuador-Cuenca epa' title='Ecuador Cuenca' ></div> <div class='sprite-epafeeds-Ecuador-Quito-Alcadia epa' title='Ecuador Quito Alcadia' ></div> <div class='sprite-epafeeds-ElSalvador-MinisterioMedioAmbiente epa' title='ElSalvador MinisterioMedioAmbiente' ></div> <div class='sprite-epafeeds-Estonia-EKUK epa' title='Estonia EKUK' ></div> <div class='sprite-epafeeds-Europe-EEA epa' title='Europe EEA' ></div> <div class='sprite-epafeeds-Finland-ilmanlaatu epa' title='Finland ilmanlaatu' ></div> <div class='sprite-epafeeds-France-AIR-Languedoc-Roussillon epa' title='France AIR Languedoc Roussillon' ></div> <div class='sprite-epafeeds-France-AirAquitaine epa' title='France AirAquitaine' ></div> <div class='sprite-epafeeds-France-AirLorraine epa' title='France AirLorraine' ></div> <div class='sprite-epafeeds-France-AirNormand epa' title='France AirNormand' ></div> <div class='sprite-epafeeds-France-AirPL epa' title='France AirPL' ></div> <div class='sprite-epafeeds-France-AirRhoneAlpes epa' title='France AirRhoneAlpes' ></div> <div class='sprite-epafeeds-France-AmtoNPC epa' title='France AmtoNPC' ></div> <div class='sprite-epafeeds-France-Atmo-BFC epa' title='France Atmo BFC' ></div> <div class='sprite-epafeeds-France-AtmoAuvergne epa' title='France AtmoAuvergne' ></div> <div class='sprite-epafeeds-France-AtmoPicardie epa' title='France AtmoPicardie' ></div> <div class='sprite-epafeeds-France-AtmoPoitouCharentes epa' title='France AtmoPoitouCharentes' ></div> <div class='sprite-epafeeds-France-AtmoReunion epa' title='France AtmoReunion' ></div> <div class='sprite-epafeeds-France-LigAir epa' title='France LigAir' ></div> <div class='sprite-epafeeds-France-Madinair epa' title='France Madinair' ></div> <div class='sprite-epafeeds-France-Ora-Reunion epa' title='France Ora Reunion' ></div> <div class='sprite-epafeeds-France-OraGuyane epa' title='France OraGuyane' ></div> <div class='sprite-epafeeds-France-Oramip epa' title='France Oramip' ></div> <div class='sprite-epafeeds-France-Qualitair-Corse epa' title='France Qualitair Corse' ></div> <div class='sprite-epafeeds-France-atmo-ca epa' title='France atmo ca' ></div> <div class='sprite-epafeeds-France-atmo-grand-est epa' title='France atmo grand est' ></div> <div class='sprite-epafeeds-France-limair epa' title='France limair' ></div> <div class='sprite-epafeeds-France-scalair epa' title='France scalair' ></div> <div class='sprite-epafeeds-Gaia epa' title='Gaia' ></div> <div class='sprite-epafeeds-Georgiamepa epa' title='Georgiamepa' ></div> <div class='sprite-epafeeds-Germany-BadenWurttemberg epa' title='Germany BadenWurttemberg' ></div> <div class='sprite-epafeeds-Germany-BayernMunich epa' title='Germany BayernMunich' ></div> <div class='sprite-epafeeds-Germany-Berlin epa' title='Germany Berlin' ></div> <div class='sprite-epafeeds-Germany-Bradennburg epa' title='Germany Bradennburg' ></div> <div class='sprite-epafeeds-Germany-Bremen epa' title='Germany Bremen' ></div> <div class='sprite-epafeeds-Germany-Hamburg epa' title='Germany Hamburg' ></div> <div class='sprite-epafeeds-Germany-Hesse epa' title='Germany Hesse' ></div> <div class='sprite-epafeeds-Germany-NiederSachsen epa' title='Germany NiederSachsen' ></div> <div class='sprite-epafeeds-Germany-RheinlandPfalz epa' title='Germany RheinlandPfalz' ></div> <div class='sprite-epafeeds-Germany-Sachsen epa' title='Germany Sachsen' ></div> <div class='sprite-epafeeds-Germany-Schleswig-Holstein epa' title='Germany Schleswig Holstein' ></div> <div class='sprite-epafeeds-Greece-TEI epa' title='Greece TEI' ></div> <div class='sprite-epafeeds-Greeceypeka epa' title='Greeceypeka' ></div> <div class='sprite-epafeeds-Guadeloupe-Gwadair epa' title='Guadeloupe Gwadair' ></div> <div class='sprite-epafeeds-Guatemala-insivumeh epa' title='Guatemala insivumeh' ></div> <div class='sprite-epafeeds-Hungary-foldmuvelesugyi epa' title='Hungary foldmuvelesugyi' ></div> <div class='sprite-epafeeds-India-CPCB epa' title='India CPCB' ></div> <div class='sprite-epafeeds-India-DPCCC epa' title='India DPCCC' ></div> <div class='sprite-epafeeds-India-IITM epa' title='India IITM' ></div> <div class='sprite-epafeeds-Indonesia-Badan-Meteorologi-Klimatologi-dan-Geofisika epa' title='Indonesia Badan Meteorologi Klimatologi dan Geofisika' ></div> <div class='sprite-epafeeds-Iran-AqccTehran epa' title='Iran AqccTehran' ></div> <div class='sprite-epafeeds-Ireland-EPA epa' title='Ireland EPA' ></div> <div class='sprite-epafeeds-Israel-Sviva epa' title='Israel Sviva' ></div> <div class='sprite-epafeeds-Italy-Arpa-Bolzano epa' title='Italy Arpa Bolzano' ></div> <div class='sprite-epafeeds-Italy-Arpa-Campania epa' title='Italy Arpa Campania' ></div> <div class='sprite-epafeeds-Italy-Arpa-EmiliaRomagna epa' title='Italy Arpa EmiliaRomagna' ></div> <div class='sprite-epafeeds-Italy-Arpa-FVG epa' title='Italy Arpa FVG' ></div> <div class='sprite-epafeeds-Italy-Arpa-Lazio epa' title='Italy Arpa Lazio' ></div> <div class='sprite-epafeeds-Italy-Arpa-Lombardia epa' title='Italy Arpa Lombardia' ></div> <div class='sprite-epafeeds-Italy-Arpa-Piemonte epa' title='Italy Arpa Piemonte' ></div> <div class='sprite-epafeeds-Italy-Arpa-Toscana epa' title='Italy Arpa Toscana' ></div> <div class='sprite-epafeeds-Japan-CityOfSapporo epa' title='Japan CityOfSapporo' ></div> <div class='sprite-epafeeds-Japan-Fukuoka epa' title='Japan Fukuoka' ></div> <div class='sprite-epafeeds-Japan-Hiroshima epa' title='Japan Hiroshima' ></div> <div class='sprite-epafeeds-Japan-Hyogo epa' title='Japan Hyogo' ></div> <div class='sprite-epafeeds-Japan-Ibaraki epa' title='Japan Ibaraki' ></div> <div class='sprite-epafeeds-Japan-Kanagawa epa' title='Japan Kanagawa' ></div> <div class='sprite-epafeeds-Japan-Kyoyo epa' title='Japan Kyoyo' ></div> <div class='sprite-epafeeds-Japan-Miyagi epa' title='Japan Miyagi' ></div> <div class='sprite-epafeeds-Japan-Osaka epa' title='Japan Osaka' ></div> <div class='sprite-epafeeds-Japan-Saitama epa' title='Japan Saitama' ></div> <div class='sprite-epafeeds-Japan-Soramame epa' title='Japan Soramame' ></div> <div class='sprite-epafeeds-Japan-Tokyo epa' title='Japan Tokyo' ></div> <div class='sprite-epafeeds-Japan-hokkaido epa' title='Japan hokkaido' ></div> <div class='sprite-epafeeds-Jordan-moenv epa' title='Jordan moenv' ></div> <div class='sprite-epafeeds-Kosovo-IHMK epa' title='Kosovo IHMK' ></div> <div class='sprite-epafeeds-Lithuania-AAA epa' title='Lithuania AAA' ></div> <div class='sprite-epafeeds-Luxembourg-EPA epa' title='Luxembourg EPA' ></div> <div class='sprite-epafeeds-MX-Guanajuato epa' title='MX Guanajuato' ></div> <div class='sprite-epafeeds-MX-Nuevo-Leon epa' title='MX Nuevo Leon' ></div> <div class='sprite-epafeeds-Macedonia-moepp epa' title='Macedonia moepp' ></div> <div class='sprite-epafeeds-Malaysia-Jabatan-Alam-Sekitar epa' title='Malaysia Jabatan Alam Sekitar' ></div> <div class='sprite-epafeeds-Malta-Era epa' title='Malta Era' ></div> <div class='sprite-epafeeds-Mexico-CuidaMexico epa' title='Mexico CuidaMexico' ></div> <div class='sprite-epafeeds-Mexico-INECC epa' title='Mexico INECC' ></div> <div class='sprite-epafeeds-Mexico-Jalisco epa' title='Mexico Jalisco' ></div> <div class='sprite-epafeeds-Mexico-TolucaEdomex epa' title='Mexico TolucaEdomex' ></div> <div class='sprite-epafeeds-Mongolia-UB-AQD epa' title='Mongolia UB AQD' ></div> <div class='sprite-epafeeds-Mongolia-UB-namem epa' title='Mongolia UB namem' ></div> <div class='sprite-epafeeds-Nepal-DEAQM epa' title='Nepal DEAQM' ></div> <div class='sprite-epafeeds-Netherland-RIVM epa' title='Netherland RIVM' ></div> <div class='sprite-epafeeds-New-Mexico epa' title='New Mexico' ></div> <div class='sprite-epafeeds-NewZealand-Auckland epa' title='NewZealand Auckland' ></div> <div class='sprite-epafeeds-NewZealand-BayOfPlenty epa' title='NewZealand BayOfPlenty' ></div> <div class='sprite-epafeeds-NewZealand-Cantebury epa' title='NewZealand Cantebury' ></div> <div class='sprite-epafeeds-NewZealand-GWRC epa' title='NewZealand GWRC' ></div> <div class='sprite-epafeeds-NewZealand-HawkesBay epa' title='NewZealand HawkesBay' ></div> <div class='sprite-epafeeds-NewZealand-Horizon epa' title='NewZealand Horizon' ></div> <div class='sprite-epafeeds-NewZealand-LAWA epa' title='NewZealand LAWA' ></div> <div class='sprite-epafeeds-NewZealand-Marlborough epa' title='NewZealand Marlborough' ></div> <div class='sprite-epafeeds-NewZealand-Nelson epa' title='NewZealand Nelson' ></div> <div class='sprite-epafeeds-NewZealand-NorthLand epa' title='NewZealand NorthLand' ></div> <div class='sprite-epafeeds-NewZealand-Otago epa' title='NewZealand Otago' ></div> <div class='sprite-epafeeds-NewZealand-SouthLand epa' title='NewZealand SouthLand' ></div> <div class='sprite-epafeeds-NewZealand-Taranaki epa' title='NewZealand Taranaki' ></div> <div class='sprite-epafeeds-NewZealand-Tasman epa' title='NewZealand Tasman' ></div> <div class='sprite-epafeeds-NewZealand-Waikato epa' title='NewZealand Waikato' ></div> <div class='sprite-epafeeds-NewZealand-WestCoast epa' title='NewZealand WestCoast' ></div> <div class='sprite-epafeeds-Norway-Luftkvalitet epa' title='Norway Luftkvalitet' ></div> <div class='sprite-epafeeds-Oman-Sohar-ERC epa' title='Oman Sohar ERC' ></div> <div class='sprite-epafeeds-Ontario-Ministry-of-the-Environment-and-Climate-Change epa' title='Ontario Ministry of the Environment and Climate Change' ></div> <div class='sprite-epafeeds-Oregon-DEQ epa' title='Oregon DEQ' ></div> <div class='sprite-epafeeds-Paca-Air-Paca epa' title='Paca Air Paca' ></div> <div class='sprite-epafeeds-Paris-Air-Parif epa' title='Paris Air Parif' ></div> <div class='sprite-epafeeds-Pennsylvania-DEP epa' title='Pennsylvania DEP' ></div> <div class='sprite-epafeeds-Peru-MinisterioDelAmbiente epa' title='Peru MinisterioDelAmbiente' ></div> <div class='sprite-epafeeds-Peru-SENAMHI epa' title='Peru SENAMHI' ></div> <div class='sprite-epafeeds-Philippines-EMB-DENR epa' title='Philippines EMB DENR' ></div> <div class='sprite-epafeeds-Poland-wios-lodz epa' title='Poland wios lodz' ></div> <div class='sprite-epafeeds-PuertoRico-JCA epa' title='PuertoRico JCA' ></div> <div class='sprite-epafeeds-Region-de-murcia epa' title='Region de murcia' ></div> <div class='sprite-epafeeds-RomaniaANPM epa' title='RomaniaANPM' ></div> <div class='sprite-epafeeds-Russia-MoscowGov epa' title='Russia MoscowGov' ></div> <div class='sprite-epafeeds-SaudiArabiaMEP epa' title='SaudiArabiaMEP' ></div> <div class='sprite-epafeeds-Serbia-EPA epa' title='Serbia EPA' ></div> <div class='sprite-epafeeds-Singapore-NEA epa' title='Singapore NEA' ></div> <div class='sprite-epafeeds-Slovakia-SHMu epa' title='Slovakia SHMu' ></div> <div class='sprite-epafeeds-Solvenia-Agencija-RS-za-okolje epa' title='Solvenia Agencija RS za okolje' ></div> <div class='sprite-epafeeds-SouthAfrica-DEA epa' title='SouthAfrica DEA' ></div> <div class='sprite-epafeeds-SouthAfrica-RBCAA epa' title='SouthAfrica RBCAA' ></div> <div class='sprite-epafeeds-SouthKorea-AirKorea epa' title='SouthKorea AirKorea' ></div> <div class='sprite-epafeeds-SouthKorea-Seoul epa' title='SouthKorea Seoul' ></div> <div class='sprite-epafeeds-Spain-Asturias epa' title='Spain Asturias' ></div> <div class='sprite-epafeeds-Spain-Canarias-simac epa' title='Spain Canarias simac' ></div> <div class='sprite-epafeeds-Spain-CastillaLeon epa' title='Spain CastillaLeon' ></div> <div class='sprite-epafeeds-Spain-Catalunya epa' title='Spain Catalunya' ></div> <div class='sprite-epafeeds-Spain-Galicia epa' title='Spain Galicia' ></div> <div class='sprite-epafeeds-Spain-GobiernoVasco epa' title='Spain GobiernoVasco' ></div> <div class='sprite-epafeeds-Spain-MadridAmbiente epa' title='Spain MadridAmbiente' ></div> <div class='sprite-epafeeds-Spain-Navara epa' title='Spain Navara' ></div> <div class='sprite-epafeeds-Spain-Zaragoza epa' title='Spain Zaragoza' ></div> <div class='sprite-epafeeds-Suisse-OSTLuft epa' title='Suisse OSTLuft' ></div> <div class='sprite-epafeeds-Sweden-IVL epa' title='Sweden IVL' ></div> <div class='sprite-epafeeds-Sweden-SLB-analysis epa' title='Sweden SLB analysis' ></div> <div class='sprite-epafeeds-Sweden-goteborg epa' title='Sweden goteborg' ></div> <div class='sprite-epafeeds-Sweden-malmo epa' title='Sweden malmo' ></div> <div class='sprite-epafeeds-Sweden-naturvardsverket epa' title='Sweden naturvardsverket' ></div> <div class='sprite-epafeeds-Sweden-umea epa' title='Sweden umea' ></div> <div class='sprite-epafeeds-Switzerland-FOEN epa' title='Switzerland FOEN' ></div> <div class='sprite-epafeeds-Taiwan-EPA epa' title='Taiwan EPA' ></div> <div class='sprite-epafeeds-Thailand-CMU-CCDC epa' title='Thailand CMU CCDC' ></div> <div class='sprite-epafeeds-Thailand-PCD epa' title='Thailand PCD' ></div> <div class='sprite-epafeeds-Turkey-TC-cevre-ve-sehircilik-bakanligi epa' title='Turkey TC cevre ve sehircilik bakanligi' ></div> <div class='sprite-epafeeds-UAE-dubai epa' title='UAE dubai' ></div> <div class='sprite-epafeeds-UAE-ead epa' title='UAE ead' ></div> <div class='sprite-epafeeds-UK-Department-for-environment-food-and-rural-affairs epa' title='UK Department for environment food and rural affairs' ></div> <div class='sprite-epafeeds-UK-GreatAir-Manchester epa' title='UK GreatAir Manchester' ></div> <div class='sprite-epafeeds-UK-London-Kings-College epa' title='UK London Kings College' ></div> <div class='sprite-epafeeds-UK-Northern-Irland-DOE epa' title='UK Northern Irland DOE' ></div> <div class='sprite-epafeeds-UK-Scotland epa' title='UK Scotland' ></div> <div class='sprite-epafeeds-US-AirNow epa' title='US AirNow' ></div> <div class='sprite-epafeeds-US-Alabama epa' title='US Alabama' ></div> <div class='sprite-epafeeds-US-ArizonaDEQ epa' title='US ArizonaDEQ' ></div> <div class='sprite-epafeeds-US-Arkansas epa' title='US Arkansas' ></div> <div class='sprite-epafeeds-US-BAAQMD epa' title='US BAAQMD' ></div> <div class='sprite-epafeeds-US-Clark-County-Nevada epa' title='US Clark County Nevada' ></div> <div class='sprite-epafeeds-US-Colorado epa' title='US Colorado' ></div> <div class='sprite-epafeeds-US-DecLouisiana epa' title='US DecLouisiana' ></div> <div class='sprite-epafeeds-US-Delaware epa' title='US Delaware' ></div> <div class='sprite-epafeeds-US-Hawaii epa' title='US Hawaii' ></div> <div class='sprite-epafeeds-US-Idaho epa' title='US Idaho' ></div> <div class='sprite-epafeeds-US-Illinois epa' title='US Illinois' ></div> <div class='sprite-epafeeds-US-Indiana epa' title='US Indiana' ></div> <div class='sprite-epafeeds-US-Iowa-DNR epa' title='US Iowa DNR' ></div> <div class='sprite-epafeeds-US-Kansas epa' title='US Kansas' ></div> <div class='sprite-epafeeds-US-Kentucky epa' title='US Kentucky' ></div> <div class='sprite-epafeeds-US-LaneCounty epa' title='US LaneCounty' ></div> <div class='sprite-epafeeds-US-MIDEC epa' title='US MIDEC' ></div> <div class='sprite-epafeeds-US-MaineDEQ epa' title='US MaineDEQ' ></div> <div class='sprite-epafeeds-US-Maricopa epa' title='US Maricopa' ></div> <div class='sprite-epafeeds-US-Maryland epa' title='US Maryland' ></div> <div class='sprite-epafeeds-US-Massachusetts epa' title='US Massachusetts' ></div> <div class='sprite-epafeeds-US-Minnesota epa' title='US Minnesota' ></div> <div class='sprite-epafeeds-US-Mississippi epa' title='US Mississippi' ></div> <div class='sprite-epafeeds-US-Missouri epa' title='US Missouri' ></div> <div class='sprite-epafeeds-US-Montana epa' title='US Montana' ></div> <div class='sprite-epafeeds-US-NJDEC epa' title='US NJDEC' ></div> <div class='sprite-epafeeds-US-NYDEC epa' title='US NYDEC' ></div> <div class='sprite-epafeeds-US-NewHampshire epa' title='US NewHampshire' ></div> <div class='sprite-epafeeds-US-North-Carolina epa' title='US North Carolina' ></div> <div class='sprite-epafeeds-US-North-Dakota epa' title='US North Dakota' ></div> <div class='sprite-epafeeds-US-Ohio epa' title='US Ohio' ></div> <div class='sprite-epafeeds-US-Oklahoma epa' title='US Oklahoma' ></div> <div class='sprite-epafeeds-US-Oregon epa' title='US Oregon' ></div> <div class='sprite-epafeeds-US-PimaCounty epa' title='US PimaCounty' ></div> <div class='sprite-epafeeds-US-RhodeIsland epa' title='US RhodeIsland' ></div> <div class='sprite-epafeeds-US-South-Carolina epa' title='US South Carolina' ></div> <div class='sprite-epafeeds-US-SouthDakota epa' title='US SouthDakota' ></div> <div class='sprite-epafeeds-US-StateDepartment epa' title='US StateDepartment' ></div> <div class='sprite-epafeeds-US-Tennessee epa' title='US Tennessee' ></div> <div class='sprite-epafeeds-US-Texas epa' title='US Texas' ></div> <div class='sprite-epafeeds-US-UtahDEQ epa' title='US UtahDEQ' ></div> <div class='sprite-epafeeds-US-Vermont epa' title='US Vermont' ></div> <div class='sprite-epafeeds-US-VirginiaDEQ epa' title='US VirginiaDEQ' ></div> <div class='sprite-epafeeds-US-Washignton-State-Department-of-Ecology epa' title='US Washignton State Department of Ecology' ></div> <div class='sprite-epafeeds-US-WestVirginia epa' title='US WestVirginia' ></div> <div class='sprite-epafeeds-US-Wisconsin-dnrx epa' title='US Wisconsin dnrx' ></div> <div class='sprite-epafeeds-US-WyomingDEC epa' title='US WyomingDEC' ></div> <div class='sprite-epafeeds-USA-AlaskaDEC epa' title='USA AlaskaDEC' ></div> <div class='sprite-epafeeds-USA-CAARB epa' title='USA CAARB' ></div> <div class='sprite-epafeeds-USA-SouthCoastAQMD epa' title='USA SouthCoastAQMD' ></div> <div class='sprite-epafeeds-USA-StateOfGeorgia epa' title='USA StateOfGeorgia' ></div> <div class='sprite-epafeeds-USAFlorida epa' title='USAFlorida' ></div> <div class='sprite-epafeeds-Uk-Welsh epa' title='Uk Welsh' ></div> <div class='sprite-epafeeds-Ukraine-EcoCity epa' title='Ukraine EcoCity' ></div> <div class='sprite-epafeeds-Ukraine-Nipro epa' title='Ukraine Nipro' ></div> <div class='sprite-epafeeds-Vietnam-CEM epa' title='Vietnam CEM' ></div> <div class='sprite-epafeeds-Vietnam-HanoiUNIS epa' title='Vietnam HanoiUNIS' ></div> <div class='sprite-epafeeds-acumar epa' title='acumar' ></div> <div class='sprite-epafeeds-buenos-aires-cuidad epa' title='buenos aires cuidad' ></div> <div class='sprite-epafeeds-cnr-isac100 epa' title='cnr isac100' ></div> <div class='sprite-epafeeds-de-lanuv epa' title='de lanuv' ></div> <div class='sprite-epafeeds-iceland-umhverfisstofnun epa' title='iceland umhverfisstofnun' ></div> <div class='sprite-epafeeds-poland-air-pomerania epa' title='poland air pomerania' ></div> <div class='sprite-epafeeds-poland-wios-armaag epa' title='poland wios armaag' ></div> <div class='sprite-epafeeds-poland-wios-bialystok epa' title='poland wios bialystok' ></div> <div class='sprite-epafeeds-poland-wios-bydgoszcz epa' title='poland wios bydgoszcz' ></div> <div class='sprite-epafeeds-poland-wios-katowice epa' title='poland wios katowice' ></div> <div class='sprite-epafeeds-poland-wios-kielce epa' title='poland wios kielce' ></div> <div class='sprite-epafeeds-poland-wios-krakowie epa' title='poland wios krakowie' ></div> <div class='sprite-epafeeds-poland-wios-lublin epa' title='poland wios lublin' ></div> <div class='sprite-epafeeds-poland-wios-national epa' title='poland wios national' ></div> <div class='sprite-epafeeds-poland-wios-opole epa' title='poland wios opole' ></div> <div class='sprite-epafeeds-poland-wios-poznan epa' title='poland wios poznan' ></div> <div class='sprite-epafeeds-poland-wios-rzeszow epa' title='poland wios rzeszow' ></div> <div class='sprite-epafeeds-poland-wios-szczecin epa' title='poland wios szczecin' ></div> <div class='sprite-epafeeds-poland-wios-warszawa epa' title='poland wios warszawa' ></div> <div class='sprite-epafeeds-poland-wios-wroclaw epa' title='poland wios wroclaw' ></div> <div class='sprite-epafeeds-poland-wios-zgora epa' title='poland wios zgora' ></div> <div class='sprite-epafeeds-portugal-qualar epa' title='portugal qualar' ></div> <div class='sprite-epafeeds-valencia-generalitat-valenciana epa' title='valencia generalitat valenciana' ></div> </div> <center><br>-<svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" version="1" viewBox="0 0 26 26" enable-background="new 0 0 26 26"><path d="M 15.65625 -0.03125 C 14.280846 -0.03760636 12.828752 0.09254274 11.3125 0.40625 C 8.28651 1.0323169 5.7746616 2.1709106 3.96875 3.59375 C 2.3885774 4.8387345 1.3097647 6.3321654 1.0625 7.96875 A 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0 0 7.59375 23.0625 z" color="#000" ></path></svg>-<br><br></center> <p> We are looking for help to translate this website. More information, please check the <a href='https://waqi.info/translate/'>translation</a> page. </p> <br> <center> <a href='/sources/'> <img src='/images/sources/worldmap-2019.03.jpg' style='width:800px;max-width:100%' title='world air quality monitoring stations coverage by the World Air Quality Index project'> </a> </center> <a name='qna'></a> </div></div></div><div class='h1section h1section-divider'><div class='h1section-rainbow'><div></div><div></div><div></div><div></div><div></div></div><h1><div id='h1header5' style='padding:2px;font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;'>Common question & answers</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header5',.88,{maxfs:45}); }; </script><div class='whitebody' style='font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;'><div class='section-outer'><div class='section-content' > <style type="text/css"> ol#faq li u { color: #86c800; text-decoration: none; } ol#faq li { margin-bottom: 15px; } ol#faq { counter-reset: li; margin-left: 0; padding-left: 0; } ol#faq>li { position: relative; margin: 0 0 6px 2em; padding: 4px 8px; list-style: none; border-left: 5px solid #ccc; } ol#faq>li:before { content: counter(li); counter-increment: li; position: absolute; left: -3em; width: 2em; margin-right: 8px; padding: 4px; color: #fff; background: #86c800; font-weight: bold; text-align: center; } @media only screen and (max-width: 800px) { ol#faq>li { margin: 0; margin-top: 20px; } } </style> <ol id='faq'> <li><u> Air Quality Data sources </u> All the Air Quality data seen on World Air Quality Index are the official data from each country respective Environmental Protection Agency (EPA). Data from each EPAs is measured using professional monitoring equipment. The full EPA source list used in World Air Quality Index is available from <a href='/sources/'>sources</a> page. </li> <li><u> Seeing different readings from other websites </u>: This is most likely normal, and due to the fact that different websites use different AQI scales present the data. At World Air Quality Index, we are using the US EPA scale, while other website might use different scales. Check this <a href='/faq/2015-03-20/a-comparison-of-worldwide-air-quality-scales-part-1/'>article</a> for more information. </li> <li> <u> I want to monitor the air quality in my area </u>: As high-end professional stations can be really expensive (more than $10K per stations), the World Air Quality Index project / Earth Sensing Labs has designed specially optimized and affordable monitoring stations costing as low as $200. Please check the <a href='/products/gaia/'>GAIA</a> air quality monitoring station product page. </li> <li><u> I want to add a new station on the map </u>: Provided your monitoring station is qualified (for instance if it is using BAM, TOEM or GAIA technology), then adding a new station on the map is not only simple and straightforward but also completely free. Please refer to this page for the full explanation: <a href='/publishingdata/'>aqicn.org/publishingdata/</a> </li> <li><u> Data quality & real-time validation </u>: The data published on World Air Quality Index is real-time and therefore un-validated at the time of publication. In order to strengthen the quality, a set of real-time AI algorithms are used to detect abnormal data conditions (sparks, low reporting, etc.) and automatically 'disable' data reported from defective stations. </li> <li><u> Historical data access </u>: We are currently investigating with several international institutions (WHO, UN, GEO) the possibility to setup a framework for accessing the historical Air Quality data. If you are from an international institution, organization or university and want to join this effort, then check our <a href='/data-platform/register/'>data platform</a> page. </li> <li><u> API (Application Programming interface) </u>: The World Air Quality Index project is offering a free API for maps, tiles and programmatic JSON access. Check the <a href='/api/'>API</a> page for more information. </li> <li><u> Contributing to the World Air Quality Index project </u>: The project is always looking for more hands to support the activities: For instance, to write articles, to improve our applications, to create new data visualization, to improve the air quality forecast or to translate the website and app to news languages. Check the <a href='/contribute/'>contribute</a> page for more info. </li> <li> <u> Funding </u>: The World Air Quality Index project is independent from any government and any "profit" corporation. It has so far not received any funding from any public nor private entity. The limited income from online ads is used to cover infrastructure cost. </li> <li> <u> Why choosing the U.S. EPA index to harmonize the data? </u> This is mostly for historical reason: When we started in 2007, there was not so many alternative, and the US EPA was actually quite proactive at promoting the idea of clean air, so the choice was natural. Some alternatives, such as the European “Common Air Quality Index” could also have been a good option, but the EEA failed to promote their standard. This won't be a problem for long anyways, since we are now working on a improvement which will allow users to select any scale they want among a list of more than 80 scales! </li> <li> <u> How many cities do you currently provide air quality data for and is the info available on your app in each of them? </u> We are providing the data for 25,000 stations worldwide ~ that’s around 2,000 major cities in 70 countries. The info is available in the app for each of them, but not all of the cities have the “full” set of pollutant monitoring (e.g. PM2.5, PM10, Ozone, NO2, SO2, CO). For example, some only have PM10 or a composite AQI. We are also continuously increasing the coverage, targeting to get 10 to 20% more stations every year. The full list of cities and stations is available from <a href='/city/all/'>this page</a>. </li> <li> <u> Media kit </u> Our public media kit is available from the <a href='/media/'>media kit</a> page. </li> </ol> Any other question, please check the Frequently Asked Question: <a href='/faq/'>aqicn.org/faq/</a>. <br> <br> <center> <img src='https://aqicn.org/images/MadeInBJ.png' alt='made in 北京' border=0> </center> <br> <br> </div></div></div> <div class='h1section h1section-divider'><div class='h1section-rainbow'><div></div><div></div><div></div><div></div><div></div></div><h1><div id='h1header6' style='padding:2px;font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;'>Air Quality Rankings</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header6',.88,{maxfs:45}); }; </script><div class='whitebody' style='font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;'><div class='section-outer'><div class='section-content' ><script>var i18nTexts=(i18nTexts||[]);i18nTexts.push([])</script><script type='text/javascript'>/*webapp:ranking-dyn.3317267553970f89cd31*/var ranking;!function(){"use strict";var n,t,e={},r={};function i(n){var t=r[n];if(void 0!==t)return t.exports;var o=r[n]={id:n,exports:{}};return e[n].call(o.exports,o,o.exports,i),o.exports}i.m=e,i.n=function(n){var t=n&&n.__esModule?function(){return n.default}:function(){return n};return i.d(t,{a:t}),t},i.d=function(n,t){for(var e in t)i.o(t,e)&&!i.o(n,e)&&Object.defineProperty(n,e,{enumerable:!0,get:t[e]})},i.f={},i.e=function(n){return Promise.all(Object.keys(i.f).reduce((function(t,e){return i.f[e](n,t),t}),[]))},i.u=function(n){return n+"-dyn.48921733af23d04ca8d9.js"},i.g=function(){if("object"==typeof globalThis)return globalThis;try{return this||new Function("return this")()}catch(n){if("object"==typeof window)return window}}(),i.o=function(n,t){return Object.prototype.hasOwnProperty.call(n,t)},n={},t="ranking:",i.l=function(e,r,o,a){if(n[e])n[e].push(r);else{var u,c;if(void 0!==o)for(var s=document.getElementsByTagName("script"),d=0;d<s.length;d++){var f=s[d];if(f.getAttribute("src")==e||f.getAttribute("data-webpack")==t+o){u=f;break}}u||(c=!0,(u=document.createElement("script")).charset="utf-8",u.timeout=120,i.nc&&u.setAttribute("nonce",i.nc),u.setAttribute("data-webpack",t+o),u.src=e),n[e]=[r];var l=function(t,r){u.onerror=u.onload=null,clearTimeout(v);var i=n[e];if(delete n[e],u.parentNode&&u.parentNode.removeChild(u),i&&i.forEach((function(n){return n(r)})),t)return t(r)},v=setTimeout(l.bind(null,void 0,{type:"timeout",target:u}),12e4);u.onerror=l.bind(null,u.onerror),u.onload=l.bind(null,u.onload),c&&document.head.appendChild(u)}},i.r=function(n){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(n,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(n,"__esModule",{value:!0})},i.p="/webapp/dist/",function(){var n={ranking:0};i.f.j=function(t,e){var r=i.o(n,t)?n[t]:void 0;if(0!==r)if(r)e.push(r[2]);else{var o=new Promise((function(e,i){r=n[t]=[e,i]}));e.push(r[2]=o);var a=i.p+i.u(t),u=new Error;i.l(a,(function(e){if(i.o(n,t)&&(0!==(r=n[t])&&(n[t]=void 0),r)){var o=e&&("load"===e.type?"missing":e.type),a=e&&e.target&&e.target.src;u.message="Loading chunk "+t+" failed.\n("+o+": "+a+")",u.name="ChunkLoadError",u.type=o,u.request=a,r[1](u)}}),"chunk-"+t,t)}};var t=function(t,e){var r,o,a=e[0],u=e[1],c=e[2],s=0;if(a.some((function(t){return 0!==n[t]}))){for(r in u)i.o(u,r)&&(i.m[r]=u[r]);c&&c(i)}for(t&&t(e);s<a.length;s++)o=a[s],i.o(n,o)&&n[o]&&n[o][0](),n[o]=0},e=self.webpackChunkranking=self.webpackChunkranking||[];e.forEach(t.bind(null,0)),e.push=t.bind(null,e.push.bind(e))}();var o={};i.r(o),function(n){n||(n="ranking-"+Date.now(),document.write("<div id='"+n+"'></div>"));var t=document.getElementById(n);!function(n,t){var e=!1;n.innerHTML='<center><div class="aqspinner3"><div class="r1"></div><div class="r2"></div><div class="r3"></div><div class="r4"></div><div class="r5"></div></div></center>',new IntersectionObserver((function(r){r.forEach((function(r){!e&&r.intersectionRatio>0&&(e=!0,t().catch((function(t){n.innerHTML="<center>Ooops... Sorry, something wrong happended<br><br><small>".concat(t,"</small></center>")})))}))})).observe(n)}(t,(function(){return i.e("ranking-module").then(i.bind(i,4538)).then((function(n){n.showRanking?n.showRanking(t):t.innerHTML="\n\t\t\t\t\t<center>\n\t\t\t\t\t\tPlease visit <a href='https://aqicn.org/rankings/'>aqicn.org/rankings/</a> for the latest Air Quality rankings\n\t\t\t\t\t</center>\n\t\t\t\t\t"}))}))}(),ranking=o}();</script></div></div></div><a name="infoaqi"></a><div class='h1section h1section-divider'><div class='h1section-rainbow'><div></div><div></div><div></div><div></div><div></div></div><h1><div id='h1header7' style='padding:2px;font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;'>About the Air Quality and Pollution Measurement:</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header7',.88,{maxfs:45}); }; </script><div class='whitebody' style='font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;'><div class='section-outer'><div class='section-content' > <center>About the Air Quality Levels<br> <br> <style type="text/css"> #legend-full table.infoaqitable { line-height: 1.5; background-color: white; max-width: 1000px; width: 95%; margin: 0px; border: 1px solid black; cursor: pointer; } #legend-full table.infoaqitable td { padding: 5px; font-size: 15px; text-shadow: none; } #legend-full .aqiwtxt { color: #ffffff; } #legend-full .aqibtxt { color: #000000; } @media only screen and (max-width: 800px) { #legend-full table.infoaqitable { width: 98%; } } @media only screen and (max-width: 800px) { #legend-full table.infoaqitable td { display: block; } #legend-full table.infoaqitable td:nth-child(1) { display: inline-block; font-size: 1.2em; } #legend-full table.infoaqitable td:nth-child(2) { display: inline-block; font-weight: 800; font-size: 1.2em; } } </style> <div id='legend-full' onclick='window.location="/scale/"'> <table class="infoaqitable cautionary"> <thead> <tr> <td>AQI</td> <td>Air Pollution Level</td> <td>Health Implications</td> <td>Cautionary Statement (for PM2.5)</td> </tr> </thead> <tr style="background-color:#009966;"> <td class='aqiwtxt' nowrap="true">0 - 50</td> <td class='aqiwtxt'>Good</td> <td class='aqiwtxt'>Air quality is considered satisfactory, and air pollution poses little or no risk</td> <td class='aqiwtxt'>None</td> </tr> <tr style="background-color:#ffde33" class='aqibtxt'> <td class='aqibtxt' nowrap="true">51 -100</td> <td class='aqibtxt'>Moderate</td> <td class='aqibtxt'>Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.</td> <td class='aqibtxt'>Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.</td> </tr> <tr style="background-color:#ff9933;"> <td class='aqibtxt' nowrap="true">101-150</td> <td class='aqibtxt'>Unhealthy for Sensitive Groups</td> <td class='aqibtxt'>Members of sensitive groups may experience health effects. The general public is not likely to be affected.</td> <td class='aqibtxt'>Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.</td> </tr> <tr style="background-color:#cc0033;"> <td class='aqiwtxt' nowrap="true">151-200</td> <td class='aqiwtxt'>Unhealthy</td> <td class='aqiwtxt'>Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects</td> <td class='aqiwtxt'>Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion</td> </tr> <tr style="background-color:#660099;"> <td class='aqiwtxt' nowrap="true">201-300</td> <td class='aqiwtxt'>Very Unhealthy</td> <td class='aqiwtxt'>Health warnings of emergency conditions. The entire population is more likely to be affected.</td> <td class='aqiwtxt'>Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.</td> </tr> <tr style="background-color:#7e0023;"> <td class='aqiwtxt' nowrap="true">300+</td> <td class='aqiwtxt'>Hazardous</td> <td class='aqiwtxt'>Health alert: everyone may experience more serious health effects</td> <td class='aqiwtxt'>Everyone should avoid all outdoor exertion</td> </tr> </table></div><br>To know more about Air Quality and Pollution, check the <a href='http://en.wikipedia.org/wiki/Air_quality'>wikipedia Air Quality topic</a> or the <a href='http://www.airnow.gov/index.cfm?action=aqibasics.aqi'>airnow guide to Air Quality and Your Health</a>.<br><br>For very useful health advices of Beijing Doctor Richard Saint Cyr MD, check <a href='http://www.myhealthbeijing.com/'>www.myhealthbeijing.com</a> blog.<br><br></center></div></div></div> <center> <br>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-0281575029452656" data-ad-slot="2455076269" data-ad-format="auto"></ins> <script>(adsbygoogle = window.adsbygoogle || []).push({});</script> <style type='text/css'> .usage-notice { line-height:1.5; max-width:95%; width:1000px; margin-top:10px; padding:5px; font-size: 15px; background-color:#ffffff; text-shadow: 1px 1px 1px white; -webkit-box-shadow: 1px 1px 8px -3px rgba(0,0,0,0.3); } </style> <div class="textshadowwhite usage-notice" style=''> <b>Usage Notice</b>: All the Air Quality data are unvalidated at the time of publication, and due to quality assurance these data may be amended, without notice, at any time. 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height: 0; border: 7px solid transparent;top:0px;border-top: 7px solid #fff;position:relative;;margin-left:100px;'></div></div> </div> <link rel='stylesheet' type='text/css' href='https://aqicn.org/air-cache/generic/scripts/dist/navmenu.css?_=20250118.191236' /><script async src='https://aqicn.org/air-cache/generic/scripts/dist/navmenu.js?_=20250121.194619' type='text/javascript'></script> <script type="text/javascript"> fitLine(".link",.9); </script> <script type="text/javascript"> function initTime() { if (isMobileUA) return; function setTimeText() { var minutes = new Date().getMinutes(); var hours = new Date().getHours(); var time = ( hours < 10 ? "0" : "" ) + hours; time += ":"+( minutes < 10 ? "0" : "" ) + minutes; var ot = document.getElementById("ClockTime"); if (ot) ot.innerHTML = time; } setInterval( function() { setTimeText() }, 1000*60*15 ); setTimeText(); }; aqi18n.register('aqi-implication-0-50',"Air quality is considered satisfactory, and air pollution poses little or no risk");aqi18n.register('aqi-level-0-50',"Good");aqi18n.register('aqi-implication-50-100',"Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.");aqi18n.register('aqi-level-50-100',"Moderate");aqi18n.register('aqi-implication-100-150',"Members of sensitive groups may experience health effects. 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