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stroke-miterlimit: 10; fill: none; fill-rule: nonzero; opacity: 1;" transform="translate(1.4065934065934016 1.4065934065934016) scale(2.81 2.81)" ><circle cx="45" cy="45" r="45" style="stroke: none; stroke-width: 1; stroke-dasharray: none; stroke-linecap: butt; stroke-linejoin: miter; stroke-miterlimit: 10; fill: rgb(255,255,255); fill-rule: nonzero; opacity: 1;" transform=" matrix(1 0 0 1 0 0) "/><path d="M 75.011 45 c -0.134 -3.624 -3.177 -6.454 -6.812 -6.331 c -1.611 0.056 -3.143 0.716 -4.306 1.823 c -5.123 -3.49 -11.141 -5.403 -17.327 -5.537 l 2.919 -14.038 l 9.631 2.025 c 0.268 2.472 2.483 4.262 4.955 3.993 c 2.472 -0.268 4.262 -2.483 3.993 -4.955 s -2.483 -4.262 -4.955 -3.993 c -1.421 0.145 -2.696 0.973 -3.4 2.204 L 48.68 17.987 c -0.749 -0.168 -1.499 0.302 -1.667 1.063 c 0 0.011 0 0.011 0 0.022 l -3.322 15.615 c -6.264 0.101 -12.36 2.025 -17.55 5.537 c -2.64 -2.483 -6.801 -2.36 -9.284 0.291 c -2.483 2.64 -2.36 6.801 0.291 9.284 c 0.515 0.481 1.107 0.895 1.767 1.186 c -0.045 0.66 -0.045 1.32 0 1.98 c 0 10.078 11.745 18.277 26.23 18.277 c 14.485 0 26.23 -8.188 26.23 -18.277 c 0.045 -0.66 0.045 -1.32 0 -1.98 C 73.635 49.855 75.056 47.528 75.011 45 z M 30.011 49.508 c 0 -2.483 2.025 -4.508 4.508 -4.508 c 2.483 0 4.508 2.025 4.508 4.508 s -2.025 4.508 -4.508 4.508 C 32.025 53.993 30.011 51.991 30.011 49.508 z M 56.152 62.058 v -0.179 c -3.199 2.405 -7.114 3.635 -11.119 3.468 c -4.005 0.168 -7.919 -1.063 -11.119 -3.468 c -0.425 -0.515 -0.347 -1.286 0.168 -1.711 c 0.447 -0.369 1.085 -0.369 1.544 0 c 2.707 1.98 6.007 2.987 9.362 2.83 c 3.356 0.179 6.667 -0.783 9.407 -2.74 c 0.492 -0.481 1.297 -0.47 1.779 0.022 C 56.655 60.772 56.644 61.577 56.152 62.058 z M 55.537 54.34 c -0.078 0 -0.145 0 -0.224 0 l 0.034 -0.168 c -2.483 0 -4.508 -2.025 -4.508 -4.508 s 2.025 -4.508 4.508 -4.508 s 4.508 2.025 4.508 4.508 C 59.955 52.148 58.02 54.239 55.537 54.34 z" style="stroke: none; stroke-width: 1; stroke-dasharray: none; stroke-linecap: butt; stroke-linejoin: miter; stroke-miterlimit: 10; fill: #25a1de; fill-rule: nonzero; opacity: 1;" transform=" matrix(1 0 0 1 0 0) " stroke-linecap="round" /></g></svg></a><script>try{tlite.enable(document.getElementById('share-reddit'),{text:"<div style='font-size:120%'>Share on reddit:<\/div>Guide to publishing Air Quality data on the World Air Quality Index project<br>(https:\/\/aqicn.org\/publishingdata\/)"});}catch(e){}</script></div><style>.ui-share-btns { display: block; margin: 0; vertical-align: middle; } .ui-share-btns svg { height: 20px; vertical-align: middle; fill: white; } .ui-share-btn { background-color: #25a1de; color: rgba(255, 255, 255, .8); font-size: 15px; line-height: 20px; display: inline-block; text-align: center; border: 1px solid #0086c8; cursor: pointer; border-radius: 4px; padding: 3px 5px; margin: 3px; max-width: 800px; min-width: 30px; } .ui-share-btn:first-child { margin-left: 0px; } .ui-share-btn:hover { background-color: #f8f8f8; border-color: #adadad; text-decoration: none; color: black; } .ui-share-btn:hover svg { fill: black; } .ui-share-btn:hover svg g { fill: black; } .ui-share-btn a:hover { text-decoration: none; }</style><i style='color:#888;font-size:13px;word-break: break-all;'>Share: <a href='https://aqicn.org/publishingdata/'>aqicn.org/publishingdata/</a></i><br></div><div style='clear:both;margin-bottom:10px;'></div> <style type="text/css"> u { color: #0086c8; text-decoration: none; font-weight: bold; } </style> <div style='float:right;padding-left:10px;'><img src='/images/logo/regular.png' height=80></div> <p class='bigletter'> Publishing data on the <a href='/home/'>World Air Quality Index</a> project is free for every one. But it is also simple and straightforward: All you need to add data on the World Air Quality Index map is to provide a feed URL with the real-time information about the monitoring stations (name and location), the pollutants being measured and the real-time readings (together with the units, for instance milligrams or ppb). </p> <br> <style type='text/css'>section {margin-top:20px;margin-bottom: 80px;}@media only screen and (max-width: 800px) { border-top: 1px solid #ccc;}@media only screen and (min-width: 800px) { section {padding-left: 20px;border-left: 3px solid #f8f8f8;}}</style><h2><p>Qualification Criteria</p></h2><section><p> Note that, historically, the data published on the World Air Quality Index maps (aqicn.org and waqi.info) was only the official data provided by each country respective Environmental Protection Agency (see the <a href='/sources/'>full EPA list</a>). </p> <p> The official data refers to data monitored using professional BAM, TEOM and similar high-cost air quality monitoring stations. Those stations are not trivial to use, and do require constant maintenance and calibration by the EPA professional field-engineering teams. </p> <p> However, nowadays, more affordable laser-scattering-based air quality monitoring stations are widely use as companion to the official air quality monitoring stations. Those more affordable station can cost 1000 times less than the BAM and TOEM station. </p> <p> We do recommend to use the semi-professional <a href='/gaia/'>GAIA</a> air quality monitoring stations for this purpose. But we also accept data from other stations. Nevertheless, such particle counter-based stations need to report enhanced data feed with additional quality controls (see <a href='#quality-control'>quality control</a> section). </p> </section><h2><p>Feed format</p></h2><section><svg style="float:right;margin:10px;" width=80 height=80 version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 512 512" xml:space="preserve" fill="#888"> <polygon points="216,40 216,56 232,56 232,96 248,96 248,56 264,56 264,40 " /> <path d="M471.998,104c0-2.047-0.781-4.094-2.342-5.656l-96-96c-1.5-1.499-3.534-2.342-5.654-2.342c-0.001,0-0.001,0-0.002,0V0H64 C50.745,0,40,10.745,40,24v464c0,13.255,10.745,24,24,24h384c13.255,0,24-10.745,24-24V104H471.998z M376,27.312L444.688,96H384 c-4.418,0-8-3.582-8-8V27.312z M456,488c0,4.418-3.582,8-8,8H64c-4.418,0-8-3.582-8-8V24c0-4.418,3.582-8,8-8h296v72 c0,13.255,10.745,24,24,24h72V488z" /> <path d="M416,160H96c-4.418,0-8,3.582-8,8v288c0,4.418,3.582,8,8,8h320c4.418,0,8-3.582,8-8V168C424,163.582,420.418,160,416,160z M408,400h-56v16h56v32H104v-32h56v-16h-56V176h304V400z" /> <path d="M256,208c-53.832,0-96,28.112-96,64v80c0,35.888,42.168,64,96,64c53.832,0,96-28.112,96-64v-80 C352,236.112,309.832,208,256,208z M336,352c0,26.016-36.632,48-80,48c-43.368,0-80-21.984-80-48v-44.164 C193.06,324.938,222.234,336,256,336s62.94-11.062,80-28.164V352z M256,320c-43.368,0-80-21.984-80-48s36.632-48,80-48 c43.368,0,80,21.984,80,48S299.368,320,256,320z" /> <path d="M256,240c-26.912,0-48,14.056-48,32c0,17.944,21.088,32,48,32v-16c-18.312,0-32-8.448-32-16s13.688-16,32-16 s32,8.448,32,16h16C304,254.056,282.912,240,256,240z" /> <path d="M312,40h-16c-0.221-0.005-0.442-0.005-0.663,0c-8.653,0.183-15.52,7.347-15.337,16v40h16V80h16v16h16V56 c0.005-0.221,0.005-0.442,0-0.663C327.817,46.684,320.654,39.817,312,40z M312,64h-16v-8h16V64z" /> <path d="M184,40h-16c-0.221-0.005-0.442-0.005-0.663,0c-8.653,0.183-15.52,7.347-15.337,16v40h16V80h16v16h16V56 c0.005-0.221,0.005-0.442,0-0.663C199.817,46.684,192.654,39.817,184,40z M184,64h-16v-8h16V64z" /> <path d="M120,40H96c-4.418,0-8,3.582-8,8v40c0,4.418,3.582,8,8,8h24c0.221,0.005,0.442,0.005,0.663,0 c8.653-0.183,15.52-7.347,15.337-16V56c0.005-0.221,0.005-0.442,0-0.663C135.817,46.684,128.654,39.817,120,40z M120,80h-16V56h16 V80z" /> </svg> <p> Since almost every country has its own reporting format, the World Air Quality Index project can accept any kinds of formats for the feeds: They can be in CSV, JSON or just plain text or HTML format. You can find at the bottom of this page 3 example for CSV, HTML and JSON. </p> <p> For reference, check the official feeds for <a href='http://www.haze.gov.sg/haze-updates/pollutant-concentrations'>Singapore</a> or <a href='http://www.luchtmeetnet.nl/'>Netherlands</a> and notice that despite they are all different, they can be ingested by our system. </p> <p> For the instant air particle counters, you can either report the data via our own web server, or via the <a href='https://api.thingspeak.com/channels/402750/'>thingspeak</a>. </p> </section><h2><p>Data ingestion</p></h2><section><p> The World Air Quality Index system will take care of regularly checking the data from the feed, and each time an update is available, it will be processed, converted to the US EPA scale AQI values, and publish on the World Air Quality Index website within minutes. </p> <p> Also, although only PM<sub>2.5</sub>, PM<sub>10</sub>, Ozone, NO<sub>2</sub>, SO<sub>2</sub> and CO Air Quality data is published, the system does collect more pollutants for forecasting purpose: Benzen, Toluene, Ethylbenzene, NO<sub>x</sub>, THC, NMHC, PM<sub>1</sub>, Formaldehyde, Mercury, Ammonia, Methane, Hydrogen sulfide, Nitrous acid, Phenol, Naphthalene, paraxylene (p-Xylen), metaxylene (m-Xylen), etc.. </p> <p> It is also possible to publish meteorological data: Temperature, Atmospheric Pressure, Humidity, Precipitation, Wind Speed, Wind Direction, Solar Radiation and UVI. If not provided, we will use other relevant meteorologic information sources. </p> </section><style type="text/css"> table.datainput { border: 2px solid black; width: 100%; border-spacing: 1px; background: white; } table.datainput th { font-size: 13px; border-right: solid 1px #DEDEDE; background: #0086c8; padding: 5px; color: white; } table.datainput tr td { background-color: #fff; color: #333; line-height: 22px; } table.datainput td { margin: 0px; padding: 3px; font-size: 15px; } .datainput td, .datainput th { text-align: center; border: 1px solid #d5d5d5; padding: 5px; } table.datainput tr:hover { background: #9AC9FF; } pre { font-size: 12px; background-color: ghostwhite; border: 1px solid silver; padding: 10px 20px; margin: 20px; } .json-key { color: brown; } .json-value { color: navy; } .json-string { color: olive; } .example { border: 1px solid black; padding: 10px; margin: 10px; background: #eee; } </style> <div style='height:20px;'></div></div></center><div style='background-color:#f8f8f8'><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;;'>Feed Example (CSV format)</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header6',.88,{maxfs:45}); }; </script></div><center><div class='section-content' ><pre style='overflow-x: scroll;'> #ID: ID_BEI_DC<br> #City: Beijing<br> #Station: Dongcheng<br> #Name: 东城东四<br> #Latitude: 39.929<br> #Longitude: 116.417<br> #Timezone: +0800<br> Date,PM10,PM25,CO,Ozone,Sulphur Dioxide,Nitrogen Dioxide,AmbientTemperature,RelativeHumidity,WindDirection,WindSpeed,Pressure,RainGauge<br> Unit,ug/m3,ug/m3,ppm,µg/m3,µg/m3,µg/m3,°C,%,°,m/s,hPa,mm<br> 10/29/2016 13:00,16,3,,58,10,3,32,66,200,3,1001,0<br> 10/29/2016 14:00,19,8,,57,9,4,32,64,197,2,1001,0<br> 10/29/2016 15:00,15,9,,52,47,17,30,72,190,2,1001,0<br> 10/29/2016 16:00,31,19,,52,34,17,30,75,191,2,1001,0<br> 10/29/2016 17:00,31,17,,49,49,19,29,75,194,1,1002,0<br> 10/29/2016 18:00,37,18,,45,55,25,29,73,183,1,1003,0<br> 10/29/2016 19:00,24,13,,40,21,19,29,80,65,1,1004,0<br> 10/29/2016 20:00,39,22,,44,4,16,28,85,7,1,1005,0<br> 10/29/2016 21:00,24,16,,43,3,7,28,85,10,1,1005,0<br> </pre> <div style='height:20px;'></div></div></center><div style='background-color:#f8f8f8'><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;;'>Feed Example (HTML format)</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header7',.88,{maxfs:45}); }; </script></div><center><div class='section-content' ><p> This is an example based on an HTML format (direct url: <a href='/publishingdata/html/'>publishingdata/html/</a>): </p> <div class='example'> <b>Station list:</b> <br> <div style='overflow-x:scroll'> <table class='datainput'> <tr> <th>Station ID <th>City or County Name <th>Station Name <th>Local name (optional) <th>Latitude/Longitude <th>Timezone (optional) <tr> <td>ID_BEI_DC <td>Beijing <td>Dongcheng <td>东城东四 <td>39.929/116.417 <td>+0800 <tr> <td>ID_BEI_WP <td>Beijing <td>West Park <td>西城官园 <td>39.929/116.339 <td>+0800 <tr> <td>ID_BEI_OP <td>Beijing <td>Olympic Park <td>朝阳奥体中心 <td>39.982/116.397 <td>+0800 <tr> <td>... <td>... <td>... <td>... <td>... <td>... </tr> </table> </div> <small> <ul> <li> The "<i translate="no">Station ID</i>" is the unique identifier for each station, and it can just be a number (eg ID8373), or the concatenation of station city and station name (eg. "Beijing/Dongcheng"). </li> <li> By default, the station will be available via the url <u translate="no">/city/<i translate="no">country-name</i>/<i translate="no">city-name</i>/<i translate="no">station-name</i></u>. </li> <li> The "<i translate="no">Station Name</i>" must use latin characters, so the optional "<i translate="no">Local Name</i>" can be provided to localize the webpage. </li> </ul> </small> <br> <b>Real-time pollutant list:</b> <br> <div style='overflow-x:scroll;'> <table class='datainput'> <tr> <th>Station ID <th>Pollutant <th>Unit <th>Update time <th>Value <th>Averaging <tr> <td>ID_BEI_DC <td>PM10 <td>mg/m3 <td>2025-03-20T20:00:00+09:00<td>27.8 <td>1 hour <tr> <td>ID_BEI_DC <td>PM25 <td>mg/m3 <td>2025-03-20T20:00:00+09:00<td>10.8 <td>1 hour <tr> <td>ID_BEI_DC <td>Ozone <td>mg/m3 <td>2025-03-20T20:00:00+09:00<td>15.2 <td>1 hour <tr> <td>ID_BEI_DC <td>Ozone <td>mg/m3 <td>2025-03-20T20:00:00+09:00<td>18.2 <td>8 hours <tr> <td>ID_BEI_DC <td>Temperature <td>Celcius <td>2025-03-20T20:00:00+09:00<td>22.3 <td>1 hour <tr> <td>ID_BEI_WP <td>PM10 <td>mg/m3 <td>2025-03-20T20:00:00+09:00<td>27.8 <td>1 hour <tr> <td>ID_BEI_WP <td>PM25 <td>mg/m3 <td>2025-03-20T20:00:00+09:00<td>10.8 <td>1 hour <tr> <td>ID_BEI_WP <td>SO2 <td>ppb <td>2025-03-20T20:00:00+09:00<td>15.2 <td>1 hour <tr> <td>ID_BEI_WP <td>Humidiy <td>% <td>2025-03-20T20:00:00+09:00<td>88 <td>1 hour <tr> <td>... <td>... <td>... <td>... <td>... <td> </tr> </table> </div> <small> <ul> <li> The "<i translate="no">Averaging</i>" column is use to specify the duration of the value. The most common averaging is 1 hour. It is also the preferred one, as our backend system will automatically do the 8 hour averaging computation for the Ozone and Carbon Monoxide. </li> <li>In the case the readings are provided more frequently than every hour (for instance every 30 minutes or 10 minutes), you can either provide the raw readings for the given period, or just the hourly averaging: Our back-end system will anyway process data even between the hour. </li> </ul> </small> </div> <div style='height:20px;'></div></div></center><div style='background-color:#f8f8f8'><div class='h1section h1section-divider'><div class='h1section-rainbow'><div></div><div></div><div></div><div></div><div></div></div><h1><div id='h1header8' style='padding:2px;;'>Feed Example (JSON format)</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header8',.88,{maxfs:45}); }; </script></div><center><div class='section-content' ><p> This is an example based on JSON format (direct url: <a href='/publishingdata/json/'>/publishingdata/json/</a>) </p> <div class='example'> <div style='overflow-x:scroll;'> <pre><div id='json'>..</div></pre> </div> </div> <a name='quality-control'></a> <div style='height:20px;'></div></div></center><div style='background-color:#f8f8f8'><div class='h1section h1section-divider'><div class='h1section-rainbow'><div></div><div></div><div></div><div></div><div></div></div><h1><div id='h1header9' style='padding:2px;;'>Quality Control for particle counter sensors</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header9',.88,{maxfs:45}); }; </script></div><center><div class='section-content' ><p> For instant particule counters, such as the <a href='/sensor/'>Plantower PMS</a> or <a href='/sensor/'>Nova SDS</a>, which provide instantaneous (in few seconds) particulate matter readings, the data is usually reported every minute. This data is usually computed based on several "averaged" readings from a one or two minute period. </p> <p> The use of averaging is however not good enough, especially for failing sensors (or sensor close of end-of-life). Therefore, for such sensors, it is required to provide additional metrics, such as the median, min, max, and standard-deviation. See for example the <code class='code-snippet-inline'>readings</code> object in the below JSON data feed. </p> <pre><div id='jsonqa'>..</div></pre> <p> You can use the following arduino-compatible code to collect those metrics: </p> <pre style='overflow-x: scroll;'><code>class Accumulator { #define OUTPUT_BUFFER_SIZE 120 char buffer[OUTPUT_BUFFER_SIZE]; #define MAXACCVALUES 120 int vals[MAXACCVALUES]; int count = 0; public: Accumulator() { reset(); } void reset() { count = 0; for (int i=0;i< MAXACCVALUES;i++) { vals[i]=0; } } bool hasData() { return count!=0; } std::string output() { if (!hasData()) return std::string("{}"); sprintf(buffer, OUTPUT_BUFFER_SIZE, "{\"min\":%d,\"max\":%d,\"median\":%d,\"average\":%.1f,\"stddev\":%.1f,\"count\":%d}", vmin(), vmax(), median(), average(), stddev(), count); return std::string(buffer); } void add(int val) { if (count==MAXACCVALUES-1) { for (int i = 0; i < MAXACCVALUES - 1; i++) { vals[i] = vals[i + 1]; } count --; } vals[count++]=val; } float stddev() { if (!hasData()) return -1; int u =avg(); int t = 0; for (int i=0;i<count;i++) { t+=(vals[i]-u)*(vals[i]-u); } return sqrt(t)/count; } int median() { if (!hasData()) return -1; for (int i=0;i<count;i++) { for (int j=0;j<i;j++) { if (vals[i]>vals[j]) { float t = vals[j]; vals[j]=vals[i]; vals[i]=t; } } } return vals[count/2]; } float avg() { if (!hasData()) return -1; float t = 0; for (int i=0;i<count;i++) t+=vals[i]; return t/count; } float vmin() { if (!hasData()) return -1; float t = vals[0]; for (int i=0;i<count;i++) { if (t>vals[i]) { t=vals[i]; } } return t; } float vmax() { if (!hasData()) return -1; float t = vals[0]; for (int i=0;i<count;i++) { if (vals[i]>t) { t=vals[i]; } } return t; } };</code></pre> <script> function initPageNow() { if (!library) var library = {}; library.json = { replacer: function(match, pIndent, pKey, pVal, pEnd) { var key = '<span class=json-key>'; var val = '<span class=json-value>'; var str = '<span class=json-string>'; var r = pIndent || ''; if (pKey) r = r + key + pKey.replace(/[": ]/g, '') + '</span>: '; if (pVal) r = r + (pVal[0] == '"' ? str : val) + pVal + '</span>'; return r + (pEnd || ''); }, prettyPrint: function(obj) { var jsonLine = /^( *)("[\w]+": )?("[^"]*"|[\w.+-]*)?([,[{])?$/mg; return JSON.stringify(obj, null, 3) .replace(/&/g, '&').replace(/\\"/g, '"') .replace(/</g, '<').replace(/>/g, '>') .replace(jsonLine, library.json.replacer); } }; var aqidata = [{ id: "BEI001", cityName: "Beijing", stationName: "Dongcheng", localName: "东城东四", latitude: 39.929, longitude: 116.417, pollutants: [{ pol: "PM2.5", unit: "mg/m3", time: "2025-03-20T20:00:00+09:00", value: 18.7, averaging: "1 hour" }, { pol: "Ozone", unit: "ppb", time: "2025-03-20T20:00:00+09:00", value: 12.1, averaging: "1 hour" } ] }, { id: "BEI002", cityName: "Beijing", stationName: "WestPark", localName: "西城官园", latitude: 39.929, longitude: 116.417, pollutants: [{ pol: "PM10", unit: "mg/m3", time: "2025-03-20T20:00:00+09:00", value: 18.7, averaging: "1 hour" }, { pol: "Humidity", unit: "%", time: "2025-03-20T20:00:00+09:00", value: 88.8, averaging: "1 hour" } ] }, ]; var qaaqidata = [{ id: "BEI001", cityName: "Beijing", stationName: "Dongcheng", localName: "东城东四", latitude: 39.929, longitude: 116.417, pollutants: [{ pol: "PM2.5", unit: "mg/m3", time: "2025-03-20T19:47:00+09:00", averaging: "1 minute", readings: { median: 18.4, average: 18.8, stddev: 0.3, min: 16.9, max: 19.3, count: 60 } }] }]; document.getElementById("json").innerHTML = library.json.prettyPrint(aqidata); document.getElementById("jsonqa").innerHTML = library.json.prettyPrint(qaaqidata); } initPageNow(); </script> </div></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='h1header2' style='padding:2px;font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;'>Inquiry Form</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header2',.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' ><br> <div style='float:right;font-size:80%;color:#888;width:200px;max-width:33%;'> <img src='/air/view/faq/images/feed-upload/BAM.png' style='width:100%'><br> MetOne BAM 1020 station<br>  </div> <p> Publishing data on the World Air Quality Index maps (aqicn.org and waqi.info) is free and simple. </p> <p> Both professional and DIY air quality monitoring stations are accepted. </p> <p> However DIY stations, such as "luftdaten", go through an additional data quality control, to ensure <a href='/faq/using-statistical-distances-for-real-time-sensor-networks-validation/'>high quality data</a>. </p> <p> Once your data is validated, you will get a dedicated page for your station where you can see the real-time data, the Air Quality and weather forecast, as well as the historical data - all for free. </p> <p> If you do not have any monitoring station, and would like to get one, check our <a href='/gaia/'>GAIA</a> Air Quality monitoring stations. If you prefer a DIY station, check the <a href='/gaia/a08/'>GAIA A08</a>. </p> <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 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 16.59375 C 14.906411 16.860439 12.500325 16.269357 10.78125 15.5 C 14.30154 15.772761 18.245209 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y="71" /> <rect height="2" width="2" x="80" y="71" /> <path d="M35.001,51.64l1.961-0.393c-0.831-4.156-4.053-7.378-8.209-8.209l-0.393,1.961C31.723,45.671,34.329,48.277,35.001,51.64z" /> <path d="M30.082,54.234l1.898-0.633c-0.874-2.622-2.96-4.708-5.582-5.582l-0.633,1.898C27.794,50.593,29.407,52.206,30.082,54.234z" /> <path d="M41.948,48.583C40.3,43.637,36.363,39.7,31.417,38.052l-0.633,1.896c4.353,1.451,7.816,4.915,9.268,9.268L41.948,48.583z" /> <path d="M6,16h14c2.209,0,4-1.791,4-4c0-2.209-1.791-4-4-4c-0.353,0-0.689,0.06-1.015,0.146C18.987,8.096,19,8.05,19,8 c0-2.761-2.239-5-5-5S9,5.239,9,8c0,0.047,0.013,0.091,0.014,0.137C7.943,8.41,7.055,9.112,6.526,10.053C6.355,10.023,6.18,10,6,10 c-1.657,0-3,1.343-3,3S4.343,16,6,16z" /> <path d="M48,78l-5-0.625v-3.444c3.945-0.493,7-3.852,7-7.931c-4.079,0-7.438,3.055-7.931,7h-0.138c-0.493-3.945-3.852-7-7.931-7 c0,4.079,3.055,7.438,7,7.931v3.194L40,77l-5,2h-3l-3,1h-2v6h-1.168V74c0-0.197-0.059-0.391-0.168-0.555L24,70.949V63 c0-3.314-2.686-6-6-6s-6,2.686-6,6v7.949l-1.664,2.496c-0.109,0.164-0.168,0.357-0.168,0.555v12H9v-6H7l-5-2v16h92V80H52L48,78z M17,62h2v2h-2V62z M12,90h-2v-2h2V90z M13,80v6h-1V74l0.818-1H17v13h-1v-6H13z M19,90h-2v-2h2V90z M20,80v6h-1V73h4.052L24,74.303 V86h-1v-6H20z M25.832,90h-2v-2h2V90z M44,90h-4v-2h4V90z M86,87h4v2h-4V87z M68,84h5v2h-5V84z" /> </svg> <p> Either you have a known Air Quality monitoring station (IQAir, Oizom, Luftdaten, Sensor Community, PurpleAir, U-Rad, LUN, ...), or a known Weather Station with an air quality sensor module (Weather Link, Eco-Witt, Ambient Weather...). In which case, you only need to tell us your station details, such as the ID/Name. We already have adapters for those stations. </p> <br><br> <svg style='height:80px;float:left;padding-right:10px;' viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg"> <g id="server"> <path d="m11 36h-4a1 1 0 0 0 -1 1v4a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1v-4a1 1 0 0 0 -1-1zm-1 4h-2v-2h2z" /> <path d="m19 36h-4a1 1 0 0 0 -1 1v4a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1v-4a1 1 0 0 0 -1-1zm-1 4h-2v-2h2z" /> <path d="m22 40h14v2h-14z" /> <path d="m38 40h2v2h-2z" /> <path d="m11 20h-4a1 1 0 0 0 -1 1v4a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1v-4a1 1 0 0 0 -1-1zm-1 4h-2v-2h2z" /> <path d="m19 20h-4a1 1 0 0 0 -1 1v4a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1v-4a1 1 0 0 0 -1-1zm-1 4h-2v-2h2z" /> <path d="m7 58h4a1 1 0 0 0 1-1v-4a1 1 0 0 0 -1-1h-4a1 1 0 0 0 -1 1v4a1 1 0 0 0 1 1zm1-4h2v2h-2z" /> <path d="m15 58h4a1 1 0 0 0 1-1v-4a1 1 0 0 0 -1-1h-4a1 1 0 0 0 -1 1v4a1 1 0 0 0 1 1zm1-4h2v2h-2z" /> <path d="m22 52h14v2h-14z" /> <path d="m38 52h2v2h-2z" /> <path d="m22 56h14v2h-14z" /> <path d="m38 56h2v2h-2z" /> <path d="m59 2h-34a3.009 3.009 0 0 0 -3 3v11h-17a3.009 3.009 0 0 0 -3 3v8a3.009 3.009 0 0 0 3 3h1v2h-1a3.009 3.009 0 0 0 -3 3v8a3.009 3.009 0 0 0 3 3h1v2h-1a3.009 3.009 0 0 0 -3 3v8a3.009 3.009 0 0 0 3 3h36a3.009 3.009 0 0 0 3-3v-8a3.009 3.009 0 0 0 -3-3h-1v-2h1a3.009 3.009 0 0 0 3-3v-5h15a3.009 3.009 0 0 0 3-3v-30a3.009 3.009 0 0 0 -3-3zm-54 26a1 1 0 0 1 -1-1v-8a1 1 0 0 1 1-1h17v10zm17 2v2h-8v-2zm-10 0v2h-4v-2zm29 20a1 1 0 0 1 1 1v8a1 1 0 0 1 -1 1h-36a1 1 0 0 1 -1-1v-8a1 1 0 0 1 1-1zm-33-2v-2h4v2zm6 0v-2h18v2zm20 0v-2h4v2zm8-5a1 1 0 0 1 -1 1h-36a1 1 0 0 1 -1-1v-8a1 1 0 0 1 1-1h17v1a3.009 3.009 0 0 0 3 3h17zm18-8a1 1 0 0 1 -1 1h-34a1 1 0 0 1 -1-1v-23h36zm0-25h-36v-5a1 1 0 0 1 1-1h34a1 1 0 0 1 1 1z" /> <path d="m56 6h2v2h-2z" /> <path d="m52 6h2v2h-2z" /> <path d="m48 6h2v2h-2z" /> <path d="m36.293 17.293-6 6a1 1 0 0 0 0 1.414l6 6 1.414-1.414-5.293-5.293 5.293-5.293z" /> <path d="m47.707 17.293-1.414 1.414 5.293 5.293-5.293 5.293 1.414 1.414 6-6a1 1 0 0 0 0-1.414z" /> <path d="m32.513 23h18.974v1.999h-18.974z" transform="matrix(.317 -.949 .949 .317 5.94 56.244)" /> </g> </svg> <p> Either you already have a website (or a feed such as thing-speak) from which we can collect the data from your stations. In this case our system will periodically load your page, extract the data and then republish it on our map. Check the <a href='/data-feed/templates/'>feed examples</a> for website examples. </p> <br> <svg style='height:80px;float:left;padding-right:10px;' version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 612 612" xml:space="preserve"> <g> <path d="M472.322,235.219c-1.655,0-3.312,0.031-4.969,0.089c-8.127-81.861-77.388-146.003-161.352-146.003 c-83.963,0-153.226,64.143-161.352,146.004c-1.659-0.06-3.317-0.089-4.972-0.089C62.659,235.219,0,297.88,0,374.897 c0,77.02,62.659,139.678,139.678,139.678c8.967,0,16.234-7.268,16.234-16.234c0-8.965-7.268-16.234-16.234-16.234 c-59.113,0-107.209-48.093-107.209-107.209s48.096-107.209,107.209-107.209c5.916,0,11.893,0.495,17.77,1.472 c4.745,0.789,9.597-0.568,13.245-3.704c3.647-3.136,5.717-7.729,5.65-12.54l-0.009-0.586c-0.005-0.292-0.011-0.584-0.011-0.878 c0-71.504,58.173-129.679,129.68-129.679c71.506,0,129.679,58.175,129.679,129.679c0,0.276-0.005,0.551-0.009,0.825l-0.009,0.675 c-0.058,4.805,2.018,9.388,5.666,12.515c3.649,3.126,8.489,4.479,13.235,3.689c5.858-0.975,11.832-1.471,17.759-1.471 c59.116,0,107.209,48.094,107.209,107.209c0,59.115-48.093,107.209-107.209,107.209c-8.965,0-16.234,7.269-16.234,16.234 c0,8.967,7.269,16.234,16.234,16.234c77.02,0,139.678-62.658,139.678-139.678C612,297.88,549.342,235.219,472.322,235.219z" /> <path d="M228.476,245.689c0-38.489,31.312-69.802,69.802-69.802c8.967,0,16.234-7.268,16.234-16.234 c0-8.965-7.268-16.234-16.234-16.234c-56.393,0-102.271,45.878-102.271,102.271c0,8.967,7.268,16.234,16.234,16.234 C221.207,261.924,228.476,254.656,228.476,245.689z" /> <path d="M445.537,426.62l-129.941-95.209c-5.712-4.186-13.479-4.186-19.19,0l-130.535,95.644 c-5.664,4.149-8.02,11.47-5.835,18.143c2.184,6.674,8.409,11.187,15.431,11.187h46.962v50.075 c0,8.967,7.269,16.234,16.234,16.234h134.676c8.967,0,16.234-7.268,16.234-16.234v-50.075h46.965c0.008,0,0.018,0,0.027,0 c8.965,0,16.234-7.268,16.234-16.234C452.797,434.502,449.914,429.527,445.537,426.62z M373.338,423.916 c-8.965,0-16.234,7.269-16.234,16.234v50.075H254.896V440.15c0-8.965-7.268-16.234-16.234-16.234H225.09l80.912-59.283 l80.911,59.283H373.338z" /> </g> </svg> <p> Either you do not have a website, but you have a station, and you would like to "push" the data directly to our system. In this case, you will need to write a small program to "post" your station data via our upload API. We have code example for Arduino and Python. The code samples are available from the <a href='/data-feed/upload-api/'>upload API</a> page. </p> </ul> <br> <p>If you fall in the two first categories (have a known station or a website), or if you have any doubts, send us a message using the form below. If you fall in the second category, and want to programmatically post the data via our upload API, check our <a href='/data-feed/upload-api/'>data upload scripts and API</a> page. </p> <div style='clear:both'></div> </section><h2><p>Contact form</p></h2><section><script src='/jscripts/moment/bundle.min.js?_=20200103.150752&type=script'></script><script 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'/> <form class='ui raised form segment messenger data-feed' id='data-feed-form' style='border:none;background:none;'> <input class='form-input' type='hidden' name="source" value='data-feed'> <div class='row-fluid'> <div class='column-left'> Your name - eg <i class='input-example'>"John Doe"</i><br> <input class='form-input' name="name" required placeholder='your name'> <br><br> Your email address - eg <i class='input-example'>"john.doe@mail.com"</i><br> <input class='form-input' type="email" name="email" required placeholder="your email address" pattern="[^ @]*@[^ @]*"> <br><br> Your data-feed URL - eg <i class='input-example'>"https://airnow.gov/"</i><br> or station Id - eg <i class='input-example'>"https://weatherlink.com/..."</i> <input class='form-input' name="website" placeholder='your data-feed or web-site URL'> </div> <div class='column-right'> <p>Tell us what kind of help you need or can provide.</p> <textarea class='form-input' name="message" required placeholder='write few words about your request' style='height:242px'></textarea> </div> </div> <div style='clear: both'></div> <div> <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> </div> </form> <script>var i18nTexts=(i18nTexts||[]);i18nTexts.push([])</script><script type='text/javascript'>/*webapp:messenger-dyn.e2a00c8ffd7823e25b11*/var messenger;!function(){"use strict";var e,n,t={},r={};function o(e){var n=r[e];if(void 0!==n)return n.exports;var i=r[e]={id:e,exports:{}};return t[e].call(i.exports,i,i.exports,o),i.exports}o.m=t,o.n=function(e){var n=e&&e.__esModule?function(){return e.default}:function(){return e};return o.d(n,{a:n}),n},o.d=function(e,n){for(var t in n)o.o(n,t)&&!o.o(e,t)&&Object.defineProperty(e,t,{enumerable:!0,get:n[t]})},o.f={},o.e=function(e){return Promise.all(Object.keys(o.f).reduce((function(n,t){return o.f[t](e,n),n}),[]))},o.u=function(e){return e+"-dyn.b568e9d1f1b92876dc59.js"},o.g=function(){if("object"==typeof globalThis)return globalThis;try{return this||new Function("return this")()}catch(e){if("object"==typeof window)return window}}(),o.o=function(e,n){return Object.prototype.hasOwnProperty.call(e,n)},e={},n="messenger:",o.l=function(t,r,i,u){if(e[t])e[t].push(r);else{var a,c;if(void 0!==i)for(var f=document.getElementsByTagName("script"),s=0;s<f.length;s++){var d=f[s];if(d.getAttribute("src")==t||d.getAttribute("data-webpack")==n+i){a=d;break}}a||(c=!0,(a=document.createElement("script")).charset="utf-8",a.timeout=120,o.nc&&a.setAttribute("nonce",o.nc),a.setAttribute("data-webpack",n+i),a.src=t),e[t]=[r];var l=function(n,r){a.onerror=a.onload=null,clearTimeout(p);var o=e[t];if(delete e[t],a.parentNode&&a.parentNode.removeChild(a),o&&o.forEach((function(e){return e(r)})),n)return n(r)},p=setTimeout(l.bind(null,void 0,{type:"timeout",target:a}),12e4);a.onerror=l.bind(null,a.onerror),a.onload=l.bind(null,a.onload),c&&document.head.appendChild(a)}},o.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},o.p="/webapp/dist/",function(){var e={messenger:0};o.f.j=function(n,t){var r=o.o(e,n)?e[n]:void 0;if(0!==r)if(r)t.push(r[2]);else{var i=new Promise((function(t,o){r=e[n]=[t,o]}));t.push(r[2]=i);var u=o.p+o.u(n),a=new Error;o.l(u,(function(t){if(o.o(e,n)&&(0!==(r=e[n])&&(e[n]=void 0),r)){var i=t&&("load"===t.type?"missing":t.type),u=t&&t.target&&t.target.src;a.message="Loading chunk "+n+" failed.\n("+i+": "+u+")",a.name="ChunkLoadError",a.type=i,a.request=u,r[1](a)}}),"chunk-"+n,n)}};var n=function(n,t){var r,i,u=t[0],a=t[1],c=t[2],f=0;if(u.some((function(n){return 0!==e[n]}))){for(r in a)o.o(a,r)&&(o.m[r]=a[r]);c&&c(o)}for(n&&n(t);f<u.length;f++)i=u[f],o.o(e,i)&&e[i]&&e[i][0](),e[i]=0},t=self.webpackChunkmessenger=self.webpackChunkmessenger||[];t.forEach(n.bind(null,0)),t.push=n.bind(null,t.push.bind(t))}();var i={};function u(e,n){void 0===n&&(n={}),o.e("messenger-module").then(o.bind(o,4914)).then((function(t){t.initCaptcha(e,n)}))}function a(e){var n="messenger-"+Date.now();document.write("<div id='"+n+"'></div>"),o.e("messenger-module").then(o.bind(o,4914)).then((function(t){t.initForm("#"+n,e)}))}o.r(i),o.d(i,{form:function(){return a},init:function(){return u}}),messenger=i}();</script><script> messenger.init("#data-feed-form", { answer: { title: "[WAQI] Air Quality data feed" } }) </script> <style type="text/css"> .row-fluid .column-left { float: left; width: calc(50% - 20px); padding-right: 20px; } .row-fluid .column-right { float: left; width: 50%; box-sizing: border-box; } .row-fluid { width: 100%; text-align: left; } @media only screen and (max-width: 920px) { form.data-feed input { margin-bottom: 10px; } .column-left-inner { width: 100%; text-align: center; } .row-fluid .column-right>div { padding-left: 0px; } .row-fluid .column-left>div { padding-right: 0px; } .row-fluid .column-left { width: 100%; padding-right: 0; } .row-fluid .column-right { width: 100%; } form.data-feed input { width: 100%; } } </style> </section><h2><p>Data Validation</p></h2><section><p> If you own a luftdaten or similar low cost sensor, you can check the air quality data validation service: </p> <center><a href='/data-feed/validation/'>https://aqicn.org/data-feed/validation/</a></center> <p> For example, for the "luftdaten" sensor 84804, you can check the page <a href='/data-feed/validation/#/luftdaten/84804'>aqicn.org/data-feed/validation/#/luftdaten/84804</a> </p> <p> The data validation and qualification is also done automatically once a day. </p></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;padding:5px 0;font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;;'><span>Do you know of any Air Quality stations in your area?</span></div><div id='h1header4' class='h1sub'><span>why not participate to the map with your own air quality station?</span></div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header3',.88,{maxfs:45});fitLine('#h1header4',.88,{maxfs:38}); }; </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> .gaia-fluid-left { float: left; width: 62%; padding: 0; margin: 0; } .gaia-fluid-right { float: right; width: calc(38% - 10px); padding: 0; margin: 0; margin-top: 10px; padding-left: 10px; } @media only screen and (max-width: 800px) { .gaia-fluid-left { width: 100%; box-sizing: border-box; } .gaia-fluid-right { width: 100%; border: none; margin-top: 20px; } } .gaia-product { box-shadow: 0px 0px 3px rgba(0, 0, 0, .20); display: inline-block; margin: 5px; background: #f8f8f8; line-height: 1.2; border: 1px solid #f8f8f8; max-width: 420px; width: 90%; } .gaia-product:hover { border: 1px solid #888; } .ui.btn.primary { cursor: pointer; background-color: rgba(0, 134, 200, .8); color: white; border: none; border-radius: 3px; text-shadow: none; width: 100%; margin: 0 0 20px 0; } </style> <div class='gaia-fluid-left'> <p> Our GAIA air quality monitors are very easy to set up: You only need a WIFI access point and a USB compatible power supply. </p> <p> Once connected, your real time air pollution levels are instantaneously available on the maps and through the API. </p> <p> The station comes with a 10-meter water-proof power cable, a USB power supply, mounting equipment and an optional solar panel. </p> </div> <div class='gaia-fluid-right'> <center> <a href='/gaia/list/'> <div> <img src='/air/view/gaia/images/gaia-series-a12-large-with-map.png' style='width:100%' title='GAIA A12 Air Quality Monitoring Station'> </div> <div class='ui primary btn'> Click for more information </div> </a> </center> </div> <div style="clear: both;"></div></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='h1header5' 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('#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' > <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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