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href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//el'><div title='Greek' class='sprite-isprt-web-gr flag-el'>🇬🇷</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//ro'><div title='Romanian' class='sprite-isprt-web-ro flag-ro'>🇷🇴</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//bg'><div title='Bulgarian' class='sprite-isprt-web-bg flag-bg'>🇧🇬</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//ur'><div title='Urdu' class='sprite-isprt-web-pk flag-ur'>🇵🇰</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//hi'><div title='Hindi' class='sprite-isprt-web-in flag-hi'>🇮🇳</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//ar'><div title='Arabic' class='sprite-isprt-web-ae flag-ar'>🇦🇪</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//sr'><div title='Serbian' class='sprite-isprt-web-rs flag-sr'>🇷🇸</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//bn'><div title='Bangla' class='sprite-isprt-web-bd flag-bn'>🇧🇩</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//bs'><div title='Bosnian' class='sprite-isprt-web-ba flag-bs'>🇧🇦</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//hr'><div title='Croatian' class='sprite-isprt-web-hr flag-hr'>🇭🇷</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//tr'><div title='Turkish' class='sprite-isprt-web-tr flag-tr'>🇹🇷</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//uk'><div title='Ukrainian' class='sprite-isprt-web-ua flag-uk'>🇺🇦</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//cs'><div title='Czech' class='sprite-isprt-web-cz flag-cs'>🇨🇿</div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//be'><div title='Belarusian' class='sprite-isprt-web-by flag-be'>🇧🇾</div></a></div><div id='hdrlang-navigation'><div id='hdrlang-navigation-inner' class='hdrlang-navigation'><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal/' class='lang-en'><div class='item'><div class='flag sprite-isprt-web-gb'></div><span class='name'>English</span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//cn' class='lang-zh-CN'><div class='item'><div class='flag sprite-isprt-web-cn'></div><span class='name'>Chinese <span>- 简体中文</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//jp' class='lang-ja'><div class='item'><div class='flag sprite-isprt-web-jp'></div><span class='name'>Japanese <span>- 日本</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//es' class='lang-es'><div class='item'><div class='flag sprite-isprt-web-es'></div><span class='name'>Spanish <span>- español</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//kr' class='lang-ko'><div class='item'><div class='flag sprite-isprt-web-kr'></div><span class='name'>Korean <span>- 한국의</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//ru' class='lang-ru'><div class='item'><div class='flag sprite-isprt-web-ru'></div><span class='name'>Russian <span>- русский</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//hk' class='lang-zh-TW'><div class='item'><div class='flag sprite-isprt-web-hk'></div><span class='name'>Traditional Chinese <span>- 繁體中文</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//fr' class='lang-fr'><div class='item'><div class='flag sprite-isprt-web-fr'></div><span class='name'>French <span>- Francais</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//pl' class='lang-pl'><div class='item'><div class='flag sprite-isprt-web-pl'></div><span class='name'>Polish <span>- Polski</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//de' class='lang-de'><div class='item'><div class='flag sprite-isprt-web-de'></div><span class='name'>German <span>- Deutsch</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//pt' class='lang-pt'><div class='item'><div class='flag sprite-isprt-web-br'></div><span class='name'>Portuguese <span>- Português</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//vn' class='lang-vi'><div class='item'><div class='flag sprite-isprt-web-vn'></div><span class='name'>Vietnamese <span>- Tiếng Việt</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//it' class='lang-it'><div class='item'><div class='flag sprite-isprt-web-it'>🇮🇹</div><span class='name'>Italian <span>- Italiano</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//id' class='lang-id'><div class='item'><div class='flag sprite-isprt-web-id'>🇮🇩</div><span class='name'>Indonesian <span>- bahasa Indonesia</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//nl' class='lang-nl'><div class='item'><div class='flag sprite-isprt-web-nl'>🇳🇱</div><span class='name'>Dutch <span>- Nederlands</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//fa' class='lang-fa'><div class='item'><div class='flag sprite-isprt-web-ir'>🇮🇷</div><span class='name'>Persian <span>- فارسی</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//th' class='lang-th'><div class='item'><div class='flag sprite-isprt-web-th'>🇹🇭</div><span class='name'>Thai <span>- ภาษาไทย</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//hu' class='lang-hu'><div class='item'><div class='flag sprite-isprt-web-hu'>🇭🇺</div><span class='name'>Hungarian <span>- Magyar</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//el' class='lang-el'><div class='item'><div class='flag sprite-isprt-web-gr'>🇬🇷</div><span class='name'>Greek <span>- Ελληνικά</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//ro' class='lang-ro'><div class='item'><div class='flag sprite-isprt-web-ro'>🇷🇴</div><span class='name'>Romanian <span>- Română</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//bg' class='lang-bg'><div class='item'><div class='flag sprite-isprt-web-bg'>🇧🇬</div><span class='name'>Bulgarian <span>- български</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//ur' class='lang-ur'><div class='item'><div class='flag sprite-isprt-web-pk'>🇵🇰</div><span class='name'>Urdu <span>- اردو</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//hi' class='lang-hi'><div class='item'><div class='flag sprite-isprt-web-in'>🇮🇳</div><span class='name'>Hindi <span>- हिंदी</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//ar' class='lang-ar'><div class='item'><div class='flag sprite-isprt-web-ae'>🇦🇪</div><span class='name'>Arabic <span>- العربية</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//sr' class='lang-sr'><div class='item'><div class='flag sprite-isprt-web-rs'>🇷🇸</div><span class='name'>Serbian <span>- Српски</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//bn' class='lang-bn'><div class='item'><div class='flag sprite-isprt-web-bd'>🇧🇩</div><span class='name'>Bangla <span>- বাংলা</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//bs' class='lang-bs'><div class='item'><div class='flag sprite-isprt-web-ba'>🇧🇦</div><span class='name'>Bosnian <span>- босански</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//hr' class='lang-hr'><div class='item'><div class='flag sprite-isprt-web-hr'>🇭🇷</div><span class='name'>Croatian <span>- hrvatski</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//tr' class='lang-tr'><div class='item'><div class='flag sprite-isprt-web-tr'>🇹🇷</div><span class='name'>Turkish <span>- Türkçe</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//uk' class='lang-uk'><div class='item'><div class='flag sprite-isprt-web-ua'>🇺🇦</div><span class='name'>Ukrainian <span>- українська</span></span></div></a><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//cs' class='lang-cs'><div class='item'><div class='flag sprite-isprt-web-cz'>🇨🇿</div><span class='name'>Czech <span>- čeština</span></span></div></a><a 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{background-size: 100%;background: url(https://aqicn.org/images//bluesky-banner-panoramic.jpg) no-repeat center bottom #eee;margin-top: -2px;z-index: -1;border-bottom: 1px solid #888;width: 100%;}.h2-title {font-family: inherit;font-size: 1.1em;overflow: hidden;text-align: center;text-transform: capitalize;}.h2-title:before,.h2-title:after {background-color: #ddd;content: '';display: inline-block;height: 1px;position: relative;vertical-align: middle;width: 50%;}.h2-title:before {right: 0.5em;margin-left: -50%;}.h2-title:after {left: 0.5em;margin-right: -50%;}@media only screen and (max-width: 800px) {.section-content {line-height: 1.6;max-width: 98%;min-height: 10px;}.section-banner {display: none;}}</style><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' ><i>Posted on July 16<sup>th</sup> 2015</i><div 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-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>Air Quality Scale in Quebec and Montreal<br>(https:\/\/aqicn.org\/faq\/2015-07-16\/air-quality-scale-in-quebec-and-montreal\/pt\/)"});}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;'>Compartilhar: <a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal/pt/'>aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal/pt/</a></i><br><div class='entry-content' ng-controller='MainController as ctrl'> <style> table.fancy { border: 2px solid black; border-spacing: 0px; background: white; } table.fancy td { margin: 0px; padding: 3px; text-align: center; border-bottom: solid 1px #DEDEDE; border-right: solid 1px #DEDEDE; font-size: 13px; } table.fancy tr:hover { background: #9AC9FF; } </style> <div style='float:right;padding-left:20px;text-align:center;'> <img alt="Flag of Quebec.svg" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5f/Flag_of_Quebec.svg/225px-Flag_of_Quebec.svg.png" width="225" height="150" class="thumbborder" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5f/Flag_of_Quebec.svg/338px-Flag_of_Quebec.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5f/Flag_of_Quebec.svg/450px-Flag_of_Quebec.svg.png 2x" data-file-width="600" data-file-height="400"> <br> <small> The <i>Fleurdelisé</i>, flag of Quebec.<br> (attribution: <a href='https://en.wikipedia.org/wiki/Flag_of_Quebec'>wikipedia</a>) </small> </div> <p class="bigletter">Os dados de qualidade do ar para <a href='/city/montreal/pt/'>Montreal</a> e <a href='/map/quebec/pt/'>Quebec</a> já estão disponíveis há algum tempo, mas recentemente recebemos algumas perguntas sobre a escala AQI usada nesta parte do Canadá. Um deles é de Marie A., que perguntou:</p> <blockquote> <p>Gostaria de saber por que o Índice de Qualidade do Ar do seu site é diferente do AQI do site de Montreal? Você recalcula alguma coisa para atender aos padrões AQI da EPA dos EUA? Se sim, como? Com quais dados?</p> <p>Por exemplo, na data de 14 de julho às 14h, a maioria dos índices em seu <a href='/city/montreal/pt/'>site</a> variam de 53 a 65 (um índice é 37) e deve ser AQI em tempo real. No site da <a href='http://ville.montreal.qc.ca/portal/page?_pageid=7237,74495616&_dad=portal&_schema=PORTAL'>cidade de Montreal</a> , datado de 14 de julho às 14h, a maioria dos índices varia de 16 a 37 e também é AQI em tempo real.</p> <p>Então, você pode me explicar a diferença e quais detalhes dos padrões você está usando?</p> </blockquote> <p>Esta é realmente uma pergunta muito boa. e explicaremos neste artigo as diferentes escalas em uso, como as escalas se comparam entre si e como a conversão pode ser feita.</p> <br><br> <center><br>oOo<br><br></center> <p>Como explicamos em um de nossos <a href='faq/2015-03-20/a-comparison-of-worldwide-air-quality-scales-part-1/'>artigos anteriores</a> , todos os números do AQI publicados no projeto do Índice Mundial de Qualidade do Ar estão atualmente <sup><a href="#nowcast-footnote-1">[1]</a></sup> usando o padrão da EPA dos EUA. Nem Montreal nem Quebec estão sujeitos a esta regra, portanto isso confirma que os valores exibidos na página <a href='/city/montreal/pt/'>cidade/montreal</a> estão usando o padrão US EPA.</p> <p>Esta é a razão para a diferença entre as leituras do projeto do Índice Mundial de Qualidade do Ar e o site da cidade de Montreal ( <a href='http://ville.montreal.qc.ca/portal/page?_pageid=7237,74495616&_dad=portal&_schema=PORTAL'>montreal.qc.ca</a> ): A EPA da cidade de Montreal (Agência de Proteção Ambiental) está usando sua própria escala AQI, que está claramente descrita em o mesmo site. Para torná-lo um pouco mais "complexo", Quebec está na verdade usando outra escala AQI ( <a href='http://www.iqa.mddefp.gouv.qc.ca/contenu/calcul.htm'>especificada neste link</a> ) em comparação com Montreal (tabarnac!). E, claro, o Canadá está usando outra escala, chamada AQHI para Índice de Qualidade do Ar e Saúde - mas isso é algo que já escrevemos em outro <a href='/faq/2015-06-03/overview-of-hong-kongs-air-quality-health-index'>artigo</a> .</p> <br> <p>O resumo dos pontos de interrupção do AQI de Montreal e Quebec estão listados nesta tabela:</p> <center> <table class='fancy' style='width:90%;'> <tr style='background-color:#ccf;'> <th rowspan=2>Pollutant <th colspan=2 style='border-left:2px solid black;'>Quebec <th colspan=2 style='border-left:2px solid black;'>Montreal <tr style='background-color:#ccf;font-size:12px;'> <th style='border-left:2px solid black;'>Averaging Period <th>Reference Value <th style='border-left:2px solid black;'>Averaging Period <th>Reference Value <tr> <td>Fine Particles (PM<sub>2.5</sub>) <td style='border-left:2px solid black;'>3 hours <td>35µg/m3 <td style='border-left:2px solid black;'>3 hours <td>35µg/m3 <tr> <td>Ozone (O<sub>3</sub>) <td style='border-left:2px solid black;'>1 hour <td>82 ppb <td style='border-left:2px solid black;'>1 hour <td>160 µg/m3 <tr> <td>Nitrogen dioxide (NO<sub>2</sub>) <td style='border-left:2px solid black;'>1 hour <td>213 ppb <td style='border-left:2px solid black;'>1 hour <td>400 µg/m3 <tr> <td>Sulfur dioxide (SO<sub>2</sub>) <td style='border-left:2px solid black;'>4 minutes mobile <td>213 ppb <td style='border-left:2px solid black;'>10 minutes mobile <td>500 µg/m3 <tr> <td>Carbon monoxide (CO) <td style='border-left:2px solid black;'>1 hour <td>30 ppm <td style='border-left:2px solid black;'>1 hour <td>35 µg/m3 </table> </center> <br> <center><br>oOo<br><br></center> <p>Para converter os valores para o padrão da EPA dos EUA, são necessárias as concentrações brutas expressas em miligramas ou <a href='https://en.wikipedia.org/wiki/Parts-per_notation'>ppb/ppm</a> (contagem de partículas por bilhão/milhão).</p> <p>Infelizmente, nem Montreal nem o condado de Quebec fornecem essas concentrações brutas. Em vez disso, eles fornecem apenas leituras de qualidade do ar já convertidas em suas respectivas escalas de AQI. Mas isso na verdade não é um problema, uma vez que a reconversão em concentração pode ser feita usando esta fórmula linear simples:</p> <center><code>Raw concentration (pollutant) = Reference value (pollutant) * AQI }(pollutant) / 50</code></center> <p>Por exemplo, se um valor de PM <sub>2,5</sub> AQI de 18 for publicado no site da cidade de Montreal, então a concentração bruta em miligramas é 18*35/50 = 12,6 mg/m3. Observe que para Ozônio, CO, SO <sub>2</sub> e NO <sub>2</sub> a unidade é diferente para Quebec e Montreal (ppb para Quebec - padrão dos EUA e mg para Montreal padrão da UE), mas isso é apenas uma conversão adicional (parcialmente explicada neste <a href='/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast'>artigo</a> ) .</p> <p>Observe que o AQI de PM <sub>2,5</sub> é baseado na média de 3 horas, enquanto no projeto do Índice Mundial de Qualidade do Ar, o relatório horário de AQI <a href='/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/pt/'>de PM <sub>2,5</sub> Instant Cast</a> é usado. Como não é possível deduzir os dados horários da média de 3 horas, isso na verdade significa que o PM <sub>2,5</sub> AQI relatado no projeto do Índice Mundial de Qualidade do Ar para Montreal e Quebec não é exatamente um relatório de “Elenco Instantâneo”.</p> <center><br>oOo<br><br></center> <p>Então, por último, aqui está a comparação visual de 3 escalas AQI (US EPA, Quebec e Montreal) para PM <sub>2,5</sub> e Ozônio (observe que para Ozônio, a unidade ppm é usada - então a conversão de mg para ppm é feita para Montreal) .</p> <p>Um ponto interessante a notar é que tanto Quebec quanto Montreal estão usando o valor AQI de 25 como o ponto de interrupção entre Bom (verde) e Aceitável (amarelo), enquanto para a EPA dos EUA, esse ponto de interrupção é definido em 50. Portanto, no geral , ao comparar maçã a maçã com a conversão e os pontos de interrupção corretos em mente, a faixa AQI relatada é muito semelhante entre o padrão EPA dos EUA e os padrões de Quebec/Montreal.</p> <table width=100% id='pm-table'> <tr> <div id='scale-pm25'></div> <div id='scale-o3'></div> </table> <script src="/jscripts/forecast/d3.v3.min.js"></script> <script src='/air/view/faq/images/aqi-scales/scales-viewer.min.js?_=1555547488'></script><link href='/air/view/faq/images/aqi-scales/scales-viewer.css?_=1555547488' rel='stylesheet'/> <script type="text/javascript"> function doInitPage() { var scales=new AqiScale({"montreal":{"standard":{"epa":"Ville de Montr\u00e9al","url":"http:\/\/ville.montreal.qc.ca\/portal\/page?_pageid=7237,74495616&_dad=portal&_schema=PORTAL","unit":["IQA","indice de la qualit\u00e9 de l\u2019air"]},"flag":"ca","levels":[{"range":25,"title":"Bon","color":"#78a22f","description":"-"},{"range":50,"title":"Aceptable","color":"#f5dd27","description":"-"},{"range":2000,"title":"Mauvais","color":"#ef4035","description":"-"}],"units":{"o3":"ug\/m3","no2":"ug\/m3","so2":"ug\/m3","co":"mg\/m3"},"pm25":[[25,17.5],[50,35],[100,70],[200,140],[300,210],[400,280],[500,350]],"o3":[[25,0.08],[50,0.16],[100,0.32],[200,0.74],[300,1.06]]},"quebec":{"standard":{"epa":"Minist\u00e8re du D\u00e9veloppement durable, de l\u2019Environnement et de la Lutte contre les changements climatiques","url":"http:\/\/www.iqa.mddefp.gouv.qc.ca\/contenu\/index.asp","unit":["IQA","indice de la qualit\u00e9 de l\u2019air"]},"flag":"ca","levels":[{"range":25,"title":"Bon","color":"#00ce00","description":"-"},{"range":50,"title":"Aceptable","color":"#ffff00","description":"-"},{"range":2000,"title":"Mauvais","color":"#ff0000","description":"-"}],"pm25":[[25,17.5],[50,35],[100,70],[200,140],[300,210],[400,280],[500,350]],"o3":[[25,0.041],[50,0.082],[100,0.164],[200,0.338],[300,0.502]]},"us":{"standard":{"epa":"United States Environmental Protection Agency","url":"http:\/\/epa.gov","unit":["AQI","Air Quality Index"]},"levels":[{"range":50,"title":"Good","color":"#009966","description":"Air quality is considered satisfactory, and air pollution poses little or no risk","textcolor":"#ffffff"},{"range":100,"title":"Moderate","color":"#ffde33","description":"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."},{"range":150,"title":"Unhealthy for Sensitive Groups","color":"#ff9933","description":"Members of sensitive groups may experience health effects. The general public is not likely to be affected."},{"range":200,"title":"Unhealthy","color":"#cc0033","description":"Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects","textcolor":"#ffffff"},{"range":300,"title":"Very Unhealthy","color":"#660099","description":"Health warnings of emergency conditions. The entire population is more likely to be affected.","textcolor":"#ffffff"},{"range":500,"title":"Hazardous","color":"#7e0023","description":"Health alert: everyone may experience more serious health effects","textcolor":"#ffffff"}],"pm25":[{"aqi":50,"conc":12,"color":"#009966"},{"aqi":100,"conc":35.5,"color":"#ffde33"},{"aqi":150,"conc":65.5,"color":"#ff9933"},{"aqi":200,"conc":150.5,"color":"#cc0033"},{"aqi":300,"conc":250.5,"color":"#660099"},{"aqi":400,"conc":350.5,"color":"#660099"},{"aqi":500,"conc":500.4,"color":"#7e0023"}],"pm10":[{"aqi":50,"conc":55,"color":"#009966"},{"aqi":100,"conc":155,"color":"#ffde33"},{"aqi":150,"conc":255,"color":"#ff9933"},{"aqi":200,"conc":355,"color":"#cc0033"},{"aqi":300,"conc":425,"color":"#660099"},{"aqi":400,"conc":505,"color":"#660099"},{"aqi":500,"conc":605,"color":"#7e0023"}],"o3":[{"aqi":100,"conc":0.125,"color":"#ffde33","skip":true},{"aqi":150,"conc":0.165,"color":"#ff9933"},{"aqi":200,"conc":0.205,"color":"#cc0033"},{"aqi":300,"conc":0.405,"color":"#660099"},{"aqi":500,"conc":0.605,"color":"#7e0023"}],"o3_8":[{"aqi":50,"conc":0.0625,"color":"#009966"},{"aqi":100,"conc":0.076,"color":"#ffde33"},{"aqi":150,"conc":0.096,"color":"#ff9933"},{"aqi":200,"conc":0.116,"color":"#cc0033"},{"aqi":300,"conc":0.375,"color":"#660099"}],"no2_24":[[50,54],[100,100],[150,361],[200,650],[300,1250],[400,1650],[500,2040]],"so2_24":[[50,35],[100,76],[150,186],[200,305],[300,605],[400,805],[500,1004]]}}); var width = document.getElementById("pm-table").clientWidth * .95; compareScales("scale-pm25", scales.countries(["us", "montreal", "quebec"], "pm25"), 350, width, "mg/m3", "PM25 scales comparison" ); compareScales("scale-o3", scales.countries(["us", "montreal", "quebec"], "o3"), .5, width, "ppb", "1-hour Ozone scales comparison" ); } doInitPage(); </script> <div style='border-top:1px solid black;width:120px;'></div> <div id='nowcast-footnote-1'> [1] <span>Agora estamos trabalhando em uma opção que permitirá aos usuários selecionar qualquer escala de AQI que desejarem.</span> </div> <br> <br> <link rel='stylesheet' href='/images-static/flags.css/css/flag-icon.min.css' /> <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 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24.84375 A 1.0001 1.0001 0 0 0 7.59375 23.0625 z" color="#000" ></path></svg>-<br><br></center> <div style='color:#444;background-color:#eee;padding:10px;margin:10px;border:1px dashed black;'> <b>Note</b>: <span>Este artigo faz parte de uma série sobre escalas mundiais de qualidade do ar.</span> <br> <br> <span>Para obter mais informações sobre países ou continentes específicos, consulte estes artigos:</span> <a href='/faq/2015-05-02/south-asian-air-quality-scales-malaysia-and-thailand/pt/'> <div class='flag flag-icon-background flag-icon-th' style='width:22px;height:12px;display:inline-block;'></div> <div class='flag flag-icon-background flag-icon-my' style='width:22px;height:12px;display:inline-block;'></div> <span>Tailândia e Malásia</span> </a> - <a href='/faq/2015-05-15/india-national-air-quality-index/pt/'> <div class='flag flag-icon-background flag-icon-in' style='width:22px;height:12px;display:inline-block;'></div> <span>Índia</span> </a> - <a href='/faq/2015-03-20/a-comparison-of-worldwide-air-quality-scales-part-1/pt/'> <div class='flag flag-icon-background flag-icon-cn' style='width:22px;height:12px;display:inline-block;'></div> China </a> - <a href='/faq/2015-06-03/overview-of-hong-kongs-air-quality-health-index/pt/'> <div class='flag flag-icon-background flag-icon-hk' style='width:22px;height:12px;display:inline-block;'></div> <div class='flag flag-icon-background flag-icon-ca' style='width:22px;height:12px;display:inline-block;'></div> <span>Hong Kong / Canadá (Índice de Qualidade do Ar e Saúde)</span> </a> - <a href='/faq/2015-05-30/air-quality-forecast-in-south-america/pt/'> <div class='flag flag-icon-background flag-icon-br' style='width:22px;height:12px;display:inline-block;'></div> <div class='flag flag-icon-background flag-icon-co' style='width:22px;height:12px;display:inline-block;'></div> <div class='flag flag-icon-background flag-icon-ec' style='width:22px;height:12px;display:inline-block;'></div> <div class='flag flag-icon-background flag-icon-pe' style='width:22px;height:12px;display:inline-block;'></div> <div class='flag flag-icon-background flag-icon-cl' style='width:22px;height:12px;display:inline-block;'></div> <div class='flag flag-icon-background flag-icon-mx' style='width:22px;height:12px;display:inline-block;'></div> <div class='flag flag-icon-background flag-icon-ar' style='width:22px;height:12px;display:inline-block;'></div> <div class='flag flag-icon-background flag-icon-uy' style='width:22px;height:12px;display:inline-block;'></div> <div class='flag flag-icon-background flag-icon-pr' style='width:22px;height:12px;display:inline-block;'></div> <span>América do Sul</span> </a> - <a href='/faq/2014-09-06/australian-air-quality-comparison-with-the-us-epa-aqi-scale/pt/'> <div class='flag flag-icon-background flag-icon-au' style='width:22px;height:12px;display:inline-block;'></div> <span>Austrália</span> </a> - <a href='/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal/pt/'> <div class='flag flag-icon-background flag-icon-ca' style='width:22px;height:12px;display:inline-block;'></div> <span>Quebeque e Montreal</span> </a> - <a href='/faq/2013-06-25/singapore-psi-and-pm25-aqi-why-is-there-a-difference-between-the-two-readings/pt/'> <div class='flag flag-icon-background flag-icon-sg' style='width:22px;height:12px;display:inline-block;'></div> <span>Cingapura</span> </a> - <a href='/faq/2015-09-03/air-quality-scale-in-poland/pt/'> <div class='flag flag-icon-background flag-icon-pl' style='width:22px;height:12px;display:inline-block;'></div> <span>Polônia</span> </a> - <a href='/faq/2015-07-18/real-time-air-quality-monitoring-in-indonesia/pt/'> <div class='flag flag-icon-background flag-icon-id' style='width:22px;height:12px;display:inline-block;'></div> <span>Indonésia</span> </a>. <p>Para obter informações sobre a média de 24 horas usada ou Ozônio e Material Particulado (PM <sub>2,5</sub> ), consulte esses dois artigos: <a href='/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast/pt/'>Índice de Ozônio Terrestre</a> - <a href='/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/pt/'>PM <sub>2,5</sub> Instant Cast</a></p> </div> </div></div></div></div><center style='border-top: 1px solid #ccc'><center style='margin:10px 0;'><ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-0281575029452656" data-ad-slot="2455076269" data-ad-format="auto"></ins></center><script>(adsbygoogle = window.adsbygoogle || []).push({});</script><div class='section-content'><a href='/faq/" . srvLang() . "'><span>Clique aqui para ver todas as entradas do FAQ</span></a><div style='margin-left: 20px;line-heigh:1.5;color:#888;' class='faqmore'><style type='text/css'>.faqmore li a:hover {background: #62a6c8;color: white;text-decoration: none;}.faqmore li a {color: #888;}</style><li><a href='https://aqicn.org/scale/pt/'>AQI Scale: What do the colors and numbers mean?</a></li><li><a href='https://aqicn.org/faq/using-statistical-distances-for-real-time-sensor-networks-validation/pt/'>Using Statistical Distances for Real-time Sensor Networks Validation</a></li><li><a href='https://aqicn.org/faq/2017-01-10/nitrogen-dioxyde-no2-in-our-atmosphere/pt/'>Nitrogen Dioxyde (NO<sub>2</sub>) in our atmosphere</a></li></div><div style='height:1px;background-color:#aaaaaa;width:220px;margin-top:5px;'></div><center><script>var i18nTexts=(i18nTexts||[]);i18nTexts.push({"wa.KqlOlZrllRNJ+7u88XlbL2RQFwo=":"Ops.. Algo deu errado. 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O público em geral não é susceptível de ser afetado.</td></tr><tr style="background-color:#cc0033;"><td class='aqiwtxt' nowrap="true">151-200</td><td class='aqiwtxt'>Não saudável</td><td class='aqiwtxt'>150-200: Insalubre - Toda a população pode começar a sentir os efeitos na saúde; membros de grupos sensíveis podem apresentar efeitos mais sérios de saúde.</td></tr><tr style="background-color:#660099;"><td class='aqiwtxt' nowrap="true">201-300</td><td class='aqiwtxt'>Muito Prejudical à Saúde</td><td class='aqiwtxt'>200-300: Muito Insalubre - As advertências de saúde de situações de emergência. Toda a população é mais susceptível de ser afectada.</td></tr><tr style="background-color:#7e0023;"><td class='aqiwtxt' nowrap="true">300+</td><td class='aqiwtxt'>Perigoso</td><td class='aqiwtxt'>300+: Perigoso - alerta de saúde: todos podem experimentar efeitos mais graves para a saúde</td></tr></table></div><br>Para saber mais sobre Qualidade do Ar e Poluição, verifique o <a href='http://en.wikipedia.org/wiki/Air_quality'> wikipedia Qualidade do Ar tópico </a> ou o <a href='http://www.airnow.gov/index.cfm?action=aqibasics.aqi'> guia AIRNow a Qualidade do Ar e sua saúde</a>.<br><br>Para informações sobre saúde muito úteis em Pequim, procure Doutor Richard Saint Cyr MD, consulte <a href='http://www.myhealthbeijing.com/'> www.myhealthbeijing.com </a> blogue.<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>Aviso de uso</b>: Todos os dados da Qualidade do Ar não são validados no momento da publicação e, devido à garantia de qualidade, esses dados podem ser alterados, sem aviso prévio, a qualquer momento. 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Ar</a></li><li><a href='/forecast/pt/'>Previsão Da Qualidade Do Ar</a></li><li><a href='/products/pt/'>Produtos De Qualidade Do Ar (máscaras, Monitores ...)</a></li><li><a href='/api/pt/'>API (Interface de Programação de Aplicativo)</a></li><li><a href='/data-platform/pt/'>Plataforma de dados históricos</a></li></div><div class='footercolumn2 footercolumn'><h3>Credits</h3><br><li><a href='/sources/pt/'>A toda a EPA do mundo pelo seu excelente trabalho na manutenção, medição e fornecimento de informações sobre a qualidade do ar aos cidadãos do mundo</a></li><li><a href='http://www.maxmind.com' target=_>Este produto inclui dados GeoLite2 criados pela MaxMind, disponíveis em maxmind.com.</a><li><a href='http://geonames.org' target=_>Este produto inclui informações da cidade GeoNames, disponíveis em geonames.org.</a><li><a href="http://openweathermap.org/" target="__s">Mapa meteorológico aberto, combinado com algoritmo de melhoria qweather™</a><li><a href='http://wxqa.com' 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Portuguese</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//vn' >Tiếng Việt - Vietnamese</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//it' >Italiano - Italian</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//id' >bahasa Indonesia - Indonesian</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//nl' >Nederlands - Dutch</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//fa' >فارسی - Persian</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//th' >ภาษาไทย - Thai</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//hu' >Magyar - Hungarian</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//el' >Ελληνικά - Greek</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//ro' >Română - Romanian</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//bg' >български - Bulgarian</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//ur' >اردو - Urdu</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//hi' >हिंदी - Hindi</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//ar' >العربية - Arabic</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//sr' >Српски - Serbian</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//bn' >বাংলা - Bangla</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//bs' >босански - Bosnian</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//hr' >hrvatski - Croatian</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//tr' >Türkçe - Turkish</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//uk' >українська - Ukrainian</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//cs' >čeština - Czech</option><option value='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal//be' >беларускі - Belarusian</option></select></div><br><table><tr><td><center><i>Temperature unit:</i><br><span style='font-size:18px'><span style='display:;' id='settings-temp-label-on'>Celcius</span><span style='display:none;' id='settings-temp-label-off'>Fahrenheit</span></span></center></td><td><div class="onoffswitch" onclick='settingsMenu.click("temp")'><input type="checkbox" name="onoffswitch" class="onoffswitch-checkbox" id="settings-temp" checked ><label class="onoffswitch-label" for="myonoffswitch"><span class="onoffswitch-inner"></span><span class="onoffswitch-switch"></span></label></div></table></center><br></div><div style='display:none;height:0px;' id='settingsdiv-arrow'><div style='width: 0; height: 0; border: 7px solid transparent;top:0px;border-top: 7px solid #fff;position:relative;;margin-left:100px;'></div></div></div><script>function CSettingsMenu(){var self=this;var isInit = false;var timeout = null;var isPopup = false;this.show = function(){log("show!");if (isPopup) {this.close();return;}isPopup = true;$("#settingsdiv-arrow").hide();$("#settingsdiv").show();var pos = $("#footer-settings-img").offset();$("#settingsdiv-outer").css({left: "0px",width: "100%",bottom: "30px"});$("#settingsdiv").css({width: "100%",textAlign: "center",boxSizing: "border-box"});};this.close = function() {log("close!");$("#settingsdiv").hide();isPopup = false;};this.onmouseover = function(){if (isPopup) return;if (!footer || !footer.isFloating()) return;if (getWindowWidth()<800) return;if (!isInit) {$('#settingsdiv-outer').show().mouseleave(function(){ self.onmouseout(); }).mouseenter(function(){ self.onmouseover(); });display("temp");isInit = true;}if (timeout) clearTimeout(timeout);timeout = null;var pos = $("#footer-settings-img").offset();var px = (pos.left+6-100);$("#settingsdiv-outer").css({left: px + "px",bottom: (30) + "px"});$("#settingsdiv").show();$("#settingsdiv-arrow").delay(150).show();var tb = document.getElementById("settingsdiv").getBoundingClientRect(), w =getWindowWidth();var ml = Math.min((w-tb.right-2),0);$("#settingsdiv-outer").css({left:(px+ml)+"px"});};this.onmouseout = function(){if (isPopup) return;isShown = false;if (timeout) clearTimeout(timeout);timeout = setTimeout(function(){$("#settingsdiv").slideUp(200);$("#settingsdiv-arrow").hide();},150);};this.click = function(item){var status = store.get('aqicn-settings-'+item);store.set('aqicn-settings-'+item,status==1?2:1);display(item);if (item=="temp") convertTemperature();};this.val = function(item) {var status = store.get('aqicn-settings-'+item);return status!=1;};var display = function(item) {var status = store.get('aqicn-settings-'+item);if (status==1){$("#settings-"+item+"-label-off").show();$("#settings-"+item+"-label-on").hide();}else{$("#settings-"+item+"-label-on").show();$("#settings-"+item+"-label-off").hide();}var o = document.getElementById("settings-"+item);if (o) o.checked = status!=1;};document.getElementById('settingsdiv-outer').addEventListener('touchmove', function(e) {e.preventDefault();}, false);return this;}var settingsMenu = new CSettingsMenu();</script><script type="text/javascript"> fitLine(".link",.9); </script><script src='https://aqicn.org/air-cache/jquery-3.4.1.min.js?_=20191127.152416' type='text/javascript'></script><script type="text/javascript">function initTime(){if (isMobileUA) return;function setTimeText(){var monthNames = [ "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ]; var dayNames= ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];var newDate = new Date();newDate.setDate(newDate.getDate());var od = document.getElementById("ClockTime");if (od) od.innerHTML = dayNames[newDate.getDay()] + " " + monthNames[newDate.getMonth()] + ' ' + newDate.getDate() + ', ' + newDate.getFullYear();var minutes = new Date().getMinutes();var hours = new Date().getHours();var time = ( hours < 10 ? 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