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charset=UTF-8" /><title>Ottawa Downtown, Ontario, Canada Air Pollution: Real-time Air Quality Index</title><meta name="Description" itemprop="description" content="Real-time air pollution index for 100+ countries" http-equiv="Description" /><link rel="preconnect" href="https://api.waqi.info"><script src='https://aqicn.org/air-cache/citym/scripts/bundles/head.min.js?_=20231231.091916' type='text/javascript'></script><script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script><script>(adsbygoogle = window.adsbygoogle || []).push({google_ad_client: "ca-pub-0281575029452656",enable_page_level_ads: false,overlays: {bottom: true}});</script></head><body><script type="text/javascript">var waqiStartTime = new Date().getTime();function jskey() { return (function(){ var u = ""; decodeURIComponent("%603Z3F%5BWiynQ2tdN%7BuOTCSXYnukYhx0QSGUGYh8%5BR%3E%3E").split('').forEach(function(c){ u += String.fromCharCode(c.charCodeAt(0)-1); });return u; })() } function getLang() { return "en"; }function getCity() { return "CA:Ontario\/Ottawa Downtown"; }function getLeafletBundle() { return "https://aqicn.org/jscripts/leaflet-light/build/prod/map.d9b34ac5738ee6308e06.js"; }function getLeafletGlBundle() { return "https://aqicn.org/jscripts/leaflet-gl/buildx/prod/map.bd6e2a60b5d1ce8257af.js"; }function getWidgetBundle() { return "https://aqicn.org/air-cache/widget/build/awui.js?_=20231231.100440"; }</script><link rel='stylesheet' type='text/css' href='https://aqicn.org/air-cache/citym/scripts/bundles/style.min.css?_=20190418.093127' /><script src='https://aqicn.org/air-cache/citym/scripts/bundles/city-lite.min.js?_=20240111.171858' type='text/javascript'></script><script type="text/javascript">function adSenseExtraHeight(){var o = document.getElementById("rads");if (o&&typeof(o.offsetHeight) == 'number') {return o.offsetHeight;}return 0;}</script><script></script><div class='waPage ' id='waPageMain' style='-ms-touch-action: none'><div class='waPageHeader' id='waHdrMain' ><div id='wgtBtn1' class='wgtBtn wgtBtnHdrIcon' style=''><div style='padding:3px;height:32px;' ><span class='sprite-isprt-wa-map' ></span></div></div><div id='wgtBtn2' class='wgtBtn wgtBtnHdrIcon' style=''><div style='padding:3px;height:32px;' ><span class='sprite-isprt-wa-locate' ></span></div></div><div id='wgtBtn3' class='wgtBtn wgtBtnHdrIcon' style=''><div style='padding:3px;height:32px;' ><span class='sprite-isprt-wa-reload' ></span></div></div><h1 style='right:120px;' class=''>Ottawa Downtown, Ontario Air Quality.</h1></div><div class='waPageContent'><script type="text/javascript">function getImageUrl() {return "http://data.waqi.info/aqimg/_c3a08s8rSSzKzNf3LylJLE9UcMkvzysBYgA/";}function getTextNDays(n) {var tdays = ["Past 24 hours data","Past 48 hours data","Past 5 days data","Past week data"];return tdays[n];}function getModes() {return ["waqi","waqi","waqi","weather","weather","weather","weather"];}function getAqiModel() {if (window.aqiModel) return aqiModel;var model = {"timestamp":1743731517,"city":{"name":"Ottawa Downtown, Ontario","url":"https:\/\/aqicn.org\/city\/canada\/ontario\/ottawa-downtown\/","idx":23,"id":"Canada\/Ontario\/OttawaDowntown","geo":["45.434333","-75.676"],"key":"_c07MS0xJ1PfPK0ksyszX9y8pSSxPdMkvzysBYgA"},"iaqi":[{"p":"pm25","v":[13,13,42],"i":"Ottawa Downtown, Ontario, Canada pm25 (fine particulate matter) measured by Air Quality Ontario - the Ontario Ministry of the Environment and Climate Change. Values are converted from \u00b5g\/m3 to AQI levels using the EPA standard.","h":["2025\/04\/03 21:00:00",1,[[0,13],"aaeaeajmLaeDEH",[3,-4],"aa",[11,4],"aaDa",[2,4],"aa",[22,-4],"aaDaaDaeeaDDaaeeeeve",[2,-8],"aaDDIHD",[2,-4],"aa",[3,4],"aa",[2,4],"aa",[2,4],"aa",[4,-4],"aaeee",[2,0],"DaaD",[7,-4],"aaDa",[3,4],"aaDaea"]]},{"p":"o3","v":[27,11,35],"i":"Ottawa Downtown, Ontario, Canada o3 (ozone) measured by Air Quality Ontario - the Ontario Ministry of the Environment and Climate Change. 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Values are converted from \u00b5g\/m3 to AQI levels using the EPA standard.","h":["2025\/04\/03 21:00:00",10,[[0,19],"CBcchd",35,59,"T",49,54,-62,"e",-47,-51,"oMIPdFegcdGAabAjNKfjwuOiITraRfFcLEFB",[2,-1],"aaBacfbbaACbaCdbAbAfnBBk",28,93,49,-68,40,"b",35,-57,-91,"O",[2,-25],"hAgboIEcDbCECdhcGfcCkGDdbb",[2,14],35,"LCUTgMFBAddjKlhKGcGBaem"]]},{"p":"t","v":[9,-6,19],"i":"Ottawa Downtown, Ontario, Canada t (temp.) , expressed in degrees celcius and measured by wunderground.com","h":["2025\/04\/03 20:00:00",10,[[0,92],"nny",42,"dHcZ",-45,"RN",-32,"TDHDEaDCGDEDDcsjdbBaEHLMOLAbfddfefhhhknoefBGJHGMFDigddebceffeohfs",32,"GG",-29,"FJIICCBaaaaaBDaaaaaaaEaADaaCCaddB",[2,-4],"aaaaaehheBDIKKECDaebaecabeag"]]},{"p":"p","v":[1012,1003,1034],"i":"Ottawa Downtown, Ontario, Canada p (pressure:) measured by wunderground.com","h":["2025\/04\/03 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21:00"},"de":{"ago":"","time":"Aktualisiert am Donnerstag um 21"},"pt":{"ago":"","time":"Updated on quinta-feira 21:00"},"vi":{"ago":"","time":"C\u1eadp nh\u1eadt ng\u00e0y th\u1ee9 N\u0103m 21"},"it":{"ago":"","time":"Updated on Thursday 21:00"},"id":{"ago":"","time":"Updated on Thursday 21:00"},"nl":{"ago":"","time":"Updated on Thursday 21:00"},"fa":{"ago":"","time":"Updated on Thursday 21:00"},"th":{"ago":"","time":"Updated on Thursday 21:00"},"hu":{"ago":"","time":"Updated on Thursday 21:00"},"el":{"ago":"","time":"Updated on Thursday 21:00"},"ro":{"ago":"","time":"Updated on Thursday 21:00"},"bg":{"ago":"","time":"Updated on Thursday 21:00"},"ur":{"ago":"","time":"Updated on Thursday 21:00"},"hi":{"ago":"","time":"Updated on Thursday 21:00"},"ar":{"ago":"","time":"Updated on Thursday 21:00"},"sr":{"ago":"","time":"Updated on Thursday 21:00"},"bn":{"ago":"","time":"Updated on Thursday 21:00"},"bs":{"ago":"","time":"Updated on Thursday 21:00"},"hr":{"ago":"","time":"Updated on Thursday 21:00"},"tr":{"ago":"","time":"Updated on Thursday 21:00"},"uk":{"ago":"","time":"Updated on Thursday 21:00"},"cs":{"ago":"","time":"Updated on Thursday 21:00"},"be":{"ago":"","time":"Updated on Thursday 21:00"},"km":{"ago":"","time":"Updated on Thursday 21:00"},"lo":{"ago":"","time":"Updated on Thursday 21:00"}}},"i18n":{"name":{"en":"Ottawa Downtown, Ontario","zh-CN":"Ottawa Downtown, Ontario","ja":"Ottawa Downtown, Ontario","es":"Ottawa Downtown, Ontario","ko":"Ottawa Downtown, Ontario","ru":"Ottawa Downtown, Ontario","zh-TW":"Ottawa Downtown, Ontario","fr":"Ottawa Downtown, Ontario","pl":"Ottawa Downtown, Ontario","de":"Ottawa Downtown, Ontario","pt":"Ottawa Downtown, Ontario","vi":"Ottawa Downtown, Ontario","it":"Ottawa Downtown, Ontario","id":"Ottawa Downtown, Ontario","nl":"Ottawa Downtown, Ontario","fa":"Ottawa Downtown, Ontario","th":"Ottawa Downtown, Ontario","hu":"Ottawa Downtown, Ontario","el":"Ottawa Downtown, Ontario","ro":"Ottawa Downtown, Ontario","bg":"Ottawa 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m;}</script><div id='header' style=''><table id='aqi-header' style='text-align:center; width:100%;' cellpadding=0 cellspacing=0><script>$G(function(model) {$O('aqi-header', null, {backgroundColor: aqiColor(model.aqi, "b"),color: aqiColor(model.aqi, "f"),textShadow: "1px 0px 1px " + aqiColor(model.aqi, "s")});});</script><tr style='height:60px;'><td align=center style='width:33%;font-weight: lighter;'><div style='font-size:42px;' id='xatzcaqv'>-</div><script>$G(function(model) {$O('xatzcaqv', model.aqi, {color: colorMixer(aqiColor(model.aqi, "b"), aqiColor(model.aqi, "f"), .88)});});</script></td><td> </td><td align="left" style='width:100%;'><div class='headline item' id='aqi-lvl'></div><script>$G(function(model) {var lvl = getAqiLevel(model.aqi);var large = !isMobileUA && (getWindowWidth() > 800);$O('aqi-lvl', (large && lvl.n) ? lvl.n : lvl.m, {fontSize: large ? "42px" : lvl.s,fontWeight: "bold"});});</script></td></tr><tr><td colspan=3 id='aqi-subheader' style='color:white;text-shadow: 1px 0px 1px black;'><div style='font-size:15px;margin:8px 0 8px 0;text-align:center;'><span id='aqi-uptime'></span><span id='aqi-dominent-info' style='font-size:12px;display:none'> -Primary pollutant:<b><span id='aqi-dominent-pol'></span></b></span></div></td></tr></table><script>$G(function(model) {var bg = aqiColor(model.aqi, "b"),fg = aqiColor(model.aqi, "f");$O("aqi-subheader", null, {backgroundColor: colorMixer(bg, fg, .3)});var times = model.time.s;var utime = times[getLang()] || times.en;let stime = utime.time;if ("moment" in window) {try {var t = new Date(model.time.utc.s);if (!isNaN(t.getTime())) {stime = moment(t).format("lll");stime = aqi18n.get("updated_on_date").replace("__DATE__", stime);}} catch (e) {log("oh no", e);}}$O("aqi-uptime", stime);if (model.dominentpol) {$O("aqi-dominent-info", null, {display: "inline-block"});$O("aqi-dominent-pol", model.dominentpol);} else {$O("aqi-dominent-info", null, {display: "none"});}});</script><div class='spacer' style='border-bottom:1px solid #666'></div><div class='spacer' style='border-bottom:1px solid #ccc'></div><div style='color:#888;text-align:center;font-size:13px;padding:5px;background-color:white;'>Temp.: <span class='temp' format=b temp='9'><b>9</b>°C</span> - Wind: <b>3</b>m/s 0 - </div><div id='aqi-forecast-header' style='display:none;text-shadow: 1px 0px 1px white;padding: 0 0 8px 0;background-color:white;color:#888;'><center><div class='spacer' style='border-bottom:1px solid #ccc;width:18%;'></div></center><div id='aqift' style='font-size:15px;padding-top:5px;text-align:center;color:#ccc;'>Air Quality Forecast</div><div id='aqi-forecast-short'></div></div><script type="text/javascript">$G(function(model) {if (model.forecast && model.forecast.aqi && model.forecast.aqi.length) {$O("aqi-forecast-short", getAqiForecastBanner(model.forecast));$O("aqi-forecast-header", null, {display: ""});}});</script><div class='spacer' style='border-bottom:1px solid #ccc'></div><div class='spacer' style='border-bottom:1px solid #666'></div></div><div><table class='aqigraphtable' id='table'></table><script>$G(function(model) {$O("table", getAqiTable(model));resizeImage();});</script><div class='section-title'>SHARE</div><div id='wgtBtn4' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='height:33px;padding:0px;' class='sprite-isprt-wa-share'></span></td><td>Share: Ottawa Downtown, Ontario, Canada Air Quality Index <div id='aqi-share-aqi' style='display:inline-block'></div> <div id='aqi-share-lvl' style='display:inline-block'></div></td></tr></table></div><script>$G(function(model) {$O("aqi-share-aqi", aqiColorize(model.aqi, "aqi", "padding:2px;"));var lvl = getAqiLevel(model.aqi);$O("aqi-share-lvl", " (" + (lvl.n || lvl.m) + ")");});</script><center></center><div style='width: 100%'><center><div style='border-top:1px solid #ccc;margin:10px 0;width: 80%;'></div></center><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></div><div id='ntf-section' style='display:none' ><div class='section-title'>Looking for another city?</div><div id='ntf-btn' class='wgtBtn wgtBtnSnap'></div><div id='wgtBtn5' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='height:33px;padding:0px;' class='sprite-isprt-wa-locate'></span></td><td><div style=''>Auto locate the nearest city</div></td></tr></table></div><div id='wgtBtn6' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='height:33px;padding:0px;' class='sprite-isprt-wa-search'></span></td><td><div style=''>Choose another city AQI</div></td></tr></table></div></div><div id='aqi-history-stations'></div><script>try {capp.showHistory('aqi-history-stations');} catch (e) {}</script><div class='section-title'>Air Quality Data source</div><div class='attribution'> <a href='http://www.airqualityontario.com/' target=_feedsource>Air Quality Data provided by Air Quality Ontario - the Ontario Ministry of the Environment and Climate Change (<span class='link'>airqualityontario.com</span>)</a></div><div class='section-title'>Weather Information</div><center><div style='font-size:12px'>Current conditions for <b>Ottawa Downtown, Ontario</b> on measured on Thursday 21:00:</div><div style='font-size:50px'><span class='temp' temp='9'>9°C</span></div>Humidity: 61%<br>Pressure:: 1012mb<center><div style='width:25%;border-bottom:1px solid #888;margin-top:5px;margin-bottom:5px;'></div></center></center><div style='width:100%'><center><div style='border-top:1px solid #ccc;margin:10px 0;width: 50%;'></div></center><ins class="adsbygoogle" style="display:block;margin: 0 auto; float: none; display: block; text-align:center;" data-ad-client="ca-pub-0281575029452656" data-ad-slot="2455076269" data-ad-format="horizontal"></ins><script>(adsbygoogle = window.adsbygoogle || []).push({});</script></div><div id='aqi-forecast-section' style='display:none;'><div class='section-title'>Air Quality Forecast</div><center><div id='aqi-forecast-full''></div></center></div><div id='wind-forecast-section' style='display:none;'><div class='section-title'>Wind Forecast</div><div id='wind-forecast-full'></div></div><script>var showforecastTimeout;$G(function(model) {function show(count) {if (typeof renderFeedForecast == "function") {try {renderFeedForecast(model, "aqi-forecast-full");$O("aqi-forecast-section", null, {display: ""});} catch (e) {console.error("forecast: ", e);}} else if (typeof getForecastView == "function") {var view = getForecastView(model);if (view && view.type == "aqi") {$O("aqi-forecast-full", view.view);$O("aqi-forecast-section", null, {display: ""});} else {$O("aqi-forecast-full", view.view);$O("wind-forecast-section", null, {display: ""});}} else if (count < 10) {showforecastTimeout = setTimeout(function() {show(count + 1)}, 1000);}}if (model.forecast && model.forecast.aqi && model.forecast.aqi.length) {clearTimeout(showforecastTimeout);show(0);}});</script><div id='map-section' style='display:block;'><div class='section-title'>Ottawa Downtown, Ontario Air Pollution Map</div><div id='map_canvas' style='min-height: 420px;'></div><script type="text/javascript">function useMobileUserVoice() {return true;}function _mmv() {return true;}function _mwb() {return true;}function _mcz() {return 8;}function _mfsurl() { return "https:\/\/aqicn.org\/map\/canada\/ontario\/ottawa-downtown\/";}function _mtfsv() {return "full screen view";}</script><script>function _mgl() {return "en";}function _mtcm() {return "close map";}function _mapk() {return (function(){ var u = ""; decodeURIComponent("%603Z3F%5BWiynQ2tdN%7BuOTFmXYnukYhx0QSGUGYh8%5BB%3E%3E").split('').forEach(function(c){ u += String.fromCharCode(c.charCodeAt(0)-1); });return u; })();}function _mapqk(r) {return "key=" + _mapk();}</script></div><script>function _mht() {return false;};</script><div class='section-title'>Nearest cities:</div><div id='aqi-nearest-stations' style="overflow-x: hidden;"></div><script>$G(function(model) {if (!window.search) return;if (model.nearest && model.nearest.length) {$O("aqi-nearest-stations", search.citySearchFormatDataLarge(model.nearest));} else if (model.nearest_v2 && model.nearest_v2.length) {$O("aqi-nearest-stations", search.citySearchFormatDataLarge(model.nearest_v2));}});</script><div class='section-title'>Options</div><div class='waBtnGroupText' ></div><div class='waBtnGroupBox'><div id='wgtBtn7' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='height:33px;padding:0px;' class='sprite-isprt-wa-locate'></span></td><td>Auto locate the nearest city</td></tr></table></div><div id='wgtBtn8' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='height:33px;padding:0px;' class='sprite-isprt-wa-search'></span></td><td>Choose another city AQI</td></tr></table></div><div id='wgtBtnreload' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='height:33px;padding:0px;' class='sprite-isprt-wa-reload'></span></td><td>Load most recent AQI data</td></tr></table></div></div><div class='waBtnGroupText' ></div><div class='waBtnGroupBox'><div id='wgtBtnmapview' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='height:33px;padding:0px;' class='sprite-isprt-wa-map'></span></td><td>View all cities AQI on a map</td></tr></table></div><div id='wgtBtnwebview' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='height:33px;padding:0px;' class='sprite-isprt-wa-pc2'></span></td><td>Open normal webpage (instead of the mobile webapp version)</td></tr></table></div><div id='wgtBtnappdownload' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td></td><td><div>Download the Smartphone application</td></tr></table></div></div><div class='section-title'>About this app and widget</div><div class='waBtnGroupText' ></div><div class='waBtnGroupBox'><div id='wgtBtn9' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='height:33px;padding:0px;' class='sprite-isprt-wa-contact'></span></td><td>Contact the World Air Quality Index project team</td></tr></table></div><div id='wgtBtn10' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='height:33px;padding:0px;' class='sprite-isprt-wa-about'></span></td><td>Frequently Asked Questions</td></tr></table></div></div><div class='section-title'>Settings</div><div class='waBtnGroupText' ></div><div class='waBtnGroupBox'><div id='wgtBtn11' class='wgtBtn wgtBtnSnap' style=''><center><table class='min'><tr><td><div class="onoffswitch"><input type="checkbox" name="onoffswitch" class="onoffswitch-checkbox" id="waToggle11"><label class="onoffswitch-label" for="waToggle11"><div class="onoffswitch-inner"></div><div class="onoffswitch-switch"></div></label></div></td><td>-</td><td>Remember the selected city</td></tr></table></center></div><div id='wgtBtn12' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='height:33px;padding:0px;' class='sprite-isprt-wa-preference'></span></td><td>Temperature unit: <b><i id='tempunit'>Celcius</i></b></td></tr></table></div></div><div class='waBtnGroupText' >Language Settings:</div><div class='waBtnGroupBox'><div id='wgtBtnCN' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇨🇳</span></td><td><div>简体中文</td></tr></table></div><div id='wgtBtnJP' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇯🇵</span></td><td><div>日本</td></tr></table></div><div id='wgtBtnES' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇪🇸</span></td><td><div>español</td></tr></table></div><div id='wgtBtnKR' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇰🇷</span></td><td><div>한국의</td></tr></table></div><div id='wgtBtnRU' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇷🇺</span></td><td><div>русский</td></tr></table></div><div id='wgtBtnHK' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇭🇰</span></td><td><div>繁體中文</td></tr></table></div><div id='wgtBtnFR' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇫🇷</span></td><td><div>Francais</td></tr></table></div><div id='wgtBtnPL' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇵🇱</span></td><td><div>Polski</td></tr></table></div><div id='wgtBtnDE' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇩🇪</span></td><td><div>Deutsch</td></tr></table></div><div id='wgtBtnBR' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇧🇷</span></td><td><div>Português</td></tr></table></div><div id='wgtBtnVN' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇻🇳</span></td><td><div>Tiếng Việt</td></tr></table></div><div id='wgtBtnIT' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇮🇹</span></td><td><div>Italiano</td></tr></table></div><div id='wgtBtnID' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇮🇩</span></td><td><div>bahasa Indonesia</td></tr></table></div><div id='wgtBtnNL' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇳🇱</span></td><td><div>Nederlands</td></tr></table></div><div id='wgtBtnIR' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇮🇷</span></td><td><div>فارسی</td></tr></table></div><div id='wgtBtnTH' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇹🇭</span></td><td><div>ภาษาไทย</td></tr></table></div><div id='wgtBtnHU' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇭🇺</span></td><td><div>Magyar</td></tr></table></div><div id='wgtBtnGR' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇬🇷</span></td><td><div>Ελληνικά</td></tr></table></div><div id='wgtBtnRO' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇷🇴</span></td><td><div>Română</td></tr></table></div><div id='wgtBtnBG' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇧🇬</span></td><td><div>български</td></tr></table></div><div id='wgtBtnPK' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇵🇰</span></td><td><div>اردو</td></tr></table></div><div id='wgtBtnIN' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇮🇳</span></td><td><div>हिंदी</td></tr></table></div><div id='wgtBtnAE' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇦🇪</span></td><td><div>العربية</td></tr></table></div><div id='wgtBtnRS' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇷🇸</span></td><td><div>Српски</td></tr></table></div><div id='wgtBtnBD' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇧🇩</span></td><td><div>বাংলা</td></tr></table></div><div id='wgtBtnBA' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇧🇦</span></td><td><div>босански</td></tr></table></div><div id='wgtBtnHR' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇭🇷</span></td><td><div>hrvatski</td></tr></table></div><div id='wgtBtnTR' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇹🇷</span></td><td><div>Türkçe</td></tr></table></div><div id='wgtBtnUA' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇺🇦</span></td><td><div>українська</td></tr></table></div><div id='wgtBtnCZ' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇨🇿</span></td><td><div>čeština</td></tr></table></div><div id='wgtBtnBY' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇧🇾</span></td><td><div>беларускі</td></tr></table></div><div id='wgtBtnKH' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇰🇭</span></td><td><div>ខ្មែរ</td></tr></table></div><div id='wgtBtnLA' class='wgtBtn wgtBtnSnap' style=''><table class='button-with-icon'><tr><td><span style='font-size:28px;'>🇱🇦</span></td><td><div>ລາວ</td></tr></table></div></div><a name="infoaqi"></a><div class='section-title'>About the Air Quality and Pollution Measurement:</div><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 i18n='generic'>Air Pollution Level</td><td i18n='generic'>Health Implications</td><td i18n='generic'>Cautionary Statement (for PM2.5)</td></tr></thead><tr style="background-color:#009966;"><td class='aqiwtxt' nowrap="true">0 - 50</td><td class='aqiwtxt' i18n='generic'>Good</td><td class='aqiwtxt' i18n='generic'>Air quality is considered satisfactory, and air pollution poses little or no risk</td><td class='aqiwtxt' i18n='generic'>None</td></tr><tr style="background-color:#ffde33" class='aqibtxt'><td class='aqibtxt' nowrap="true">51 -100</td><td class='aqibtxt' i18n='generic'>Moderate</td><td class='aqibtxt' i18n='generic'>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' i18n='generic'>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' i18n='generic'>Unhealthy for Sensitive Groups</td><td class='aqibtxt' i18n='generic'>Members of sensitive groups may experience health effects. The general public is not likely to be affected.</td><td class='aqibtxt' i18n='generic'>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' i18n='generic'>Unhealthy</td><td class='aqiwtxt' i18n='generic'>Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects</td><td class='aqiwtxt' i18n='generic'>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' i18n='generic'>Very Unhealthy</td><td class='aqiwtxt' i18n='generic'>Health warnings of emergency conditions. The entire population is more likely to be affected.</td><td class='aqiwtxt' i18n='generic'>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' i18n='generic'>Hazardous</td><td class='aqiwtxt' i18n='generic'>Health alert: everyone may experience more serious health effects</td><td class='aqiwtxt' i18n='generic'>Everyone should avoid all outdoor exertion</td></tr></table></div><br></center><center><span style='font-size:60%'><i>This page has been generated on Friday, Apr 4th 2025, 09:56 am CST</i></span></center><div style='font-size:60%;text-align:center' id='xtradbginfo'>-</div><center><img src='https://waqi.info/icons/logo.e201.png?_=1743731801' alt='World Air Quality Index project' border=0 height=50></center><br></div><script type="text/javascript">aqi18n.register('WA_SHOW_CURRENT_LOCATION', "Do you want to see __CITY__ AQI instead?");aqi18n.register('updated', "Updated");aqi18n.register('updated_on_date', "Updated on __DATE__");</script></div></div><div class='waPage waPageHidden' id='waPageShare' style='-ms-touch-action: none'><div class='waPageHeader' id='waHdrShare' ><div id='wgtBtn13' class='wgtBtn wgtBtnHdrIcon' style=''><div style='padding:3px;height:32px;' ><span class='sprite-isprt-wa-back' ></span></div></div><h1 style='right:40px;' class=''>Ottawa Downtown, Ontario Air Quality.</h1></div><div class='waPageContent'><h2><span style='color:#aaa'>Share: “</span>Ottawa Downtown, Ontario, Canada Air Quality is Good - on Thursday, Apr 3rd 2025, 21:00 pm<span style='color:#aaa'>”</span></h2><br><center><div class='ui-share-btns'><a id='share-facebook' href='https://www.facebook.com/dialog/share?app_id=643196515742584&display=popup&href=https%3A%2F%2Faqicn.org%2Fsnapshot%2Fcanada%2Fontario%2Fottawa-downtown%2F20250403-21%2F%3Fmp&redirect_uri=https%3A%2F%2Faqicn.org%2Fsnapshot%2Fcanada%2Fontario%2Fottawa-downtown%2F20250403-21%2F%3Fmp' class='ui-share-btn' title=''><svg viewBox="0 0 24 24" width=24px height=24px xmlns="http://www.w3.org/2000/svg"><path d="M24 12.073c0-6.627-5.373-12-12-12s-12 5.373-12 12c0 5.99 4.388 10.954 10.125 11.854v-8.385H7.078v-3.47h3.047V9.43c0-3.007 1.792-4.669 4.533-4.669 1.312 0 2.686.235 2.686.235v2.953H15.83c-1.491 0-1.956.925-1.956 1.874v2.25h3.328l-.532 3.47h-2.796v8.385C19.612 23.027 24 18.062 24 12.073z"/></svg></a><script>try{tlite.enable(document.getElementById('share-facebook'),{text:"<div style='font-size:120%'>Share on facebook:<\/div>Ottawa Downtown, Ontario, Canada Air Quality is Good - on Thursday, Apr 3rd 2025, 21:00 pm<br>(https:\/\/aqicn.org\/snapshot\/canada\/ontario\/ottawa-downtown\/20250403-21\/?mp)"});}catch(e){}</script><a id='share-twitter' href='http://www.twitter.com/share?url=https%3A%2F%2Faqicn.org%2Fsnapshot%2Fcanada%2Fontario%2Fottawa-downtown%2F20250403-21%2F%3Fmp' class='ui-share-btn' title=''><svg version="1.0" xmlns="http://www.w3.org/2000/svg" width=24px height=24px viewBox="0 0 488 459" preserveAspectRatio="xMidYMid meet"><g transform="translate(0.000000,459.000000) scale(0.100000,-0.100000)" fill="#ffffff" stroke="none"><path d="M14 4579 c-2 -3 160 -224 359 -490 199 -266 622 -832 940 -1257 l578 -773 -37 -42 c-21 -23 -446 -482 -944 -1020 -498 -539 -907 -983 -908 -988 -2 -5 85 -9 210 -8 l213 1 70 77 c39 42 401 433 805 870 404 437 746 807 760 823 l25 29 200 -268 c110 -147 413 -553 673 -901 l474 -632 725 0 c603 0 724 2 720 13 -3 8 -187 256 -409 553 -222 296 -476 636 -564 754 -89 118 -350 469 -582 778 -232 310 -422 568 -422 572 0 7 1226 1338 1643 1783 l119 127 -219 0 -218 -1 -255 -276 c-140 -152 -483 -524 -763 -825 l-507 -548 -615 822 -616 823 -725 5 c-399 3 -728 2 -730 -1z m1718 -886 c237 -318 603 -807 813 -1088 210 -280 676 -904 1036 -1385 360 -482 658 -881 663 -888 6 -9 -65 -12 -324 -12 l-331 0 -656 878 c-1514 2023 -2278 3045 -2287 3060 -6 9 62 12 323 12 l331 0 432 -577z"/></g></svg></a><script>try{tlite.enable(document.getElementById('share-twitter'),{text:"<div style='font-size:120%'>Share on twitter:<\/div>Ottawa Downtown, Ontario, Canada Air Quality is Good - on Thursday, Apr 3rd 2025, 21:00 pm<br>(https:\/\/aqicn.org\/snapshot\/canada\/ontario\/ottawa-downtown\/20250403-21\/?mp)"});}catch(e){}</script><a id='share-reddit' href='https://reddit.com/submit?url=https%3A%2F%2Faqicn.org%2Fsnapshot%2Fcanada%2Fontario%2Fottawa-downtown%2F20250403-21%2F%3Fmp&title=Ottawa+Downtown%2C+Ontario%2C+Canada+Air+Quality+is+Good+-++on+Thursday%2C+Apr+3rd+2025%2C+21%3A00+pm' class='ui-share-btn' title=''><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width=24px height=24px version="1.1" viewBox="0 0 256 256" xml:space="preserve"><g style="stroke: none; 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'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);})();</script><script>settings.waToggleInit('RememberCity','waToggle11');;</script><script type='text/javascript'>aqi18n.register('tooltip-aqi',"Air Quality Index");aqi18n.register('tooltip-more',"Click for more information");aqi18n.register('tooltip-nodata',"Sorry, no air quality data available");aqi18n.register('tooltip-updated',"updated %1");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. The general public is not likely to be affected.");aqi18n.register('aqi-level-100-150',"Unhealthy for sensitive groups");aqi18n.register('aqi-level-100-150-html',"<div style='font-size:66%'>Unhealthy for sensitive groups<\/div>");aqi18n.register('aqi-implication-150-200',"Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects");aqi18n.register('aqi-level-150-200',"Unhealthy");aqi18n.register('aqi-implication-200-300',"Health warnings of emergency conditions. The entire population is more likely to be affected.");aqi18n.register('aqi-level-200-300',"Very Unhealthy");aqi18n.register('aqi-level-200-300-html',"<div style='line-height:1.1'><span style='font-size:16px;'>Very<\/span><br>Unhealthy<\/div>");aqi18n.register('aqi-implication-300-500',"Health alert: everyone may experience more serious health effects");aqi18n.register('aqi-level-300-500',"Hazardous");aqi18n.register('updated',"Updated");aqi18n.register('updated_on_date',"Updated on __DATE__");</script><script type='text/javascript'>try { var img = new Image; img.src = '/images/logo/regular.png?f=m&_='+((new Date()).getTime()); } catch(e) {} ['initButtons','settings.initTempUnit','initResizer','capp.initPullToRefresh'].forEach(function(f){try{eval(f+'()');}catch(e){log(f,':',e)}});</script><script src='/jscripts/moment/bundle.min.js?_=20200103.150752&type=script'></script><script type='text/javascript'>moment.locale("en")</script><script type='text/javascript'>$RG()</script></body></html>