Air quality in Mississauga

Air quality index (AQI) and PM2.5 air pollution in Mississauga

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What is the current weather in Mississauga?

Weather icon
WeatherClear sky
Wind6 mp/h
Pressure30.1 Hg

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Real-time Canada city ranking

#cityUS AQI
1 Lac La Biche, Alberta


2 Cold Lake South, Alberta


3 Yellowknife, Northwest Territories


4 Bonnyville, Alberta


5 Meadow Lake, Saskatchewan


6 Athabasca, Alberta


7 Air Ronge, Saskatchewan


8 Fort Chipewyan, Alberta


9 Camrose, Alberta


10 Beaumont, Alberta


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Real-time Mississauga air quality ranking

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1 Ratray Marsh


2 Candela Drive


3 Mississauga


(local time)


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What is the current air quality in Mississauga?

Air pollution levelAir quality indexMain pollutant
Moderate 72 US AQItrendPM2.5



PM2.5 concentration in Mississauga is currently 4.4 times the WHO annual air quality guideline value

Health Recommendations

How to protect from air pollution in Mississauga?

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An IQAir purifier icon Sensitive groups should run an air purifier
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A man cycling icon Sensitive groups should reduce outdoor exercise


Mississauga air quality index (AQI) forecast

DayPollution levelWeatherTemperatureWind
Saturday, May 27

Good 38 US AQI

Human face indicating AQI level
Weather icon73.4°55.4°
Wind rotating 340 degree

4.5 mp/h

Sunday, May 28

Good 36 US AQI

Human face indicating AQI level
Weather icon69.8°57.2°
Wind rotating 97 degree

8.9 mp/h

Monday, May 29

Good 47 US AQI

Human face indicating AQI level
Weather icon75.2°57.2°
Wind rotating 136 degree

6.7 mp/h

Tuesday, May 30

Moderate 68 US AQI

Human face indicating AQI level
Weather icon86°60.8°
Wind rotating 142 degree

4.5 mp/h


Moderate 72 US AQI

Human face indicating AQI level
Weather icon80.6°64.4°
Wind rotating 125 degree

6.7 mp/h

Thursday, Jun 1

Moderate 60 US AQI

Human face indicating AQI level
Weather icon20%82.4°64.4°
Wind rotating 355 degree

8.9 mp/h

Friday, Jun 2

Good 49 US AQI

Human face indicating AQI level
Weather icon40%69.8°59°
Wind rotating 94 degree

11.2 mp/h

Saturday, Jun 3

Good 33 US AQI

Human face indicating AQI level
Weather icon66.2°53.6°
Wind rotating 108 degree

15.7 mp/h

Sunday, Jun 4

Good 32 US AQI

Human face indicating AQI level
Weather icon68°50°
Wind rotating 325 degree

6.7 mp/h

Monday, Jun 5

Good 21 US AQI

Human face indicating AQI level
Weather icon64.4°53.6°
Wind rotating 340 degree

15.7 mp/h

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Historic air quality graph for Mississauga

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Reduce your air pollution exposure in Mississauga


Is Mississauga a city with a good quality of air?

Mississauga is a city located in Ontario, one of the thirteen provinces of Canada and the most populous of them all, with the city itself also being home to some 721 thousand people as of 2016. It is a city that is undergoing some rapid economic growth, coupled with the growth of its population along with further infrastructure. This can be it part attributed to its short distance from Toronto, becoming a lively business and economic hub that grew throughout the last few decades and continues on until today. As a result, whilst it still maintains a very good quality of air, much like many cities in Canada, there are slightly higher readings as a result of these activities, which is an inevitability due to many different factors, some of which will be discussed in further detail.

Over the course of 2019, Mississauga came in with a PM2.5 reading of 6.9 μg/m³ as its yearly average. This is a very respectable reading when compared to many cities throughout the world, due to Canada’s propensity towards having a large number of cities with a great quality of air. This reading of 6.9 μg/m³ placed it into the World Health Organizations (WHO's) target goal for great air quality at 10 μg/m³ or under, a coveted rating to achieve and an indicator that whilst there may be months where the PM2.5 levels rise somewhat, overall, Mississauga has air that is very safe for its inhabitants to breathe. This reading also placed it in 3830th place out of all cities ranked worldwide, as well as 73rd place out of all cities ranked in Canada.

What are some contributing causes to pollution in Mississauga?

With a growing population and infrastructure, Mississauga would be subject to the same pollutive sources that cause problems throughout the world, but with the added bonus of having not only good preventative measures in place (in regards to reducing air pollution) but suitable meteorological conditions that can assist in the dispersal of accumulated pollutants. However, one of the causes would be the ever prevalent automobiles, with their presence around the world as one of the leading causes of year round ambient pollution. With a well connected series of roads with other major cities and provinces in Canada, there would also be a large amount of bigger vehicles inhabiting the roads, which often put out far more pollution than smaller, personal vehicles do, as well as running on diesel fuel more often than not, another compounding factor.

Other causes of pollution would be naturally occurring ones such as the occasional wildfire that can happen outside a city’s limits, with strong winds blowing the smoke over to nearby cities and causing a spike in PM2.5 readings. These are a rarer occurrence however, and more consistent ones seen with a city experiencing further growth and population increases include particulate matter and industrial effluence from factories, power plants and other such facilities, as well as construction sites also having their part to play.

When is Mississauga’s air at its most polluted?

With data available over the course of 2019, with concise measurements and recordings, it can be observed as to when the pollution levels rose higher than what was normal for the rest of the year. Due to the cleanliness of the overall air quality, it is slightly harder than other cities to get a clear cut picture of when pollution levels get out of control, but there are still periods where they are slightly higher nevertheless.

Around the month of November is when a significant jump in pollution levels was seen, with the previous month of October coming in at a respectable reading of 4.5 μg/m³. This was followed by a reading of 8.7 μg/m³ in November, nearly double the amount of the previous month and indicative that a change had taken place in the air quality levels. This continued on into December, with a reading of 8.6 μg/m³. The early months of the year also showed very slight elevations, although they were subject to fluctuations between higher and lower numbers. January, June and July all came in with PM2.5 readings of 7.4 μg/m³, 7.4 μg/m³ and 8.3 μg/m³ respectively, with the months in between dropping in their readings slightly. This shows that the months of November and December were the most polluted out of the entire year, with November being the highest at 8.7 μg/m³.

When is the air quality in Mississauga at its cleanest?

Following on from the previous question, as stated there were fluctuations between pollution levels, essentially moving from ‘slightly more polluted’ to ‘slightly less polluted’, a hint that the entire year was still essentially clean and with a good quality of air. However, there were several months that stood out as falling into the slightly less polluted category. These were April, May, August, September and October, which all came in with PM2.5 readings of 6.2 μg/m³, 6.1 μg/m³, 5.9 μg/m³, 6.4 μg/m³ and 4.5 μg/m³ respectively. This made October the cleanest month out of the year for 2019 at 4.5 μg/m³.

What are some of the pollutants found in the atmosphere within Mississauga?

The main pollutants in the air within Mississauga would be ones related to all the sources mentioned earlier, with automobiles having a whole host of different types of pollution that they can put out into the atmosphere. Among these are lesser recognized ones, which besides emanating from the exhaust and engine, parts such as the wheels can also be offending sources, particularly among the more sizeable and heavy duty vehicles such as trucks and lorries, as well as buses. Vast amounts of finely ground rubber particles have been estimated to have entered the environment throughout the country, and this holds true for Mississauga. These can have an effect on the environment and ecosystem as well as the health of those who inhale them.

Other pollutants include nitrogen dioxide (NO2) and sulfur dioxide (SO2), as well as black carbon, the main component of soot and a potent carcinogen when inhaled.

Where is the cleanest air quality in Mississauga?

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