Air quality in Oshawa

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

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What is the pollen count in Oshawa today?

Tree pollenNone
Grass pollenNone
Weed pollenNone
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What is the current weather in Oshawa?

Weather icon
Wind3.4 mp/h
Pressure29.6 Hg

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#cityUS AQI
1The national flag of International Guelph, Ontario


2The national flag of International Brampton, Ontario


3The national flag of International Hamilton, Ontario


4The national flag of International Oakville, Ontario


5The national flag of International Burlington, Ontario


6The national flag of International Kitchener, Ontario


7The national flag of International Toronto, Ontario


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9The national flag of International Quebec City, Quebec


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(local time)


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Real-time Oshawa air quality ranking

#stationUS AQI
1 Ontario Ministry of the Environment Oshawa


2 Duval Street


3 Edward Street East


4 Oshawa Station


(local time)


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What is the current air quality in Oshawa?

Air pollution levelAir quality indexMain pollutant
Moderate 52 US AQIPM2.5



PM2.5 concentration in Oshawa is currently 1.9 times the WHO annual air quality guideline value

Health Recommendations

What is the current air quality in Oshawa?

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Sensitive groups should reduce outdoor exercise
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Close your windows to avoid dirty outdoor air
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Sensitive groups should wear a mask outdoors
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Sensitive groups should run an air purifier


Oshawa air quality index (AQI) forecast

DayPollution levelWeatherTemperatureWind
Thursday, Jun 20

Good 34 AQI US

Human face indicating AQI level
Weather icon
73.4° 64.4°
Wind rotating 162 degree 6.7 mp/h
Friday, Jun 21

Good 42 AQI US

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Weather icon
69.8° 64.4°
Wind rotating 126 degree 11.2 mp/h
Saturday, Jun 22

Good 47 AQI US

Human face indicating AQI level
Weather icon
73.4° 60.8°
Wind rotating 219 degree 20.1 mp/h

Moderate 52 AQI US

Human face indicating AQI level
Weather icon 100%
73.4° 60.8°
Wind rotating 219 degree 20.1 mp/h
Monday, Jun 24

Good 32 AQI US

Human face indicating AQI level
Weather icon 100%
69.8° 59°
Wind rotating 304 degree 26.8 mp/h
Tuesday, Jun 25

Moderate 52 AQI US

Human face indicating AQI level
Weather icon 80%
68° 57.2°
Wind rotating 222 degree 15.7 mp/h
Wednesday, Jun 26

Moderate 58 AQI US

Human face indicating AQI level
Weather icon 100%
75.2° 57.2°
Wind rotating 319 degree 13.4 mp/h
Thursday, Jun 27

Good 20 AQI US

Human face indicating AQI level
Weather icon
64.4° 51.8°
Wind rotating 310 degree 15.7 mp/h
Friday, Jun 28

Good 21 AQI US

Human face indicating AQI level
Weather icon
66.2° 50°
Wind rotating 127 degree 8.9 mp/h
Saturday, Jun 29

Moderate 62 AQI US

Human face indicating AQI level
Weather icon 100%
78.8° 60.8°
Wind rotating 212 degree 22.4 mp/h

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What is the air quality of Oshawa?

Oshawa is a city located in Ontario, one of the thirteen different provinces found in Canada. Situated on the Lake Ontario shoreline, it is also in close proximity to the downtown region of Toronto, a factor that will bring with it a large amount of human movement which can have an effect on the air quality. The city is home to some prominent centers for higher education, which attracts more people from abroad, adding to the current population count of more than 166 thousand people. As well as having a significant presence with universities, Oshawa is also home to major corporations such as General Motors Canada, as well as the southern portion of the city being home to many industrial sites.

In 2019, Oshawa came in with a PM2.5 reading of 6.2 μg/m³, a very respectable level of air quality that placed it well within the World Health Organizations (WHO's) target goal for the best quality of air at 10 μg/m³ or less, with the closest to 0 being the most optimal and ultimate end goal. Despite having some months of the year where the PM2.5 rose slightly higher, Oshawa still has a very good level of air cleanliness, with its PM2.5 reading of 6.2 μg/m³ placing it in 4099th place out of all cities ranked worldwide, as well as in 100th place out of all cities ranked in Canada.

What causes polluted air in Oshawa?

Whilst Oshawa maintains a very good year round quality of air, with all of its months falling within the WHO's target bracket of 10 μg/m³ or under, it still stands to reason that with any level of industrial and human activity, the PM2.5 count will be higher than it would be if no such activity were taking plus, thus making the air more polluted.

One of the main causes would be from the automobile industry, which remains just as prevalent in Oshawa as it does in nearly every city round the world. Due to the steadily rising population, as well as a growing number of vehicle ownership, there would be a large amount of pollution related to exhaust fumes. With many cars and other personal vehicles such as motorbikes on the road, there would be related pollutants from the fuel combustion process, as well as microscopic particles of rubber that come from tires being worn down over time. When large amounts of these particles accumulate, it can cause significant damage to both wildlife and human health, due to the damaging nature of PM10 and other similar small particles.

Along with cars, there are also heavy duty vehicles, which include among them buses, trucks, lorries and even snow ploughs, which see their use during colder months. Due to their larger size and weight, as well as running on diesel fuels much of the time, subsequently they put out large amounts of pollution and hazardous particulate matter, based on the combustion of diesel fuels. Other sources of pollution in Oshawa include power plant areas, often forced into overdrive during colder months to provide energy to homes and businesses for heating, which leads to more coal being burnt and thus more pollutive release. Along with smaller causes such as the burning of firewood, the occasional natural fire as well as construction areas or repair sites, the first two factors would play the largest part in raising pollution levels in Oshawa.

When is the air quality at its cleanest in Oshawa?

Observing the data taken over the course of 2019, it becomes apparent that Oshawa saw a period of time in which the air pollution levels dropped even further. Whilst the entire year came in with very respectable readings (with Canada being a country that has some of the best air quality levels in the world, despite a few issues here and there), there was a further noticeable drop in the PM2.5 count.

The months of August through to October are when Oshawa has the cleanest quality of air, even more free from polluting smoke, haze or smog. These months came in with PM2.5 readings of 4.9 μg/m³, 4.4 μg/m³ and 5 μg/m³ respectively, displaying some very good qualities of air and making September the cleanest month of the year with its reading of 4.4 μg/m³.

Who is most vulnerable to polluted air in Oshawa?

Whilst there are no people that are immune to the adverse effects brought on by over exposure to pollution, there are specifically some key demographics that are affected more significantly than others may be. These groups include ones such as the elderly, young children, pregnant mothers, as well as those with preexisting health conditions or compromised immune systems, and those with a heightened sensitivity to certain chemical pollutants.

What type of pollutants are found in the air in Oshawa?

Considering that a majority of Oshawa’s pollution stems from sources such as car exhaust fumes, as well as other sites of combustion such as factories or power plants, there would thus be a large amount of related pollutants and fine particulate matter in the air.

The main ones stemming from vehicular use include chemical compounds such as nitrogen dioxide (NO2), sulfur dioxide (SO2), along with carbon monoxide (CO). The first two can add to instances of acid rain, as well as acting as irritants to the lining of the lungs, causing inflammation and possibly triggering off adverse health effects such as asthma or other respiratory conditions.

Other pollutants include ones such as volatile organic compounds (VOC's) and black carbon. Both of these find their origin from the incomplete combustion of fossil fuels and organic material such as firewood or charcoal. Due to this wide array of different sources, they can be emitted from cars, construction sites, power plants and even the act of burning firewood at homes. Black carbon is a major component of soot and a potent carcinogen when inhaled, as well as having climate changing properties.

VOC's are also particularly dangerous due to their volatile nature allowing them to maintain a gaseous state even at much lower temperatures, thus easier to respire by the general population and cause ill health effects. Some examples of VOC's include ones such as benzene, toluene, xylene, methylene chloride and formaldehyde.

Oshawa air quality data attribution


Data validated and calibrated by IQAirData validated and calibrated by IQAir

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