Smog in Mississauga — Live Data: AQI, Fine Dust, Wind, UV and Health Advice

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Latest air quality data: Mississauga
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Pollution and air quality forecast for Mississauga. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for Mississauga:
  1. particulate matter (PM2.5) dust - 7 (Good)
  2. particulate matter (PM10) suspended dust - 7 (Good)
  3. ozone (O3) - 83 (Moderate)
  4. nitrogen dioxide (NO2) - 26 (Good)
  5. sulfur dioxide (SO2) - 7 (Good)
  6. carbon monoxide (CO) - 374 (Good)
Real-time Air Quality Index (AQI) for Mississauga, Wednesday, August 26, 2026: 2.

air quality index: 1
AQI 2 Moderate

What is the air quality in Mississauga today? Is the air polluted in Mississauga?. Is there smog?

Today (Wednesday, August 26, 2026) air quality is moderate in Mississauga. Some pollutants in Mississauga may slightly affect very few hypersensitive individuals. Air pollutants in Mississauga may cause minor breathing discomfort to sensitive people.


What is the current level of PM2.5 in Mississauga? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 7 (Good) For comparison, the highest level of PM2.5 in Mississauga in the last 7 days was: 9 (Wednesday, August 26, 2026) and the lowest: 4 (Monday, August 24, 2026).

What is the level of PM10 today in Mississauga? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Mississauga is: 7 (Good)

How is the O3 level today in Mississauga? (ozone (O3))
83 (Moderate)

How high is the level of NO2? (nitrogen dioxide (NO2))
26 (Good)

What is the level of SO2 pollution? (sulfur dioxide (SO2))
7 (Good)

How high is the CO level? (carbon monoxide (CO))
374 (Good)



Current data Wednesday, August 26, 2026 at 9:00 PM

PM2,5 7 (Good)

PM10 7 (Good)

O3 83 (Moderate)

NO2 26 (Good)

SO2 7 (Good)

CO 374 (Good)

Data on air pollution from recent days in Mississauga

index 2026-08-26 2026-08-25 2026-08-24 2026-08-23 2026-08-22 2026-08-21 2026-08-20 2026-08-19
pm25 9
Good		 6
Good		 4
Good		 4
Good		 6
Good		 5
Good		 8
Good		 9
Good
pm10 9
Good		 6
Good		 4
Good		 4
Good		 6
Good		 6
Good		 8
Good		 9
Good
o3 61
Good		 57
Good		 46
Good		 60
Good		 85
Moderate		 70
Moderate		 56
Good		 78
Moderate
no2 27
Good		 14
Good		 9
Good		 8
Good		 14
Good		 17
Good		 21
Good		 14
Good
so2 9
Good		 5
Good		 3
Good		 3
Good		 5
Good		 6
Good		 6
Good		 5
Good
co 332
Good		 249
Good		 142
Good		 152
Good		 204
Good		 213
Good		 227
Good		 195
Good
data source »

Mississauga

Wednesday, August 26, 2026 at 9:00 PM

PM2,5 6.5 (Good)

particulate matter (PM2.5) dust

PM10 6.5 (Good)

particulate matter (PM10) suspended dust

O3 83 (Moderate)

ozone (O3)

NO2 26 (Good)

nitrogen dioxide (NO2)

SO2 6.9 (Good)

sulfur dioxide (SO2)

CO 374 (Good)

carbon monoxide (CO)

Mississauga

index 2026-08-19 2026-08-20 2026-08-21 2026-08-22 2026-08-23 2026-08-24 2026-08-25 2026-08-26
pm25 8.9 8 5.5 6.2 3.9 4 5.9 9.1
pm10 9.1 8.2 5.6 6.3 4 4 6 9.2
o3 78 56 70 85 60 46 57 61
no2 14 21 17 14 8.2 8.7 14 27
so2 4.6 5.9 6.2 5 2.7 3 4.5 9.2
co 195 227 213 204 152 142 249 332

* Pollution data source: https://openaq.org () The data is licensed under CC-By 4.0

🌦️ Weather · 16-day Forecast — Mississauga

🌦️ WEATHER · 16-DAY FORECASTMississauga🌧️18°RainToday · ↑19° ↓14°💨 7 km/h · 💧 79%Mon24.08🌧️19°14°Tue25.08☀️24°16°Wed26.08☁️29°17°Thu27.08🌧️27°18°Fri28.08☀️24°14°Sat29.08☁️24°13°Sun30.08🌧️23°19°Mon31.08🌧️24°21°Tue1.09🌧️28°20°Wed2.09🌤️28°18°Thu3.09🌧️26°19°Fri4.09🌧️34°19°Sat5.09🌧️34°23°Sun6.09🌧️27°21°Mon7.09🌧️26°21°Tue8.09🌤️31°21°pollution-alert.com · August 27, 2026

16-day weather forecast for Mississauga: today around 19°C (rain), lows near 14°C. Daily temperature and conditions, updated every day. Strong wind (about 25 km/h) is actively clearing smog and dust away.

☀️ UV Index · 16-day Forecast — Mississauga

☀️ UV INDEX · 16-DAY FORECASTMississauga03681111+5.2UV MODERATEtoday, day maxSeek shade around midday. SPF 30+, sunglasses and ahat for longer stays.⏱ Unprotected fair skin can burn in about 40 min5Wed26.086Thu27.086Fri28.086Sat29.084Sun30.084Mon31.086Tue1.096Wed2.096Thu3.096Fri4.096Sat5.096Sun6.095Mon7.096Tue8.092Wed9.096Thu10.090-2 low3-5 moderate6-7 high8-10 very high11+ extremepollution-alert.com · August 27, 2026

The UV index in Mississauga today is 5.2 (moderate) — unprotected fair skin can burn in about 40 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Mississauga — compare nearby locations.

Frequently asked questions

Is the air safe to breathe in Mississauga today?
The current average PM2.5 across Mississauga is about 7 µg/m³, rated “Good”. Air quality is good — outdoor activities are fine for everyone.
What is the current PM2.5 level in Mississauga?
Right now PM2.5 in Mississauga averages about 7 µg/m³ (“Good”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.
Which day last week had the worst air in Mississauga?
Over the past week, the highest daily PM2.5 in Mississauga was recorded on Wednesday, August 26 (about 9 µg/m³).
What is the UV index in Mississauga today?
The UV index in Mississauga today is 5.2 (moderate) — unprotected fair skin can burn in about 40 minutes.
Does today's wind help disperse smog in Mississauga?
Strong wind (about 25 km/h) is actively clearing smog and dust away.
How is air quality measured?
Air quality here is based on PM2.5 — the concentration of fine particulate matter in µg/m³. Lower values mean cleaner air. Data is updated daily from Open-Meteo.