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

3 weather warnings in effect for Canada 😷 Air quality🌊 Coastal / marine🌫️ Fog

Latest air quality data: Toronto

Locations: Toronto Montréal » Vancouver » Calgary » Ottawa » Edmonton » Mississauga » Winnipeg » Québec » Hamilton » Brampton » Kitchener » Surrey » Halifax » London » Okanagan » Victoria » Markham » Buffalo » Oshawa »

Pollution and air quality forecast for Toronto. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for Toronto:

particulate matter (PM2.5) dust - 7 (Good)
particulate matter (PM10) suspended dust - 7 (Good)
ozone (O3) - 83 (Moderate)
nitrogen dioxide (NO2) - 26 (Good)
sulfur dioxide (SO2) - 7 (Good)
carbon monoxide (CO) - 307 (Good)

Real-time Air Quality Index (AQI) for Toronto, Wednesday, August 26, 2026: 2.

AQI 2 Moderate

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

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

What is the current level of PM2.5 in Toronto? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 7 (Good) For comparison, the highest level of PM2.5 in Toronto 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 Toronto? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Toronto is: 7 (Good)

How is the O3 level today in Toronto? (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))
307 (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 307 (Good)

Data on air pollution from recent days in Toronto

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	351 Good	280 Good	169 Good	168 Good	201 Good	216 Good	235 Good	205 Good

data source »

Quality of life in Toronto

Green and Parks in the City

Toronto 73%

United States: 70% Venezuela: 41% Iceland: 72%

particulate matter PM2.5

Toronto 9 (Good)

Pleasure of spending time in the city

Toronto 74%

United States: 75% The Bahamas: 53% Venezuela: 41% Iceland: 89%

particulate matter PM10

Toronto 16 (Good)

Air Pollution

Toronto 34%

United States: 29% The Bahamas: 52% Venezuela: 59% Iceland: 13%

Garbage Disposal

Toronto 71%

United States: 71% The Bahamas: 29% Venezuela: 18% Iceland: 79%

Availability and quality of drinking water

Toronto 82%

United States: 71% The Bahamas: 55% Venezuela: 28% Iceland: 96%

Cleanliness and tidiness

Toronto 62%

United States: 60% The Bahamas: 35% Venezuela: 22% Iceland: 75%

Noise and Light pollution

Toronto 48%

United States: 47% The Bahamas: 39% Venezuela: 47% Iceland: 23%

Water Pollution

Toronto 38%

United States: 44% The Bahamas: 58% Venezuela: 76% Iceland: 8.4%

Source: Numbeo

Toronto

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 307 (Good)

carbon monoxide (CO)

Toronto

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	205	235	216	201	168	169	280	351

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

🌦️ Weather · 16-day Forecast — Toronto

16-day weather forecast for Toronto: today around 19°C (rain), lows near 14°C. Daily temperature and conditions, updated every day. Strong wind (about 22 km/h) is actively clearing smog and dust away.

☀️ UV Index · 16-day Forecast — Toronto

The UV index in Toronto today is 5.5 (moderate) — unprotected fair skin can burn in about 35 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Toronto — compare nearby locations.

Markham 5 µg/m³
Mississauga 7 µg/m³
Brampton 7 µg/m³
Oshawa 3 µg/m³
Kitchener 3 µg/m³
Montréal 11 µg/m³
Vancouver 10 µg/m³
Calgary 8 µg/m³

Frequently asked questions

Is the air safe to breathe in Toronto today?

The current average PM2.5 across Toronto 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 Toronto?

Right now PM2.5 in Toronto 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 Toronto?

Over the past week, the highest daily PM2.5 in Toronto was recorded on Wednesday, August 26 (about 9 µg/m³).

What is the UV index in Toronto today?

The UV index in Toronto today is 5.5 (moderate) — unprotected fair skin can burn in about 35 minutes.

Does today's wind help disperse smog in Toronto?

Strong wind (about 22 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.