Toronto air quality today
Air quality in Toronto is currently moderate, with a European index of 51. The concentration of PM2.5 particles is 13 µg/m³ and PM10 is 14 µg/m³. Very sensitive people may notice mild symptoms during prolonged outdoor exertion. Over the next 24 hours the air will be cleanest around 11:00 AM (index 21) and most polluted around 11:00 PM (index 55).
Current air quality in Toronto
Moderate
51EAQI
Very sensitive people may notice mild symptoms during prolonged outdoor exertion.
- PM2.5
- 13 µg/m³
- PM10
- 14 µg/m³
- Ozone
- 30 µg/m³
Model estimate (Open-Meteo / CAMS) for the city location. It may differ from readings at local stations.
The next 24 hours at a glance
- Index now
- 51
- Moderate
- Average index
- 38
- Good
- Cleanest air
- 11:00 AM
- index 21
- Most polluted hour
- 11:00 PM
- index 55
- PM2.5
- 13 µg/m³
- PM10
- 14 µg/m³
Air quality in Toronto by the hour
- 51Now
- 501 AM
- 492 AM
- 473 AM
- 444 AM
- 415 AM
- 416 AM
- 417 AM
- 418 AM
- 359 AM
- 2610 AM
- 2111 AM
- 2312 PM
- 241 PM
- 242 PM
- 253 PM
- 254 PM
- 295 PM
- 376 PM
- 437 PM
- 478 PM
- 509 PM
- 5310 PM
- 5511 PM
European Air Quality Index (EAQI) by the hour, a model estimate. A shorter bar means cleaner air.
Pollen in Toronto
Pollen data is not available for this location. The pollen model only covers Europe.
Frequently asked questions
How is the air quality in Toronto today?
It is currently moderate (European index 51). PM2.5 is 13 µg/m³, PM10 is 14 µg/m³ and ozone is 30 µg/m³. The average for the next 24 hours is around 38.
What does the European Air Quality Index (EAQI) mean?
The EAQI is a scale used by the European Environment Agency. Up to 20 is excellent air, up to 40 good, up to 60 moderate, up to 80 poor, up to 100 very poor, and above 100 extremely poor. The index is calculated from the concentration of fine particles (PM2.5 and PM10), ozone, nitrogen dioxide and sulphur dioxide.
What are PM2.5 and PM10 particles?
They are tiny particles in the air with a diameter of up to 2.5 and 10 micrometres. They come from traffic, heating and industry, and there are the most of them in winter, on calm days without wind or rain. PM2.5 is more dangerous because it penetrates deep into the lungs.
Are these measurements or estimates?
This is an atmospheric model estimate (Open-Meteo / CAMS) for the city location, not a reading from a local station. Values may therefore differ from station data in some parts of the city.
When is the air cleanest?
The air is usually cleaner during stronger winds, after rain and in the afternoon, when the cold layer near the ground breaks up. It is worst early in the morning and in the evening in the cold part of the year, when heating and traffic increase.