Ottawa air quality today
Air quality in Ottawa is currently excellent, with a European index of 15. The concentration of PM2.5 particles is 2 µg/m³ and PM10 is 2 µg/m³. The air is clean and safe to spend time outdoors. Over the next 24 hours the air will be cleanest around 1:00 AM (index 15) and most polluted around 9:00 PM (index 56).
Current air quality in Ottawa
Excellent
15EAQI
The air is clean and safe to spend time outdoors.
- PM2.5
- 2 µg/m³
- PM10
- 2 µg/m³
- Ozone
- 44 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
- 15
- Excellent
- Average index
- 31
- Good
- Cleanest air
- 1:00 AM
- index 15
- Most polluted hour
- 9:00 PM
- index 56
- PM2.5
- 2 µg/m³
- PM10
- 2 µg/m³
Air quality in Ottawa by the hour
- 15Now
- 162 AM
- 183 AM
- 214 AM
- 245 AM
- 286 AM
- 327 AM
- 348 AM
- 309 AM
- 2310 AM
- 1811 AM
- 1912 PM
- 221 PM
- 232 PM
- 243 PM
- 234 PM
- 215 PM
- 356 PM
- 477 PM
- 548 PM
- 569 PM
- 5610 PM
- 5611 PM
- 5612 AM
European Air Quality Index (EAQI) by the hour, a model estimate. A shorter bar means cleaner air.
Pollen in Ottawa
Pollen data is not available for this location. The pollen model only covers Europe.
Frequently asked questions
How is the air quality in Ottawa today?
It is currently excellent (European index 15). PM2.5 is 2 µg/m³, PM10 is 2 µg/m³ and ozone is 44 µg/m³. The average for the next 24 hours is around 31.
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.