European AQIFresh
39 index
Environmental exposure · Verified city evidence
Toronto Air quality
Review current particulate and air-quality indicators with source dates, freshness and confidence kept visible. Placeivo reports measurements rather than inventing a city health score.
3 city indicators
1 source
Fresh evidence freshness
3/3 confidence recorded
Every figure below keeps its source, data date and verification freshness visible.
At a glance
Air quality indicators for Toronto
This page uses city-specific evidence only for the main indicators. CA context is shown separately when available.
PM2.5Fresh
11.1 µg/m³
PM10Fresh
11.4 µg/m³
How to read it
AQI, PM2.5 and PM10 describe different parts of the air picture
The AQI value is an index intended to summarize current air conditions, while PM2.5 and PM10 are particulate-matter measurements. They should not be treated as interchangeable values or as a permanent rating of Toronto.
Air conditions can change with weather, season, local activity and measurement timing. Placeivo therefore keeps the observation date and latest check visible and avoids converting a single reading into a broad city health or quality-of-life verdict.
Recent trend
Toronto air quality over the last 7 days
Daily values below are averages calculated from hourly European AQI, PM2.5 and PM10 observations. This recent window shows short-term variation; it is not a long-term annual air-quality rating.
| Date | European AQI | PM2.5 | PM10 |
|---|---|---|---|
| Sep 9 | 33.8 | 7.4 µg/m³ | 7.6 µg/m³ |
| Sep 10 | 28.4 | 6.6 µg/m³ | 6.8 µg/m³ |
| Sep 11 | 33.3 | 5.2 µg/m³ | 5.2 µg/m³ |
| Sep 12 | 40.0 | 6.6 µg/m³ | 6.7 µg/m³ |
| Sep 13 | 41.1 | 17.4 µg/m³ | 18.0 µg/m³ |
| Sep 14 | 24.8 | 3.0 µg/m³ | 3.2 µg/m³ |
| Sep 15 | 27.4 | 4.4 µg/m³ | 4.6 µg/m³ |
Source: Open-Meteo Air Quality API. Daily averages are Placeivo calculations from hourly source values.
Evidence interpretation
What the latest Toronto air readings say
The latest stored measurements report a European AQI of 39, PM2.5 of 11.1 µg/m³ and PM10 of 11.4 µg/m³.
These are time-specific environmental measurements. They are useful as a current snapshot, but a single reading cannot establish typical annual air quality or a permanent health ranking for Toronto.
Evidence & methodology
Where these air quality figures come from
Placeivo keeps source attribution, the date represented by the observation, the latest verification check and confidence metadata separate. This makes it possible to inspect the evidence instead of relying on an unexplained score.
Continue researching
Put this evidence in context
A topic page is one part of a city decision. Use the full city profile to review other verified areas, or compare Toronto with another city using shared evidence.