City report · Quebec, Canada
Trois-Rivières Air quality today
Air quality in Trois-Rivières currently reads AQI 16 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 16
Good
- PM2.5, fine particles (µg/m³)
- 1.9
- tree cover
- 24.7%
- trees in this area
- 57.2K
- more trees needed
- 12.3K
Measured across a 2 km radius around Trois-Rivières, QC, Canada (12.57 km²), from a satellite image of Sep 11, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Trois-Rivières · AQI 16 (Good)
Trois-Rivières's tree count comes to 57,189 trees across 9.26 km² of land, 5 points below the 30% tree-cover level considered healthy for this area, so roughly 12,271 more trees would close the gap.
Air quality detail
Air quality in Trois-Rivières today: AQI 16, Good
Main pollutant: Ozone · Observed Nov 11, 10:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Bécancour, 8.8 km away · median of 2 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
1.9
PM10
—
NO₂
—
O₃
33.4
SO₂
—
CO
—
Data: OpenAQ · AirNow
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Trois-Rivières's daily AQI at 28 on average, from 17 on Nov 8 to an hourly peak of 55 on Nov 4.
This is the US EPA AQI. How it differs from Canada's AQHI
Where Trois-Rivières stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Trois-Rivières: Below target
24.7% tree cover against a 30% healthy-neighborhood target, across 9.26 km² of land.
Trees in this area
57,189
Target trees
69,460
More trees needed
12,271
CO₂ if planted / yr
270.0 t
Deforestation · 2001–2025
How much forest has Trois-Rivières lost?
Since 2001, the area within 10 km of Trois-Rivières has lost about 907 hectares of forest (about 1,300 football pitches): 7.8% of the forest it had in 2000. Most of it (89%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from September 2017 of a 5 × 5 km area about 7 km west of the city center.
- Forest lost since 2001
- 907 haabout 1,300 football pitches
- Share of its forest
- 7.8%of what there was in 2000
- Cleared for good
- 810 hadeforestation: turned into farms, mines or towns
The worst year was 2007, when about 110 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 11 ha | under 1 ha | 11 ha |
| 2002 | 9 ha | under 1 ha | 10 ha |
| 2003 | 11 ha | under 1 ha | 11 ha |
| 2004 | 51 ha | under 1 ha | 52 ha |
| 2005 | 45 ha | 2 ha | 47 ha |
| 2006 | 39 ha | 1 ha | 40 ha |
| 2007 | 96 ha | 14 ha | 110 ha |
| 2008 | 33 ha | under 1 ha | 34 ha |
| 2009 | 66 ha | 4 ha | 70 ha |
| 2010 | 48 ha | 2 ha | 49 ha |
| 2011 | 30 ha | under 1 ha | 30 ha |
| 2012 | 32 ha | 1 ha | 33 ha |
| 2013 | 8 ha | 18 ha | 27 ha |
| 2014 | 20 ha | 3 ha | 23 ha |
| 2015 | 16 ha | 10 ha | 25 ha |
| 2016 | 27 ha | 8 ha | 35 ha |
| 2017 | 17 ha | 2 ha | 19 ha |
| 2018 | 42 ha | 3 ha | 45 ha |
| 2019 | 22 ha | under 1 ha | 22 ha |
| 2020 | 36 ha | under 1 ha | 37 ha |
| 2021 | 43 ha | 2 ha | 45 ha |
| 2022 | 42 ha | 14 ha | 55 ha |
| 2023 | 17 ha | 2 ha | 19 ha |
| 2024 | 34 ha | 5 ha | 39 ha |
| 2025 | 16 ha | 3 ha | 19 ha |
What is causing deforestation around Trois-Rivières?
- Towns and roadscleared for good85% · 769 ha
- Loggingcan grow back9.2% · 84 ha
- Farms, pasture and plantationscleared for good4.6% · 41 ha
Also: unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Forest gained and lost, 2000–2020
- Forest in 2000
- 11,900 ha
- Forest in 2020
- 12,200 ha
- Overall change
- +356 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Trois-Rivières grew from about 11,900 hectares to 12,200 hectares, a net gain of about 356 hectares (+3%). New forest grew on about 838 hectares, while 482 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city center, a wider area than the report above, because forest is usually lost at a city's edges.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
In the same region
Measured cities near Trois-Rivières
Same 2 km radius, same index — so they compare directly.
- Terrebonne111.1 km
Canada
- Tree cover
- 33%
- Air quality
- 14
- 112.0 km
- Tree cover
- 26%
- Air quality
- 14
- Québec114.4 km
Canada
- Tree cover
- 22%
- Air quality
- 13
- Sherbrooke116.5 km
Canada
- Tree cover
- 40%
- Air quality
- 19
- Longueuil116.5 km
Canada
- Tree cover
- 29%
- Air quality
- 14
- 119.4 km
- Tree cover
- 68%
- Air quality
- 14
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Frequently asked
Questions about Trois-Rivières
What is the air quality (AQI) in Trois-Rivières right now?
The latest reading for Trois-Rivières shows an AQI of 16 (Good), measured Nov 11, 10:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Bécancour, 8.8 km away). The main pollutant is Ozone. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Trois-Rivières today?
At AQI 16 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Trois-Rivières been like this week?
Over the last 7 days, the CAMS air-quality model put Trois-Rivières's daily AQI at 28 on average, from 17 on Nov 8 to an hourly peak of 55 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Trois-Rivières's AQI the same as Canada's AQHI?
No. Airleaf shows the US EPA Air Quality Index (AQI), the scale used by IQAir and most air-quality apps. Canada's Air Quality Health Index (AQHI), from Environment and Climate Change Canada, runs from 1 to 10 and above: 1–3 low risk, 4–6 moderate, 7–10 high and over 10 very high. It combines ozone, nitrogen dioxide and fine particles into one health-risk number, so it isn't a converted AQI, and the two can move differently, especially in wildfire smoke.
How much forest has the area around Trois-Rivières lost since 2001?
Since 2001, the area within 10 km of Trois-Rivières has lost about 907 hectares of forest (about 1,300 football pitches): 7.8% of the forest it had in 2000. Most of it (89%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Trois-Rivières grew from about 11,900 hectares to 12,200 hectares, a net gain of about 356 hectares (+3%). New forest grew on about 838 hectares, while 482 hectares were lost.
What is the tree count in Trois-Rivières?
Trois-Rivières has an estimated 57,189 trees across the 9.26 km² of land measured — 24.7% tree cover, 5 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Trois-Rivières need?
Trois-Rivières needs roughly 12,271 more trees to close a 5-point shortfall against its 30% tree-cover target — about 270.0 t of extra CO₂ absorbed per year once grown.
How are Trois-Rivières's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Trois-Rivières, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Trois-Rivières; the tree count is an estimate derived from that cover.
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