City report · Quebec, Canada
Sherbrooke Air quality today
Air quality in Sherbrooke currently reads AQI 17 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 17
Good
- PM2.5, fine particles (µg/m³)
- 3.0
- tree cover
- 40.0%
- trees in this area
- 119K
- more trees needed
- 0
Measured across a 2 km radius around Mont-Bellevue, Sherbrooke, QC, Canada (12.57 km²), from a satellite image of Aug 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Sherbrooke · AQI 17 (Good)
Sherbrooke's tree count comes to 119,255 trees across 11.93 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Sherbrooke today: AQI 17, Good
Main pollutant: PM2.5 · Observed Nov 11, 10:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Sherbrooke - Parc Sy, 2 km away
Health signal
Air quality is satisfactory for everyone.
PM2.5
3.0
PM10
—
NO₂
—
O₃
—
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 Sherbrooke's daily AQI at 29 on average, from 15 on Nov 8 to an hourly peak of 61 on Nov 7.
This is the US EPA AQI. How it differs from Canada's AQHI
Where Sherbrooke stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Sherbrooke: Healthy tree cover
40.0% tree cover against a 30% healthy-neighborhood target, across 11.93 km² of land.
Trees in this area
119,255
Target trees
119,255
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Sherbrooke lost?
Since 2001, the area within 10 km of Sherbrooke has lost about 887 hectares of forest (about 1,200 football pitches): 5.3% of the forest it had in 2000. Most of it (77%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area about 6 km west of the city center.
- Forest lost since 2001
- 887 haabout 1,200 football pitches
- Share of its forest
- 5.3%of what there was in 2000
- Cleared for good
- 683 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 27 hectares a year in 2021–2025, down from 56 hectares a year in 2016–2020. The worst year was 2019, when about 72 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 | 21 ha | 9 ha | 29 ha |
| 2002 | 22 ha | 5 ha | 27 ha |
| 2003 | 10 ha | 4 ha | 13 ha |
| 2004 | 32 ha | 22 ha | 53 ha |
| 2005 | 38 ha | 13 ha | 50 ha |
| 2006 | 30 ha | 16 ha | 46 ha |
| 2007 | 18 ha | 10 ha | 28 ha |
| 2008 | 13 ha | 4 ha | 16 ha |
| 2009 | 20 ha | 10 ha | 30 ha |
| 2010 | 34 ha | 9 ha | 43 ha |
| 2011 | 29 ha | 2 ha | 30 ha |
| 2012 | 56 ha | 2 ha | 58 ha |
| 2013 | 5 ha | 2 ha | 6 ha |
| 2014 | 13 ha | 7 ha | 19 ha |
| 2015 | 18 ha | under 1 ha | 19 ha |
| 2016 | 25 ha | 3 ha | 28 ha |
| 2017 | 68 ha | 2 ha | 70 ha |
| 2018 | 54 ha | 13 ha | 67 ha |
| 2019 | 49 ha | 23 ha | 72 ha |
| 2020 | 36 ha | 9 ha | 45 ha |
| 2021 | 20 ha | 7 ha | 27 ha |
| 2022 | 22 ha | 4 ha | 26 ha |
| 2023 | 21 ha | 13 ha | 33 ha |
| 2024 | 13 ha | 9 ha | 22 ha |
| 2025 | 20 ha | 7 ha | 27 ha |
What is causing deforestation around Sherbrooke?
- Towns and roadscleared for good64% · 570 ha
- Loggingcan grow back21% · 188 ha
- Mining and energycleared for good7.6% · 67 ha
Also: farms, pasture and plantations, 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
- 17,500 ha
- Forest in 2020
- 17,800 ha
- Overall change
- +318 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Sherbrooke stayed about the same size, at about 17,800 hectares: new forest grew on about 979 hectares, and about 662 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 Sherbrooke
Same 2 km radius, same index — so they compare directly.
- Trois-Rivières116.5 km
Canada
- Tree cover
- 25%
- Air quality
- 16
- Longueuil123.0 km
Canada
- Tree cover
- 29%
- Air quality
- 19
- Montréal132.3 km
Canada
- Tree cover
- 44%
- Air quality
- 17
- 134.0 km
- Tree cover
- 26%
- Air quality
- 17
- Terrebonne140.2 km
Canada
- Tree cover
- 33%
- Air quality
- 17
- Laval141.0 km
Canada
- Tree cover
- 31%
- Air quality
- 16
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Frequently asked
Questions about Sherbrooke
What is the air quality (AQI) in Sherbrooke right now?
The latest reading for Sherbrooke shows an AQI of 17 (Good), measured Nov 11, 10:00 local time by the Sherbrooke - Parc Sy ground monitoring station, 2 km away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Sherbrooke today?
At AQI 17 (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 Sherbrooke been like this week?
Over the last 7 days, the CAMS air-quality model put Sherbrooke's daily AQI at 29 on average, from 15 on Nov 8 to an hourly peak of 61 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Sherbrooke'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 Sherbrooke lost since 2001?
Since 2001, the area within 10 km of Sherbrooke has lost about 887 hectares of forest (about 1,200 football pitches): 5.3% of the forest it had in 2000. Most of it (77%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss is slowing down: about 27 hectares a year in 2021–2025, down from 56 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Sherbrooke stayed about the same size, at about 17,800 hectares: new forest grew on about 979 hectares, and about 662 hectares were lost.
What is the tree count in Sherbrooke?
Sherbrooke has an estimated 119,255 trees across the 11.93 km² of land measured — 40.0% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Sherbrooke need?
Sherbrooke has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Sherbrooke's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Mont-Bellevue, 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 Mont-Bellevue; the tree count is an estimate derived from that cover.
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