City report · Ontario, Canada
Vaughan Air quality today
Air quality in Vaughan currently reads AQI 33 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 33
Good
- PM2.5, fine particles (µg/m³)
- 6.0
- tree cover
- 19.3%
- trees in this area
- 60.6K
- more trees needed
- 33.6K
Measured across a 2 km radius around Concord, Vaughan, ON, Canada (12.57 km²), from a satellite image of Sep 12, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Vaughan · AQI 33 (Good)
Vaughan's tree count comes to 60,633 trees across 12.57 km², 11 points below the 30% tree-cover level considered healthy for this area, so roughly 33,615 more trees would close the gap.
Air quality detail
Air quality in Vaughan today: AQI 33, 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 · Toronto North, 6.7 km away
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.0
PM10
—
NO₂
—
O₃
21.6
SO₂
0.0
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 Vaughan's daily AQI at 27 on average, from 10 on Nov 9 to an hourly peak of 53 on Nov 4.
This is the US EPA AQI. How it differs from Canada's AQHI
Where Vaughan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Vaughan: Below target
19.3% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
60,633
Target trees
94,248
More trees needed
33,615
CO₂ if planted / yr
739.5 t
Deforestation · 2001–2025
How much forest has Vaughan lost?
Since 2001, the area within 10 km of Vaughan has lost about 126 hectares of forest (about 180 football pitches): 3.1% of the forest it had in 2000. Most of it (87%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 126 haabout 180 football pitches
- Share of its forest
- 3.1%of what there was in 2000
- Cleared for good
- 110 hadeforestation: turned into farms, mines or towns
The worst year was 2005, when about 16 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 | 2 ha | 13 ha |
| 2002 | 9 ha | under 1 ha | 9 ha |
| 2003 | 1 ha | under 1 ha | 2 ha |
| 2004 | 6 ha | 1 ha | 7 ha |
| 2005 | 15 ha | under 1 ha | 16 ha |
| 2006 | 3 ha | under 1 ha | 3 ha |
| 2007 | 4 ha | under 1 ha | 5 ha |
| 2008 | 5 ha | under 1 ha | 6 ha |
| 2009 | 4 ha | under 1 ha | 5 ha |
| 2010 | 2 ha | under 1 ha | 2 ha |
| 2011 | 1 ha | under 1 ha | 2 ha |
| 2012 | 3 ha | under 1 ha | 4 ha |
| 2013 | 1 ha | under 1 ha | 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | 12 ha | under 1 ha | 12 ha |
| 2016 | 4 ha | 1 ha | 5 ha |
| 2017 | 3 ha | under 1 ha | 4 ha |
| 2018 | 4 ha | under 1 ha | 4 ha |
| 2019 | 7 ha | 1 ha | 8 ha |
| 2020 | 3 ha | under 1 ha | 3 ha |
| 2021 | 1 ha | under 1 ha | 2 ha |
| 2022 | 2 ha | under 1 ha | 2 ha |
| 2023 | 2 ha | under 1 ha | 2 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | 7 ha | 4 ha | 11 ha |
What is causing deforestation around Vaughan?
- Towns and roadscleared for good86% · 108 ha
- Farms, pasture and plantationscleared for good1.4% · 2 ha
- Unknown causescause unknown13% · 16 ha
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
- 8,430 ha
- Forest in 2020
- 8,850 ha
- Overall change
- +418 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Vaughan grew from about 8,430 hectares to 8,850 hectares, a net gain of about 418 hectares (+5%). New forest grew on about 633 hectares, while 214 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
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Frequently asked
Questions about Vaughan
What is the air quality (AQI) in Vaughan right now?
The latest reading for Vaughan shows an AQI of 33 (Good), measured Nov 11, 10:00 local time by the Toronto North ground monitoring station, 6.7 km away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Vaughan today?
At AQI 33 (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 Vaughan been like this week?
Over the last 7 days, the CAMS air-quality model put Vaughan's daily AQI at 27 on average, from 10 on Nov 9 to an hourly peak of 53 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Vaughan'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 Vaughan lost since 2001?
Since 2001, the area within 10 km of Vaughan has lost about 126 hectares of forest (about 180 football pitches): 3.1% of the forest it had in 2000. Most of it (87%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Vaughan grew from about 8,430 hectares to 8,850 hectares, a net gain of about 418 hectares (+5%). New forest grew on about 633 hectares, while 214 hectares were lost.
What is the tree count in Vaughan?
Vaughan has an estimated 60,633 trees across the 12.57 km² measured — 19.3% tree cover, 11 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Vaughan need?
Vaughan needs roughly 33,615 more trees to close a 11-point shortfall against its 30% tree-cover target — about 739.5 t of extra CO₂ absorbed per year once grown.
How are Vaughan's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Concord, 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 Concord; the tree count is an estimate derived from that cover.
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