City report · British Columbia, Canada
Chilliwack Air quality today
Air quality in Chilliwack currently reads AQI 17 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 17
Good
- PM2.5, fine particles (µg/m³)
- 3.1
- tree cover
- 23.3%
- trees in this area
- 73.2K
- more trees needed
- 21.0K
Measured across a 2 km radius around Chilliwack Proper Village West, Chilliwack, BC, Canada (12.57 km²), from a satellite image of Sep 11, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Chilliwack · AQI 17 (Good)
Chilliwack's tree count comes to 73,199 trees across 12.57 km², 7 points below the 30% tree-cover level considered healthy for this area, so roughly 21,049 more trees would close the gap.
Air quality detail
Air quality in Chilliwack today: AQI 17, Good
Main pollutant: PM2.5 · Observed Nov 11, 07:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Chilliwack, 1.4 km away
Health signal
Air quality is satisfactory for everyone.
PM2.5
3.1
PM10
6.0
NO₂
13.0
O₃
15.7
SO₂
0.5
CO
229.1
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 Chilliwack's daily AQI at 30 on average, from 13 on Nov 10 to an hourly peak of 92 on Nov 4.
This is the US EPA AQI. How it differs from Canada's AQHI
Where Chilliwack stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Chilliwack: Below target
23.3% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
73,199
Target trees
94,248
More trees needed
21,049
CO₂ if planted / yr
463.1 t
Deforestation · 2001–2025
How much forest has Chilliwack lost?
Since 2001, the area within 10 km of Chilliwack has lost about 1,400 hectares of forest (about 2,000 football pitches): 11% of the forest it had in 2000. Most of it (76%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km southeast of the city center.
- Forest lost since 2001
- 1,400 haabout 2,000 football pitches
- Share of its forest
- 11%of what there was in 2000
- Cleared for good
- 1,060 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 45 hectares a year in 2021–2025, against 60 hectares a year in 2016–2020. The worst year was 2017, when about 126 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 | 7 ha | 19 ha |
| 2002 | 25 ha | 15 ha | 40 ha |
| 2003 | 25 ha | 25 ha | 51 ha |
| 2004 | 51 ha | 41 ha | 92 ha |
| 2005 | 53 ha | 9 ha | 62 ha |
| 2006 | 84 ha | 8 ha | 92 ha |
| 2007 | 74 ha | 9 ha | 84 ha |
| 2008 | 64 ha | 4 ha | 67 ha |
| 2009 | 47 ha | 3 ha | 51 ha |
| 2010 | 32 ha | 40 ha | 72 ha |
| 2011 | 26 ha | 33 ha | 59 ha |
| 2012 | 59 ha | 8 ha | 66 ha |
| 2013 | 14 ha | 4 ha | 19 ha |
| 2014 | 31 ha | 29 ha | 60 ha |
| 2015 | 34 ha | 6 ha | 40 ha |
| 2016 | 39 ha | 24 ha | 63 ha |
| 2017 | 119 ha | 7 ha | 126 ha |
| 2018 | 37 ha | 3 ha | 40 ha |
| 2019 | 31 ha | under 1 ha | 31 ha |
| 2020 | 35 ha | 3 ha | 39 ha |
| 2021 | 48 ha | 3 ha | 51 ha |
| 2022 | 30 ha | 12 ha | 41 ha |
| 2023 | 46 ha | 5 ha | 50 ha |
| 2024 | 19 ha | 16 ha | 35 ha |
| 2025 | 27 ha | 22 ha | 49 ha |
What is causing deforestation around Chilliwack?
- Towns and roadscleared for good41% · 570 ha
- Farms, pasture and plantationscleared for good24% · 329 ha
- Loggingcan grow back23% · 315 ha
Also: mining and energy, storms, floods and other natural causes, 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
- 12,700 ha
- Forest in 2020
- 12,500 ha
- Overall change
- −191 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Chilliwack stayed about the same size, at about 12,500 hectares: new forest grew on about 475 hectares, and about 665 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 Chilliwack
What is the air quality (AQI) in Chilliwack right now?
The latest reading for Chilliwack shows an AQI of 17 (Good), measured Nov 11, 07:00 local time by the Chilliwack ground monitoring station, 1.4 km away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Chilliwack 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 Chilliwack been like this week?
Over the last 7 days, the CAMS air-quality model put Chilliwack's daily AQI at 30 on average, from 13 on Nov 10 to an hourly peak of 92 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Chilliwack'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 Chilliwack lost since 2001?
Since 2001, the area within 10 km of Chilliwack has lost about 1,400 hectares of forest (about 2,000 football pitches): 11% of the forest it had in 2000. Most of it (76%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss has stayed about the same: about 45 hectares a year in 2021–2025, against 60 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Chilliwack stayed about the same size, at about 12,500 hectares: new forest grew on about 475 hectares, and about 665 hectares were lost.
What is the tree count in Chilliwack?
Chilliwack has an estimated 73,199 trees across the 12.57 km² measured — 23.3% tree cover, 7 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Chilliwack need?
Chilliwack needs roughly 21,049 more trees to close a 7-point shortfall against its 30% tree-cover target — about 463.1 t of extra CO₂ absorbed per year once grown.
How are Chilliwack's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Chilliwack Proper Village West, 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 Chilliwack Proper Village West; the tree count is an estimate derived from that cover.
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