City report · British Columbia, Canada
Langley Air quality today
Air quality in Langley currently reads AQI 22 (Good): Air quality is satisfactory for everyone.
AQI 22
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 4.0
- tree cover
- 28.1%
- trees in this area
- 88.2K
- more trees needed
- 6.0K
Measured across a 2 km radius around Langley, BC, Canada (12.57 km²), from a satellite image of Sep 6, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Langley · AQI 22 (Good)
Langley's tree count comes to 88,190 trees across 12.56 km² of land, 2 points below the 30% tree-cover level considered healthy for this area, so roughly 5,963 more trees would close the gap.
Air quality detail
Air quality in Langley today: AQI 22, Good
Main pollutant: PM2.5 · Observed Nov 11, 09:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Surrey East, 4.4 km away · median of 2 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
4.0
PM10
8.0
NO₂
14.3
O₃
30.4
SO₂
0.3
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 Langley's daily AQI at 54 on average, from 39 on Nov 8 to an hourly peak of 99 on Nov 4.
This is the US EPA AQI. How it differs from Canada's AQHI
Where Langley stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Langley: Below target
28.1% tree cover against a 30% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
88,190
Target trees
94,153
More trees needed
5,963
CO₂ if planted / yr
131.2 t
Deforestation · 2001–2025
How much forest has Langley lost?
Since 2001, the area within 10 km of Langley has lost about 1,850 hectares of forest (about 2,600 football pitches): 16% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from September 2017 of a 5 × 5 km area about 5 km north of the city center.
- Forest lost since 2001
- 1,850 haabout 2,600 football pitches
- Share of its forest
- 16%of what there was in 2000
- Cleared for good
- 1,840 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 66 hectares a year in 2021–2025, against 86 hectares a year in 2016–2020. The worst year was 2008, when about 166 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 | 67 ha | under 1 ha | 67 ha |
| 2002 | 47 ha | under 1 ha | 47 ha |
| 2003 | 79 ha | under 1 ha | 79 ha |
| 2004 | 97 ha | under 1 ha | 98 ha |
| 2005 | 114 ha | 1 ha | 115 ha |
| 2006 | 136 ha | 1 ha | 137 ha |
| 2007 | 26 ha | under 1 ha | 26 ha |
| 2008 | 165 ha | 1 ha | 166 ha |
| 2009 | 73 ha | under 1 ha | 73 ha |
| 2010 | 41 ha | under 1 ha | 41 ha |
| 2011 | 3 ha | under 1 ha | 3 ha |
| 2012 | 93 ha | under 1 ha | 94 ha |
| 2013 | 30 ha | under 1 ha | 30 ha |
| 2014 | 66 ha | under 1 ha | 66 ha |
| 2015 | 47 ha | under 1 ha | 47 ha |
| 2016 | 105 ha | 1 ha | 106 ha |
| 2017 | 93 ha | under 1 ha | 94 ha |
| 2018 | 89 ha | under 1 ha | 89 ha |
| 2019 | 83 ha | under 1 ha | 83 ha |
| 2020 | 57 ha | under 1 ha | 57 ha |
| 2021 | 50 ha | under 1 ha | 50 ha |
| 2022 | 93 ha | under 1 ha | 94 ha |
| 2023 | 87 ha | under 1 ha | 87 ha |
| 2024 | 45 ha | under 1 ha | 45 ha |
| 2025 | 51 ha | under 1 ha | 52 ha |
What is causing deforestation around Langley?
- Towns and roadscleared for good74% · 1,360 ha
- Farms, pasture and plantationscleared for good26% · 477 ha
Also: logging, 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
- 13,700 ha
- Forest in 2020
- 12,700 ha
- Overall change
- −1,020 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Langley shrank from about 13,700 hectares to 12,700 hectares, a net loss of about 1,020 hectares (−7.4%). New forest grew on about 390 hectares, but 1,410 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 Langley
What is the air quality (AQI) in Langley right now?
The latest reading for Langley shows an AQI of 22 (Good), measured Nov 11, 09:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Surrey East, 4.4 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Langley today?
At AQI 22 (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 Langley been like this week?
Over the last 7 days, the CAMS air-quality model put Langley's daily AQI at 54 on average, from 39 on Nov 8 to an hourly peak of 99 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Langley'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 Langley lost since 2001?
Since 2001, the area within 10 km of Langley has lost about 1,850 hectares of forest (about 2,600 football pitches): 16% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss has stayed about the same: about 66 hectares a year in 2021–2025, against 86 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Langley shrank from about 13,700 hectares to 12,700 hectares, a net loss of about 1,020 hectares (−7.4%). New forest grew on about 390 hectares, but 1,410 hectares were lost.
What is the tree count in Langley?
Langley has an estimated 88,190 trees across the 12.56 km² of land measured — 28.1% tree cover, 2 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Langley need?
Langley needs roughly 5,963 more trees to close a 2-point shortfall against its 30% tree-cover target — about 131.2 t of extra CO₂ absorbed per year once grown.
How are Langley's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Langley, 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 Langley; the tree count is an estimate derived from that cover.
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