City report · England, United Kingdom
Crawley Air quality today
Air quality in Crawley currently reads AQI 87 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 87
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 28.4
- tree cover
- 32.9%
- trees in this area
- 103K
- more trees needed
- 0
Measured across a 1.2 mi (2 km) radius around Town Centre, Crawley, UK (4.9 sq mi), from a satellite image of Aug 28, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Crawley · AQI 87 (Moderate)
Crawley's tree count comes to 103,255 trees across 4.8 sq mi (12.56 km²) of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Crawley today: AQI 87, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 16:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Bolney, 8.0 mi (12.9 km) away · median of 3 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
28.4
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirGradient, PrivateBillingshurst, Nabu Casa UK
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Crawley's daily AQI at 71 on average, from 43 on Nov 4 to an hourly peak of 94 on Nov 7.
This is the US EPA AQI. How it differs from the UK's Daily Air Quality Index
Where Crawley stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Crawley: Healthy tree cover
32.9% tree cover against a 30% healthy-neighborhood target, across 4.8 sq mi (12.56 km²) of land.
Trees in this area
103,255
Target trees
103,255
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Crawley lost?
Since 2001, the area within 10 km of Crawley has lost about 285 hectares of forest (about 400 football pitches): 2.7% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 28 hectares (9.7%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from July 2017 of a 5 × 5 km area about 5 km southeast of the city center.
- Forest lost since 2001
- 285 haabout 400 football pitches
- Share of its forest
- 2.7%of what there was in 2000
- Cleared for good
- 28 hadeforestation: turned into farms, mines or towns
The worst year was 2023, when about 48 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 | 2 ha | 3 ha | 5 ha |
| 2002 | under 1 ha | under 1 ha | 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 3 ha | 25 ha | 28 ha |
| 2007 | under 1 ha | 7 ha | 7 ha |
| 2008 | 2 ha | 29 ha | 31 ha |
| 2009 | under 1 ha | 2 ha | 2 ha |
| 2010 | 2 ha | 4 ha | 6 ha |
| 2011 | under 1 ha | 8 ha | 9 ha |
| 2012 | under 1 ha | 2 ha | 2 ha |
| 2013 | under 1 ha | 17 ha | 17 ha |
| 2014 | under 1 ha | 29 ha | 29 ha |
| 2015 | under 1 ha | 7 ha | 7 ha |
| 2016 | under 1 ha | 4 ha | 4 ha |
| 2017 | under 1 ha | 6 ha | 6 ha |
| 2018 | 12 ha | 7 ha | 19 ha |
| 2019 | 1 ha | under 1 ha | 2 ha |
| 2020 | under 1 ha | 1 ha | 1 ha |
| 2021 | under 1 ha | 10 ha | 10 ha |
| 2022 | 2 ha | 7 ha | 8 ha |
| 2023 | under 1 ha | 48 ha | 48 ha |
| 2024 | under 1 ha | 35 ha | 35 ha |
| 2025 | under 1 ha | 7 ha | 7 ha |
What is causing deforestation around Crawley?
- Loggingcan grow back84% · 240 ha
- Towns and roadscleared for good8.7% · 25 ha
- Farms, pasture and plantationscleared for good1.1% · 3 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
- 12,700 ha
- Forest in 2020
- 13,100 ha
- Overall change
- +420 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Crawley grew from about 12,700 hectares to 13,100 hectares, a net gain of about 420 hectares (+3.3%). New forest grew on about 585 hectares, while 164 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 Crawley
Same 2 km radius, same index — so they compare directly.
- Sutton26.4 km
United Kingdom
- Tree cover
- 45%
- Air quality
- 71
- Brighton31.8 km
United Kingdom
- Tree cover
- 20%
- Air quality
- 99
- Woking34.8 km
United Kingdom
- Tree cover
- 54%
- Air quality
- 100
- Worthing35.5 km
United Kingdom
- Tree cover
- 13%
- Air quality
- 66
- Bexley43.2 km
United Kingdom
- Tree cover
- 40%
- Air quality
- 56
- London44.0 km
United Kingdom
- Tree cover
- 18%
- Air quality
- 56
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Frequently asked
Questions about Crawley
What is the air quality (AQI) in Crawley right now?
The latest reading for Crawley shows an AQI of 87 (Moderate), measured Nov 11, 16:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Bolney, 8.0 mi (12.9 km) away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Crawley today?
At AQI 87 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Crawley been like this week?
Over the last 7 days, the CAMS air-quality model put Crawley's daily AQI at 71 on average, from 43 on Nov 4 to an hourly peak of 94 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Crawley's AQI the same as the UK's Daily Air Quality Index?
No. Airleaf shows the US EPA Air Quality Index (AQI), the scale used by IQAir and most air-quality apps. The UK's Daily Air Quality Index (DAQI), published by Defra, runs from 1 to 10: 1–3 low, 4–6 moderate, 7–9 high and 10 very high. It is a different scale altogether, so a US AQI figure can't be read on it directly; both, though, are built from the same main pollutants, with fine particles (PM2.5) usually the one that decides the reading.
How much forest has the area around Crawley lost since 2001?
Since 2001, the area within 10 km of Crawley has lost about 285 hectares of forest (about 400 football pitches): 2.7% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 28 hectares (9.7%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Crawley grew from about 12,700 hectares to 13,100 hectares, a net gain of about 420 hectares (+3.3%). New forest grew on about 585 hectares, while 164 hectares were lost.
What is the tree count in Crawley?
Crawley has an estimated 103,255 trees across the 4.8 sq mi (12.56 km²) of land measured — 32.9% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Crawley need?
Crawley has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Crawley's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Town Centre, 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 1.2 mi (2 km) radius around Town Centre; the tree count is an estimate derived from that cover.
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