City report · England, United Kingdom
Warrington Air quality today
Air quality in Warrington currently reads AQI 13 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 13
Good
- PM2.5, fine particles (µg/m³)
- 2.4
- tree cover
- 25.2%
- trees in this area
- 79.1K
- more trees needed
- 15.1K
Measured across a 1.2 mi (2 km) radius around Warrington, UK (4.9 sq mi), from a satellite image of Jul 12, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Warrington · AQI 13 (Good)
Warrington's tree count comes to 79,089 trees across 4.8 sq mi (12.56 km²) of land, 5 points below the 30% tree-cover level considered healthy for this area, so roughly 15,065 more trees would close the gap.
Air quality detail
Air quality in Warrington today: AQI 13, Good
Main pollutant: PM2.5 · Observed Nov 11, 15:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Golborne Dale Cottage, 4.9 mi (7.9 km) away
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.4
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirGradient, Dan Cunliffe
- 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 Warrington's daily AQI at 63 on average, from 33 on Nov 4 to an hourly peak of 93 on Nov 8.
This is the US EPA AQI. How it differs from the UK's Daily Air Quality Index
Where Warrington stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Warrington: Below target
25.2% tree cover against a 30% healthy-neighborhood target, across 4.8 sq mi (12.56 km²) of land.
Trees in this area
79,089
Target trees
94,154
More trees needed
15,065
CO₂ if planted / yr
331.4 t
Deforestation · 2001–2025
How much forest has Warrington lost?
Since 2001, the area within 10 km of Warrington has lost about 16 hectares of forest (about 22 football pitches): under 1% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (20%). About 6 hectares (37%) was deforestation: forest cleared for good for farms, mines or towns.
2018: satellite photo from June 2018 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 16 haabout 22 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- 6 hadeforestation: turned into farms, mines or towns
The worst year was 2005, when about 3 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 | under 1 ha | 1 ha | 2 ha |
| 2002 | under 1 ha | 2 ha | 2 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 1 ha | under 1 ha | 1 ha |
| 2005 | 2 ha | under 1 ha | 3 ha |
| 2006 | under 1 ha | 1 ha | 2 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | 1 ha |
| 2010 | under 1 ha | 2 ha | 2 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | 1 ha | 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Warrington?
- Farms, pasture and plantationscleared for good20% · 3 ha
- Towns and roadscleared for good17% · 3 ha
- Loggingcan grow back3.8% · under 1 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
- 1,180 ha
- Forest in 2020
- 1,730 ha
- Overall change
- +553 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Warrington grew from about 1,180 hectares to 1,730 hectares, a net gain of about 553 hectares (+47%). New forest grew on about 568 hectares, while 14 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 Warrington
Same 2 km radius, same index — so they compare directly.
- Wigan17.2 km
United Kingdom
- Tree cover
- 31%
- Air quality
- 13
- Bolton23.3 km
United Kingdom
- Tree cover
- 28%
- Air quality
- 38
- Manchester24.4 km
United Kingdom
- Tree cover
- 13%
- Air quality
- 53
- Liverpool26.4 km
United Kingdom
- Tree cover
- 13%
- Air quality
- 33
- Stockport28.1 km
United Kingdom
- Tree cover
- 33%
- Air quality
- 14
- Oldham34.7 km
United Kingdom
- Tree cover
- 23%
- Air quality
- 53
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Frequently asked
Questions about Warrington
What is the air quality (AQI) in Warrington right now?
The latest reading for Warrington shows an AQI of 13 (Good), measured Nov 11, 15:00 local time by the Golborne Dale Cottage ground monitoring station, 4.9 mi (7.9 km) away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Warrington today?
At AQI 13 (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 Warrington been like this week?
Over the last 7 days, the CAMS air-quality model put Warrington's daily AQI at 63 on average, from 33 on Nov 4 to an hourly peak of 93 on Nov 8. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Warrington'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 Warrington lost since 2001?
Since 2001, the area within 10 km of Warrington has lost about 16 hectares of forest (about 22 football pitches): under 1% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (20%). About 6 hectares (37%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Warrington grew from about 1,180 hectares to 1,730 hectares, a net gain of about 553 hectares (+47%). New forest grew on about 568 hectares, while 14 hectares were lost.
What is the tree count in Warrington?
Warrington has an estimated 79,089 trees across the 4.8 sq mi (12.56 km²) of land measured — 25.2% tree cover, 5 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Warrington need?
Warrington needs roughly 15,065 more trees to close a 5-point shortfall against its 30% tree-cover target — about 331.4 t of extra CO₂ absorbed per year once grown.
How are Warrington's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Warrington, 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 Warrington; the tree count is an estimate derived from that cover.
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