City report · England, United Kingdom
Bristol Air quality today
Air quality in Bristol currently reads AQI 17 (Good): Air quality is satisfactory for everyone.
AQI 17
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 3.1
- tree cover
- 26.3%
- trees in this area
- 80.6K
- more trees needed
- 11.3K
Measured across a 1.2 mi (2 km) radius around Bristol, UK (4.9 sq mi), from a satellite image of Sep 5, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Bristol · AQI 17 (Good)
Bristol's tree count comes to 80,558 trees across 4.7 sq mi (12.26 km²) of land, 4 points below the 30% tree-cover level considered healthy for this area, so roughly 11,333 more trees would close the gap.
Air quality detail
Air quality in Bristol today: AQI 17, Good
Main pollutant: PM2.5 · Observed Nov 11, 16:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Bristol St Paul's, United Kingdom, 0.7 mi (1.2 km) away
Health signal
Air quality is satisfactory for everyone.
PM2.5
3.1
PM10
9.7
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, UK-AIR, air quality information resource - Defra, UK
- 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 Bristol's daily AQI at 65 on average, from 35 on Nov 4 to an hourly peak of 87 on Nov 7.
This is the US EPA AQI. How it differs from the UK's Daily Air Quality Index
Where Bristol stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Bristol: Below target
26.3% tree cover against a 30% healthy-neighborhood target, across 4.7 sq mi (12.26 km²) of land.
Trees in this area
80,558
Target trees
91,891
More trees needed
11,333
CO₂ if planted / yr
249.3 t
Deforestation · 2001–2025
How much forest has Bristol lost?
Since 2001, the area within 10 km of Bristol has lost about 24 hectares of forest (about 33 football pitches): under 1% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (29%). About 11 hectares (44%) 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
- 24 haabout 33 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- 11 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 8 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 | 5 ha | 3 ha | 8 ha |
| 2002 | 2 ha | 2 ha | 4 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 | 2 ha | 2 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | 1 ha | under 1 ha | 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | 1 ha |
| 2017 | under 1 ha | 1 ha | 2 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 | 2 ha | 2 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 Bristol?
- Farms, pasture and plantationscleared for good29% · 7 ha
- Loggingcan grow back25% · 6 ha
- Towns and roadscleared for good15% · 4 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
- 6,060 ha
- Forest in 2020
- 6,670 ha
- Overall change
- +603 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Bristol grew from about 6,060 hectares to 6,670 hectares, a net gain of about 603 hectares (+9.9%). New forest grew on about 653 hectares, while 49 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 Bristol
Same 2 km radius, same index — so they compare directly.
- Bath18.6 km
United Kingdom
- Tree cover
- 49%
- Air quality
- 17
- Newport31.5 km
United Kingdom
- Tree cover
- 23%
- Air quality
- 60
- Cardiff40.5 km
United Kingdom
- Tree cover
- 17%
- Air quality
- 46
- Gloucester51.7 km
United Kingdom
- Tree cover
- 24%
- Air quality
- 69
- Swindon57.6 km
United Kingdom
- Tree cover
- 24%
- Air quality
- 19
- Cheltenham61.0 km
United Kingdom
- Tree cover
- 27%
- Air quality
- 70
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Frequently asked
Questions about Bristol
What is the air quality (AQI) in Bristol right now?
The latest reading for Bristol shows an AQI of 17 (Good), measured Nov 11, 16:00 local time by the Bristol St Paul's, United Kingdom ground monitoring station, 0.7 mi (1.2 km) away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Bristol 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 Bristol been like this week?
Over the last 7 days, the CAMS air-quality model put Bristol's daily AQI at 65 on average, from 35 on Nov 4 to an hourly peak of 87 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Bristol'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 Bristol lost since 2001?
Since 2001, the area within 10 km of Bristol has lost about 24 hectares of forest (about 33 football pitches): under 1% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (29%). About 11 hectares (44%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Bristol grew from about 6,060 hectares to 6,670 hectares, a net gain of about 603 hectares (+9.9%). New forest grew on about 653 hectares, while 49 hectares were lost.
What is the tree count in Bristol?
Bristol has an estimated 80,558 trees across the 4.7 sq mi (12.26 km²) of land measured — 26.3% tree cover, 4 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Bristol need?
Bristol needs roughly 11,333 more trees to close a 4-point shortfall against its 30% tree-cover target — about 249.3 t of extra CO₂ absorbed per year once grown.
How are Bristol's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Bristol, 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 Bristol; the tree count is an estimate derived from that cover.
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