City report · England, United Kingdom
Worcester Air quality today
Air quality in Worcester currently reads AQI 21 (Good): Air quality is satisfactory for everyone.
AQI 21
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 3.8
- tree cover
- 27.4%
- trees in this area
- 85.9K
- more trees needed
- 8.2K
Measured across a 1.2 mi (2 km) radius around Worcester, UK (4.9 sq mi), from a satellite image of Aug 23, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Worcester · AQI 21 (Good)
Worcester's tree count comes to 85,907 trees across 4.8 sq mi (12.54 km²) of land, 3 points below the 30% tree-cover level considered healthy for this area, so roughly 8,152 more trees would close the gap.
Air quality detail
Air quality in Worcester today: AQI 21, Good
Main pollutant: PM2.5 · Observed Nov 11, 16:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Crown East, 2.5 mi (4 km) away
Health signal
Air quality is satisfactory for everyone.
PM2.5
3.8
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirGradient, Crown East
- 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 Worcester's daily AQI at 65 on average, from 31 on Nov 4 to an hourly peak of 89 on Nov 7.
This is the US EPA AQI. How it differs from the UK's Daily Air Quality Index
Where Worcester stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Worcester: Below target
27.4% tree cover against a 30% healthy-neighborhood target, across 4.8 sq mi (12.54 km²) of land.
Trees in this area
85,907
Target trees
94,059
More trees needed
8,152
CO₂ if planted / yr
179.3 t
Deforestation · 2001–2025
How much forest has Worcester lost?
Since 2001, the area within 10 km of Worcester has lost about 27 hectares of forest (about 38 football pitches): 1.3% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (35%). About 9 hectares (34%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 27 haabout 38 football pitches
- Share of its forest
- 1.3%of what there was in 2000
- Cleared for good
- 9 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 12 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 | 8 ha | 4 ha | 12 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 | 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 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | 1 ha | 2 ha |
| 2011 | under 1 ha | 2 ha | 2 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 | 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 | 6 ha | 6 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | 1 ha | 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 Worcester?
- Farms, pasture and plantationscleared for good35% · 9 ha
- Loggingcan grow back29% · 8 ha
- Unknown causescause unknown37% · 10 ha
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
- 1,370 ha
- Forest in 2020
- 1,610 ha
- Overall change
- +238 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Worcester grew from about 1,370 hectares to 1,610 hectares, a net gain of about 238 hectares (+17%). New forest grew on about 265 hectares, while 26 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 Worcester
Same 2 km radius, same index — so they compare directly.
- Cheltenham33.6 km
United Kingdom
- Tree cover
- 27%
- Air quality
- 70
- Dudley35.8 km
United Kingdom
- Tree cover
- 35%
- Air quality
- 56
- Gloucester36.0 km
United Kingdom
- Tree cover
- 24%
- Air quality
- 65
- Solihull39.0 km
United Kingdom
- Tree cover
- 49%
- Air quality
- 67
- Birmingham39.1 km
United Kingdom
- Tree cover
- 16%
- Air quality
- 56
- Wolverhampton44.5 km
United Kingdom
- Tree cover
- 25%
- Air quality
- 56
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Frequently asked
Questions about Worcester
What is the air quality (AQI) in Worcester right now?
The latest reading for Worcester shows an AQI of 21 (Good), measured Nov 11, 16:00 local time by the Crown East ground monitoring station, 2.5 mi (4 km) away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Worcester today?
At AQI 21 (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 Worcester been like this week?
Over the last 7 days, the CAMS air-quality model put Worcester's daily AQI at 65 on average, from 31 on Nov 4 to an hourly peak of 89 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Worcester'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 Worcester lost since 2001?
Since 2001, the area within 10 km of Worcester has lost about 27 hectares of forest (about 38 football pitches): 1.3% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (35%). About 9 hectares (34%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Worcester grew from about 1,370 hectares to 1,610 hectares, a net gain of about 238 hectares (+17%). New forest grew on about 265 hectares, while 26 hectares were lost.
What is the tree count in Worcester?
Worcester has an estimated 85,907 trees across the 4.8 sq mi (12.54 km²) of land measured — 27.4% tree cover, 3 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Worcester need?
Worcester needs roughly 8,152 more trees to close a 3-point shortfall against its 30% tree-cover target — about 179.3 t of extra CO₂ absorbed per year once grown.
How are Worcester's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Worcester, 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 Worcester; the tree count is an estimate derived from that cover.
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