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Air quality now: AQI54Moderate, Norwich

City report · England, United Kingdom

Norwich Air quality today

Air quality in Norwich currently reads AQI 54 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.

AQI 54

Air quality right now

Moderate

Main pollutant: PM2.5
PM2.5, fine particles (µg/m³)
10.9
tree cover
34.9%
trees in this area
110K
more trees needed
0

Measured across a 1.2 mi (2 km) radius around Norwich, UK (4.9 sq mi), from a satellite image of Aug 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.

Norwich · AQI 54 (Moderate)

Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Aug 25, 2026

Norwich's tree count comes to 109,532 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 Norwich today: AQI 54, Moderate

Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.

Ground station · Denton, Norfolk, 12.8 mi (20.6 km) away

Health signal

Unusually sensitive people should consider limiting long outdoor exertion.

PM2.5

10.9

PM10

—

NO₂

—

O₃

—

SO₂

—

CO

—

Data: OpenAQ · AirGradient, Shimm

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 Norwich's daily AQI at 63 on average, from 26 on Nov 4 to an hourly peak of 88 on Nov 8.

Last 7 days · model estimateavg 63 · peak 88
Nov 4: AQI 26 (peak 47)Nov 5: AQI 36 (peak 54)Nov 6: AQI 67 (peak 82)Nov 7: AQI 78 (peak 86)Nov 8: AQI 79 (peak 88)Nov 9: AQI 78 (peak 83)Nov 10: AQI 78 (peak 80)
Nov 4Nov 10

This is the US EPA AQI. How it differs from the UK's Daily Air Quality Index

Where Norwich stands: the most polluted cities in the world right now · the cleanest

Tree cover detail

Tree cover in Norwich: Healthy tree cover

34.9% tree cover against a 30% healthy-neighborhood target, across 4.8 sq mi (12.56 km²) of land.

Target reached

Trees in this area

109,532

Target trees

109,532

More trees needed

0

CO₂ if planted / yr

0 kg

Deforestation · 2001–2025

How much forest has Norwich lost?

Since 2001, the area within 10 km of Norwich has lost about 83 hectares of forest (about 120 football pitches): 2.1% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 21 hectares (26%) was deforestation: forest cleared for good for farms, mines or towns.

Satellite image of the area around Norwich, August 2017

2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.

Forest lost since 2001
83 haabout 120 football pitches
Share of its forest
2.1%of what there was in 2000
Cleared for good
21 hadeforestation: turned into farms, mines or towns

The worst year was 2008, when about 14 hectares of forest were lost.

Forest lost each year around Norwich, 2001–2025

Hectares of forest lost each year

Forest lost each year around Norwich, 2001–2025. Use the left and right arrow keys to read each year.13.8

Show the figures as a table
Forest lost each year around Norwich, 2001–2025
YearCleared for goodCan grow backTotal
2001under 1 haunder 1 ha1 ha
20022 ha4 ha6 ha
2003under 1 haunder 1 haunder 1 ha
2004under 1 haunder 1 haunder 1 ha
2005under 1 ha2 ha2 ha
20063 ha3 ha5 ha
2007under 1 ha2 ha3 ha
20084 ha10 ha14 ha
20091 ha2 ha3 ha
2010under 1 haunder 1 ha1 ha
20111 ha7 ha8 ha
2012under 1 haunder 1 ha1 ha
2013under 1 haunder 1 haunder 1 ha
2014under 1 haunder 1 haunder 1 ha
2015under 1 haunder 1 haunder 1 ha
20162 haunder 1 ha2 ha
20173 haunder 1 ha4 ha
2018under 1 ha8 ha8 ha
20192 ha8 ha10 ha
2020under 1 ha6 ha7 ha
2021under 1 ha2 ha2 ha
2022under 1 haunder 1 haunder 1 ha
2023under 1 haunder 1 haunder 1 ha
2024under 1 ha4 ha4 ha
2025under 1 haunder 1 haunder 1 ha

What is causing deforestation around Norwich?

  • Loggingcan grow back56% · 46 ha
  • Towns and roadscleared for good24% · 20 ha
  • Farms, pasture and plantationscleared for good1.3% · 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
3,130 ha
Forest in 2020
3,750 ha
Overall change
+623 hamore forest than in 2000

Comparing satellite maps from 2000 and 2020, the forest around Norwich grew from about 3,130 hectares to 3,750 hectares, a net gain of about 623 hectares (+20%). New forest grew on about 693 hectares, while 71 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 Norwich

Same 2 km radius, same index — so they compare directly.

  • Ipswich

    United Kingdom

    64.0 km
    Tree cover
    31%
    Air quality
    61
  • Colchester

    United Kingdom

    86.4 km
    Tree cover
    29%
    Air quality
    78
  • Cambridge

    United Kingdom

    93.2 km
    Tree cover
    30%
    Air quality
    39
  • Peterborough

    United Kingdom

    104.6 km
    Tree cover
    24%
    Air quality
    26
  • Chelmsford

    United Kingdom

    114.1 km
    Tree cover
    24%
    Air quality
    55
  • Southend-on-Sea

    United Kingdom

    127.6 km
    Tree cover
    16%
    Air quality
    55

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Norwich air quality (AQI) and tree cover — measured by Airleaf
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Frequently asked

Questions about Norwich

What is the air quality (AQI) in Norwich right now?

The latest reading for Norwich shows an AQI of 54 (Moderate), measured Nov 11, 17:00 local time by the Denton, Norfolk ground monitoring station, 12.8 mi (20.6 km) away, via OpenAQ. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.

Is it safe to exercise outside in Norwich today?

At AQI 54 (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 Norwich been like this week?

Over the last 7 days, the CAMS air-quality model put Norwich's daily AQI at 63 on average, from 26 on Nov 4 to an hourly peak of 88 on Nov 8. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.

Is Norwich'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 Norwich lost since 2001?

Since 2001, the area within 10 km of Norwich has lost about 83 hectares of forest (about 120 football pitches): 2.1% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 21 hectares (26%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Norwich grew from about 3,130 hectares to 3,750 hectares, a net gain of about 623 hectares (+20%). New forest grew on about 693 hectares, while 71 hectares were lost.

What is the tree count in Norwich?

Norwich has an estimated 109,532 trees across the 4.8 sq mi (12.56 km²) of land measured — 34.9% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does Norwich need?

Norwich has already reached its tree-cover target, so no additional trees are needed to close the gap.

How are Norwich's air quality and tree cover measured?

Air quality is measured by ground monitoring stations near Norwich, 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 Norwich; the tree count is an estimate derived from that cover.

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