What's the air quality in Windsor and Maidenhead? NO₂ 13.1 µg/m³
In 2025 the average resident of Windsor and Maidenhead lived with background NO₂ of 13.1 µg/m³, Very High for England and Wales and 1.3 times the WHO guideline of 10. PM2.5 was 9.0 µg/m³, Very High for England and Wales and 1.8 times the WHO guideline of 5. The typical area in England and Wales has NO₂ of 7.2 and PM2.5 of 7.4 µg/m³.
- PM2.5
- 9.0 µg/m³
- NO₂ for England and Wales
- Very High
- Figures for
- 2025 annual average
Modelled background levels averaged over where residents live (Census 2021), not roadside levels. Contains public sector information licensed under the Open Government Licence v3.0. Source: Defra modelled background pollution, 2025. How we calculate this
All house prices in Windsor and MaidenheadIs the air quality good in Windsor and Maidenhead?
Background NO₂ in Windsor and Maidenhead is 13.1 µg/m³, 1.3 times the WHO guideline of 10, and higher than the typical area (7.2). That puts it in the Very High band. Background PM2.5 in Windsor and Maidenhead is 9.0 µg/m³, 1.8 times the WHO guideline of 5, and higher than the typical area (7.4). That puts it in the Very High band. Most of England and Wales is above the WHO guideline for PM2.5, so the bands compare places with each other rather than giving a pass or fail.
Nitrogen dioxide (NO₂): 13.1 µg/m³
NO₂ level is Very High, on a scale from Very Low to Very High.
Very High means the highest fifth of areas in England and Wales for NO₂.
| Very Low | up to 4.7 |
|---|---|
| Low | 4.7 to 6.5 |
| Typical | 6.5 to 7.7 |
| High | 7.7 to 9.2 |
| Very High | over 9.2 |
WHO guideline: 10 µg/m³ (in the Very High band). UK legal limit: 40 µg/m³.
Fine particles (PM2.5): 9.0 µg/m³
PM2.5 level is Very High, on a scale from Very Low to Very High.
Very High means the highest fifth of areas in England and Wales for PM2.5.
| Very Low | up to 6.0 |
|---|---|
| Low | 6.0 to 7.2 |
| Typical | 7.2 to 7.7 |
| High | 7.7 to 8.2 |
| Very High | over 8.2 |
WHO guideline: 5 µg/m³ (in the Very Low band). UK legal limit: 20 µg/m³, with a target of 10 µg/m³ in England by 2040.
The bands split every area we cover into fifths by its level, from Very Low to Very High. The map uses the same colours.
Which part of Windsor and Maidenhead has the cleanest air?
Sunninghill and Ascot has the lowest background NO₂ of the 17 areas of Windsor and Maidenhead, at 10.6 µg/m³. Horton has the highest, at 16.2 µg/m³. Average house prices are shown alongside, so you can weigh air quality against cost.
| Area | NO₂ | PM2.5 | NO₂ band | Average price |
|---|---|---|---|---|
| Sunninghill and AscotVery High | 10.6 | 8.6 | Very High | £900,369 |
| SunningdaleVery High | 10.7 | 8.7 | Very High | £852,728 |
| HurleyVery High | 10.8 | 8.6 | Very High | £1,099,444 |
| Waltham St. LawrenceVery High | 11.0 | 8.7 | Very High | £1,181,731 |
| White WalthamVery High | 11.8 | 9.0 | Very High | £926,142 |
| ShottesbrookeVery High | 11.9 | 8.8 | Very High | — |
| BishamVery High | 12.4 | 8.9 | Very High | £2,156,428 |
| CookhamVery High | 12.5 | 9.0 | Very High | £859,896 |
| WindsorVery High | 13.0 | 8.9 | Very High | £545,336 |
| MaidenheadVery High | 13.3 | 9.2 | Very High | £509,902 |
| Cox GreenVery High | 13.4 | 9.2 | Very High | £542,626 |
| Old WindsorVery High | 13.6 | 8.9 | Very High | £542,180 |
| BrayVery High | 13.9 | 9.1 | Very High | £674,246 |
| EtonVery High | 14.8 | 9.1 | Very High | £484,076 |
| WraysburyVery High | 15.2 | 9.0 | Very High | £706,100 |
| DatchetVery High | 16.1 | 9.2 | Very High | £511,739 |
| HortonVery High | 16.2 | 9.1 | Very High | £562,000 |
Levels in µg/m³, 2025 annual average.
How does air quality in Windsor and Maidenhead compare with nearby areas?
Background NO₂ in Windsor and Maidenhead compared with the 5 nearest other areas in Berkshire.
Windsor and Maidenhead vs Slough
- Windsor and Maidenhead
- NO₂ 13.1 µg/m³
- Slough
- NO₂ 15.9 µg/m³
Open comparison
Windsor and Maidenhead vs Bracknell Forest
- Windsor and Maidenhead
- NO₂ 13.1 µg/m³
- Bracknell Forest
- NO₂ 10.4 µg/m³
Open comparison
Windsor and Maidenhead vs Wokingham
- Windsor and Maidenhead
- NO₂ 13.1 µg/m³
- Wokingham
- NO₂ 10.9 µg/m³
Open comparison
Windsor and Maidenhead vs Reading
- Windsor and Maidenhead
- NO₂ 13.1 µg/m³
- Reading
- NO₂ 11.4 µg/m³
Open comparison
Windsor and Maidenhead vs West Berkshire
- Windsor and Maidenhead
- NO₂ 13.1 µg/m³
- West Berkshire
- NO₂ 8.6 µg/m³
Open comparison
Does this include busy roads?
No. These are background levels: yearly averages over 1 km squares, away from the immediate influence of roads. Right beside a busy road in Windsor and Maidenhead, NO₂ can be much higher. Councils publish roadside monitoring in their annual air quality reports.
What else do people ask about Windsor and Maidenhead?
More quick answers on house prices, sales, areas, green space, crime, air quality and listed buildings in Windsor and Maidenhead.
- What is the average house price in Windsor and Maidenhead?
- When did average house prices in Windsor and Maidenhead reach their peak?
- How many properties are being sold in Windsor and Maidenhead?
- What type of properties are sold in Windsor and Maidenhead?
- What price range do most homes sell for in Windsor and Maidenhead?
- What is the most expensive (and cheapest) area of Windsor and Maidenhead?
- How many parks and green spaces are in Windsor and Maidenhead?
- What is the crime rate in Windsor and Maidenhead?
- How many listed buildings are in Windsor and Maidenhead?
- How do Windsor and Maidenhead house prices compare with another area?
Where does this data come from?
Price information is from HM Land Registry, location boundaries are from OpenStreetMap, and households and population are from Nomis Census 2021 postcode estimates (21 March 2021). Parks and green space are from OS Open Greenspace. Contains OS data © Crown copyright and database right 2026. Crime is from police.uk street-level data. Contains public sector information licensed under the Open Government Licence v3.0. Source: police.uk. Listed buildings and scheduled monuments are from Historic England and Cadw, and conservation areas from planning.data.gov.uk. © Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. Source: planning.data.gov.uk, Open Government Licence v3.0. Air quality is from Defra modelled background pollution maps. Contains public sector information licensed under the Open Government Licence v3.0. Source: Defra modelled background pollution, 2025.
Last updated 11 November 2026 at 01:30 with the latest Land Registry data (September 2026). The Windsor and Maidenhead dataset covers 7,109 postcodes.
Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
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