What's the air quality in Longfield and New Barn? NO₂ 9.4 µg/m³
In 2025 the average resident of Longfield and New Barn lived with background NO₂ of 9.4 µg/m³, Very High for England and Wales and below the WHO guideline of 10. PM2.5 was 8.3 µg/m³, Very High for England and Wales and 1.7 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
- 8.3 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 Longfield and New BarnIs the air quality good in Longfield and New Barn?
Background NO₂ in Longfield and New Barn is 9.4 µg/m³, below 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 Longfield and New Barn is 8.3 µg/m³, 1.7 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): 9.4 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): 8.3 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.
How does air quality in Longfield and New Barn compare with nearby areas?
Background NO₂ in Longfield and New Barn compared with the 6 nearest other areas in Dartford.
Longfield and New Barn vs Southfleet
- Longfield and New Barn
- NO₂ 9.4 µg/m³
- Southfleet
- NO₂ 10.5 µg/m³
Open comparison
Longfield and New Barn vs Bean
- Longfield and New Barn
- NO₂ 9.4 µg/m³
- Bean
- NO₂ 14.9 µg/m³
Open comparison
Longfield and New Barn vs Darenth
- Longfield and New Barn
- NO₂ 9.4 µg/m³
- Darenth
- NO₂ 12.3 µg/m³
Open comparison
Longfield and New Barn vs Sutton-at-Hone and Hawley
- Longfield and New Barn
- NO₂ 9.4 µg/m³
- Sutton-at-Hone and Hawley
- NO₂ 12.3 µg/m³
Open comparison
Longfield and New Barn vs Swanscombe and Greenhithe
- Longfield and New Barn
- NO₂ 9.4 µg/m³
- Swanscombe and Greenhithe
- NO₂ 13.3 µg/m³
Open comparison
Longfield and New Barn vs Stone
- Longfield and New Barn
- NO₂ 9.4 µg/m³
- Stone
- NO₂ 14.1 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 Longfield and New Barn, NO₂ can be much higher. Councils publish roadside monitoring in their annual air quality reports.
What else do people ask about Longfield and New Barn?
More quick answers on house prices, sales, areas, green space, crime, air quality and listed buildings in Longfield and New Barn.
- What is the average house price in Longfield and New Barn?
- When did average house prices in Longfield and New Barn reach their peak?
- How many properties are being sold in Longfield and New Barn?
- What type of properties are sold in Longfield and New Barn?
- What price range do most homes sell for in Longfield and New Barn?
- What is the most expensive (and cheapest) area of Longfield and New Barn?
- How many parks and green spaces are in Longfield and New Barn?
- What is the crime rate in Longfield and New Barn?
- How many listed buildings are in Longfield and New Barn?
- How do Longfield and New Barn 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 01:36 with the latest Land Registry data (September 2026). The Longfield and New Barn dataset covers 221 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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