Air Quality in London
England — Greater London
8,982,000 inhabitants
59 of 60 cities
Standard deviation: ±14 points
Based on 600 measurements
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Air quality in London: what you need to know
London, the UK capital and one of the world's largest metropolises, faces significant air quality challenges. With over 9 million residents, road traffic, heating, and industrial activity generate high levels of NO2 and fine particles. The city has implemented the world's most ambitious Ultra Low Emission Zone (ULEZ), covering all of Greater London. Neighborhoods near the Royal Parks (Hyde Park, Regent's Park, Richmond Park) enjoy better air. The average score of 52/100 reflects the challenges of a dense megacity, but the ULEZ shows encouraging results with a notable decrease in central NO2 levels.
Main pollutants in London
Main pollutants: NO2, PM2.5, PM10
Traffic-related NO2 is London's most concerning pollutant. Fine particles PM2.5 come from traffic, heating, and external sources (continental transport). The ULEZ has significantly reduced central NO2 levels since 2019.
PM2.5 — Fine Particulate Matter
Particles smaller than 2.5 micrometers. From traffic and heating. Penetrate deep into the lungs.
Key pollutantPM10 — Coarse Particulate Matter
Particles smaller than 10 micrometers. From traffic, construction, and erosion. Irritating to airways.
Key pollutantNO2 — Nitrogen Dioxide
Gas mainly from diesel engine combustion. Direct indicator of road traffic. Respiratory irritant.
Key pollutantO3 — Ozone
Secondary pollutant formed by chemical reaction under sunlight. Peaks in summer. Causes respiratory irritation.
SO2 — Sulfur Dioxide
From combustion of sulfur-containing fossil fuels. Found near industrial and port areas.
CO — Carbon Monoxide
Odorless gas from incomplete combustion. Linked to road traffic and faulty heating systems.
Neighborhood comparison in London
Air quality varies significantly between neighborhoods. With a standard deviation of ±14 points, two addresses in London can show very different scores. Only an address-level report reveals the actual air quality.
Impact on real estate in London
In London, air quality directly impacts property prices. Properties near Royal Parks benefit from a significant premium. The ULEZ has reinforced the attractiveness of central neighborhoods for families concerned about air quality. An ImmoGrade report is an asset for agents operating in the London market.
Health tips related to air quality
Check the ImmoGrade for your address before buying or renting a property.
Sensitive individuals (children, elderly, asthma sufferers) should be particularly cautious in areas scoring below 50/100.
Choose homes away from major roads and near green spaces for better indoor air quality.
Ventilate your home early in the morning or late in the evening, when pollution levels are lowest.
National Ranking — Top 5
| # | City | Score |
|---|---|---|
| 1 | Brest | 82/100 |
| 2 | Lorient | 78/100 |
| 3 | La Rochelle | 77/100 |
| 4 | Bayonne | 76/100 |
| 5 | Ajaccio | 75/100 |
Frequently asked questions about air quality in London
Is London's ULEZ actually improving air quality?
Yes, since its expansion to all of Greater London, the ULEZ has reduced NO2 levels by 20-30% in the central zone. Outer neighborhoods are also beginning to benefit from this improvement.
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