Open windows at the right time
- Avoid road-facing windows at rush hour (about 7–10am and 4–7pm).
- Air rooms for a few minutes every day — don't seal your home.
- Run kitchen and bathroom fans.
London air quality today
Live air pollution levels across London from official monitoring stations, updated hourly. Search your postcode to see the air quality index near you.
Checking London's air…
Tap any dot on the map, or search above, to see that spot's air.
123Good456Moderate789Poor10Very poor
Each dot shows its station's score out of 10. Deeper colour means worse air, even within the same band.
The two that matter most, in plain English
Tap a card to read the short version — no science degree needed.
What should I do today?
Everyone
Enjoy normal outdoor activity.
Asthma, lung or heart conditions
Enjoy normal outdoor activity.
Children & older people
Play outside as normal.
Runners & cyclists
Great conditions for a run or ride.
Protect yourself
What you can do
Three simple ways to breathe cleaner air at home. Start with the free ones.
Choose an air purifier that works
- Pick one with a true HEPA filter.
- Match its CADR to your room size.
- HEPA won't remove traffic gas — that needs thick carbon.
Stop pollution starting indoors
- Turn the cooker fan on before you start cooking.
- No smoking, fewer candles and incense indoors.
- Filter the air and also let fresh air in.
A green day doesn't mean healthy air
This site shows today's air, which is often low thanks to London's weather. But the long-term picture is different: the yearly average for NO₂ and PM2.5 still exceeds World Health Organization guidelines in every London borough, and breathing that air over years is what harms health. Inner London — the City, Westminster, Kensington & Chelsea and Islington — is the worst affected.
See the long-term data from Urban Health →Want to see how pollution varies across London over the years? The Mayor of London's air quality map shows modelled NO₂ and PM2.5 levels for 2022, 2025 and 2030 — a longer-term picture, not today's live readings.