Know the air you breathe, right now.
Real-time AQI, six key pollutants, health guidance and a 5-day forecast for any place on Earth - refreshed automatically while you're on the page.
London
England, United Kingdom
- EU AQI
- PM2.5 vs WHO
- Main pollutant
- UV index
Fetching the latest model run…
Live pollution map
See the air, everywhere.
Every bubble is a live city reading. The coloured haze is the estimated AQI for the area in view.
Live pollution map
What's in the air
Six pollutants. One number.
The AQI is set by whichever pollutant is worst right now. Here's each one against the World Health Organization's 2021 guideline - the level above which health risk measurably rises.
Showing data for London, United Kingdom
What it means for you
Health guidance, tuned to this hour.
Advice for the current AQI band, plus the cleanest window to get outside in the next 24 hours.
Showing data for London, United Kingdom
Hour by hour
Yesterday, today, and the days ahead.
The last 24 hours of readings, joined to the hourly forecast.
Showing data for London, United Kingdom
Plan ahead
The week ahead, at a glance.
Daily highs and lows, with every hour of the forecast mapped so patterns - morning rush, evening inversions - jump out.
Showing data for London, United Kingdom
Hourly AQI heatmap
- Good
- Moderate
- Sensitive
- Unhealthy
- Very Unhealthy
- Hazardous
Around the world
How does your air compare?
Live AQI across 18 major cities, updated every 10 minutes.
Showing data for Compared with London, United Kingdom
| City | AQI | PM2.5 µg/m³ |
|---|
Reading the number
The AQI scale, decoded.
This page uses the US EPA Air Quality Index - the most widely used AQI scale. It turns pollutant levels into one 0-500 number with six colour-coded bands.
0-50
Good
Air quality is satisfactory and poses little or no risk.
51-100
Moderate
Acceptable, though a few pollutants may affect unusually sensitive people.
101-150
Unhealthy for Sensitive Groups
Children, older adults and people with heart or lung disease may feel effects.
151-200
Unhealthy
Everyone may begin to feel effects; sensitive groups more seriously.
201-300
Very Unhealthy
Health alert - the risk of effects is increased for everyone.
301-500+
Hazardous
Health warning of emergency conditions - everyone is likely to be affected.
Worst pollutant wins
Each pollutant gets its own sub-index. The headline AQI is simply the highest of them - which is why one smoky hour can tip the whole number.
Non-linear on purpose
The first 50 points cover clean air; the last 200 cover emergencies. Moving from 50 to 100 matters far more for health than 400 to 450.
Model, not a single sensor
Readings come from the CAMS atmospheric model, which blends satellite and ground data across a grid. Expect small differences from a monitor on your street.
Same chimney, two crises
Cleaner air starts where the carbon does.
Fossil-fuel combustion drives most of both air pollution and CO₂. Myplan8® helps businesses measure and cut emissions at the source - and helps people track the footprint of everyday choices.
Air quality data by Open-Meteo.com