Highest air pollution Westminster - London, today and tomorrow
Today (25 June): Air quality in Westminster is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 64.8/100).
Tomorrow (26 June 2026): Air quality in Westminster is poor. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 63.5/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Air quality in Westminster is influenced by dense urban development, heavy traffic, and its location along the River Thames in central London. Pollution levels reflect a mix of emissions from major roads and activity around key government and tourist areas.
Today - 25 June | Pollution peaks at 15:00
AQI:
Poor
64.8/100
PM2.5 (fine particles):
Good
10.5/100
PM10 (coarse particles):
Good
5.3/100
NO2 (nitrogen dioxide):
Good
15.1/100
O3 (ozone):
Poor
64.8/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.7/100
PM1 (ultrafine particles):
Good
8.6/100
Levels show the poorest local air quality during the day
Tomorrow - 26 June | Pollution peaks at 12:00
AQI:
Poor
63.5/100
PM2.5 (fine particles):
Good
10.1/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Fair
25.5/100
O3 (ozone):
Poor
63.5/100
SO2 (sulfur dioxide):
Good
3.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.4/100
PM1 (ultrafine particles):
Good
8.9/100
Other Landmarks in London
Frequently Asked Questions
Is air quality bad in Westminster right now?
On 25 June 2026, overall air quality in Westminster is poor. AQI is the main air quality indicator at 64.8/100. Pollution peaks around 3:00 PM (O3: 64.8/100).
Will air quality be worse tomorrow in Westminster?
On 26 June 2026, air quality conditions in Westminster will be similar to today, with AQI forecast at poor at 63.5/100. Pollution peaks around 12:00 PM (O3: 63.5/100).
When is air pollution at its highest in Westminster?
Air pollution in Westminster is often higher during peak traffic periods, when emissions build up along busy roads and in built-up areas where airflow is limited. Calm conditions can trap pollutants, while proximity to the River Thames can at times support dispersion.
Are air quality levels in Westminster based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Check air quality in other popular cities:
Data provided by Airmine — Last update: 25 June 2026 at 09:02 CET (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team