Worst air pollution Hampstead Heath - London, today and tomorrow
Today (16 July): Air quality in Hampstead Heath is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 34.0/100).
Tomorrow (17 July 2026): Air quality in Hampstead Heath is medium. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 43.6/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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The nearby A303 corridor contributes steady vehicle emissions that affect roadside readings. Like much of London, City of, Hampstead Heath's air quality is shaped less by industry these days and more by everyday road traffic. The area's changeable Atlantic weather offer a degree of natural ventilation, keeping pollution broadly in line with comparable UK towns.
Today - 16 July | Pollution peaks at 15:00
AQI:
Fair
34.0/100
PM2.5 (fine particles):
Good
7.3/100
PM10 (coarse particles):
Good
2.5/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
6.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Medium
43.6/100
PM2.5 (fine particles):
Good
10.0/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Medium
43.6/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
9.3/100
Other Landmarks in London
Frequently Asked Questions
Is air quality bad in Hampstead Heath right now?
On 16 July 2026, overall air quality in Hampstead Heath is fair. AQI is the main air quality indicator at 34.0/100. Pollution peaks around 3:00 PM (O3: 34.0/100).
Will air quality be worse tomorrow in Hampstead Heath?
On 17 July 2026, air quality conditions in Hampstead Heath will be better than today, with AQI forecast at medium at 43.6/100. Pollution peaks around 4:00 PM (O3: 43.6/100).
When is air pollution at its worst in Hampstead Heath?
You can roughly predict Hampstead Heath's air quality just by knowing the time of year. Summer's more of a mixed bag: ozone can spike in strong sun, but overall dispersion tends to be better than the depths of winter. Come winter, NO₂ and PM2.5 usually creep up, as heating and calmer air let A303 traffic emissions linger rather than disperse. Most of spring and autumn stays fairly steady, right in the middle of those two extremes.
Are air quality levels in Hampstead Heath 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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (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