Worst air pollution Amersham, today and tomorrow
Today (16 July): Air quality in Amersham is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 34.0/100).
Tomorrow (17 July 2026): Air quality in Amersham is fair. 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 M25 corridor contributes steady vehicle emissions that affect roadside readings. Amersham's position in Buckinghamshire means air quality is mostly determined by local road traffic and the compact scale of the centre. Prevailing westerlies 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
10.6/100
PM10 (coarse particles):
Good
3.6/100
NO2 (nitrogen dioxide):
Fair
21.5/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
10.1/100
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
14.5/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Fair
28.2/100
O3 (ozone):
Medium
43.6/100
SO2 (sulfur dioxide):
Good
4.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
13.5/100
Pollen forecast in Amersham
View pollen forecastFrequently Asked Questions
Is air quality bad in Amersham right now?
On 16 July 2026, overall air quality in Amersham 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 Amersham?
On 17 July 2026, air quality conditions in Amersham will be similar to today, with NO2 forecast at fair at 28.2/100. Pollution peaks around 4:00 PM (O3: 43.6/100).
When is air pollution at its worst in Amersham?
The shoulder seasons generally bring the mildest readings of the year. Air quality in Amersham isn't the same all year round — it really shifts with the seasons. Winter mornings can be the trickiest, with cold, still conditions trapping M25 traffic fumes and smoke from home fires close to the ground. By summer, ozone tends to rise on bright days, while better ventilation generally keeps particulate and NO₂ levels lower than winter.
Are air quality levels in Amersham 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