Worst air pollution Caterham, today and tomorrow
Today (16 July): Air quality in Caterham is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 35.5/100).
Tomorrow (17 July 2026): Air quality in Caterham is fair. AQI improves to medium; NO2 increases to fair; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 48.7/100). 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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Caterham's position in Surrey means air quality is mostly determined by local road traffic and the compact scale of the centre. Easterly winds tend to disperse pollutants reasonably well, keeping readings close to typical UK small-town levels. The M8 sees the heaviest traffic, and that shows up clearly in local roadside monitoring.
Today - 16 July | Pollution peaks at 14:00
AQI:
Fair
35.5/100
PM2.5 (fine particles):
Good
9.7/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Good
15.8/100
O3 (ozone):
Fair
35.5/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.3/100
PM1 (ultrafine particles):
Good
8.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Medium
48.7/100
PM2.5 (fine particles):
Good
15.4/100
PM10 (coarse particles):
Good
5.0/100
NO2 (nitrogen dioxide):
Fair
21.9/100
O3 (ozone):
Medium
48.7/100
SO2 (sulfur dioxide):
Good
3.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.7/100
PM1 (ultrafine particles):
Good
15.7/100
Pollen forecast in Caterham
View pollen forecastFrequently Asked Questions
Is air quality bad in Caterham right now?
On 16 July 2026, overall air quality in Caterham is fair. AQI is the main air quality indicator at 35.5/100. Pollution peaks around 2:00 PM (O3: 35.5/100).
Will air quality be worse tomorrow in Caterham?
On 17 July 2026, air quality conditions in Caterham will be similar to today, with NO2 forecast at fair at 21.9/100. Pollution peaks around 4:00 PM (O3: 48.7/100).
When is air pollution at its worst in Caterham?
Here's the thing about Caterham: air quality has a clear seasonal rhythm. In deep winter, a lack of wind lets M8 traffic fumes and woodsmoke settle instead of blowing through. Come summer, it's ozone rather than particulates that's the bigger concern, especially on still, sunny days. Spring and autumn tend to be the calmer, more moderate stretches by comparison.
Are air quality levels in Caterham 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