Worst air pollution Farnham, today and tomorrow
Today (16 July): Air quality in Farnham 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 Farnham 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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Commuter traffic feeding onto the A303 adds a further, consistent contribution to local readings. Farnham sits within Surrey, and its air quality profile is driven mainly by road traffic and the density of the centre. Thanks to easterly winds, pollution rarely lingers for long, which keeps average readings fairly unremarkable by UK standards.
Today - 16 July | Pollution peaks at 14:00
AQI:
Fair
35.5/100
PM2.5 (fine particles):
Good
10.1/100
PM10 (coarse particles):
Good
3.6/100
NO2 (nitrogen dioxide):
Good
18.6/100
O3 (ozone):
Fair
35.5/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.3/100
PM1 (ultrafine particles):
Good
9.1/100
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
16.1/100
PM10 (coarse particles):
Good
5.2/100
NO2 (nitrogen dioxide):
Fair
24.8/100
O3 (ozone):
Medium
48.7/100
SO2 (sulfur dioxide):
Good
4.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.7/100
PM1 (ultrafine particles):
Good
16.4/100
Pollen forecast in Farnham
View pollen forecastFrequently Asked Questions
Is air quality bad in Farnham right now?
On 16 July 2026, overall air quality in Farnham 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 Farnham?
On 17 July 2026, air quality conditions in Farnham will be similar to today, with NO2 forecast at fair at 24.8/100. Pollution peaks around 4:00 PM (O3: 48.7/100).
When is air pollution at its worst in Farnham?
The shoulder seasons generally bring the mildest readings of the year. In Farnham, pollution levels don't stay flat — winter and summer look pretty different. The coldest months usually bring the worst readings, as heating and temperature inversions keep A303 emissions from dispersing normally. Summer sunshine can drive up ozone locally, though overall air generally moves and clears more freely than in winter.
Are air quality levels in Farnham 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