Worst air pollution Walton upon Thames, today and tomorrow
Today (16 July): Air quality in Walton upon Thames 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 Walton upon Thames is medium. AQI improves to medium; 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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The air quality picture in Walton upon Thames reflects a typical Surrey town, with traffic emissions and local commercial activity as key contributors. The M1 sees the heaviest traffic, and that shows up clearly in local roadside monitoring. The area's changeable Atlantic weather do most of the work keeping things in check, more so than any local policy or infrastructure change.
Today - 16 July | Pollution peaks at 14:00
AQI:
Fair
35.5/100
PM2.5 (fine particles):
Good
8.4/100
PM10 (coarse particles):
Good
3.0/100
NO2 (nitrogen dioxide):
Good
8.2/100
O3 (ozone):
Fair
35.5/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.3/100
PM1 (ultrafine particles):
Good
7.6/100
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
13.4/100
PM10 (coarse particles):
Good
4.3/100
NO2 (nitrogen dioxide):
Good
11.7/100
O3 (ozone):
Medium
48.7/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.7/100
PM1 (ultrafine particles):
Good
13.6/100
Pollen forecast in Walton upon Thames
View pollen forecastFrequently Asked Questions
Is air quality bad in Walton upon Thames right now?
On 16 July 2026, overall air quality in Walton upon Thames 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 Walton upon Thames?
On 17 July 2026, air quality conditions in Walton upon Thames will be better than today, with AQI forecast at medium at 48.7/100. Pollution peaks around 4:00 PM (O3: 48.7/100).
When is air pollution at its worst in Walton upon Thames?
Here's the thing about Walton upon Thames: air quality has a clear seasonal rhythm. Winter tends to be worst, with wood burning, home heating, and still, cold air trapping traffic fumes from the M1 closer to ground level. Warmer months swap one problem for another — less smoke and heating pollution, but more ozone on the sunniest days. Spring and autumn tend to be the calmer, more moderate stretches by comparison.
Are air quality levels in Walton upon Thames 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