Worst air pollution Caldicot, today and tomorrow
Today (16 July): Air quality in Caldicot 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 Caldicot 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: 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 A55 generates consistent traffic-related NO₂ and PM2.5, particularly during peak commuting hours. Being part of Monmouthshire, Caldicot sees an air quality profile that's largely down to traffic and general town-centre activity. Easterly winds tend to disperse pollutants reasonably well, keeping readings close to typical UK small-town levels.
Today - 16 July | Pollution peaks at 15:00
AQI:
Fair
34.0/100
PM2.5 (fine particles):
Good
9.9/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Good
17.2/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
9.4/100
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
13.5/100
PM10 (coarse particles):
Good
4.5/100
NO2 (nitrogen dioxide):
Fair
23.2/100
O3 (ozone):
Medium
43.6/100
SO2 (sulfur dioxide):
Good
3.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
12.6/100
Pollen forecast in Caldicot
View pollen forecastFrequently Asked Questions
Is air quality bad in Caldicot right now?
On 16 July 2026, overall air quality in Caldicot 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 Caldicot?
On 17 July 2026, air quality conditions in Caldicot will be similar to today, with NO2 forecast at fair at 23.2/100. Pollution peaks around 4:00 PM (O3: 43.6/100).
When is air pollution at its worst in Caldicot?
In Caldicot, pollution levels don't stay flat — winter and summer look pretty different. Warmer months swap one problem for another — less smoke and heating pollution, but more ozone on the sunniest days. Winter tends to be worst, with wood burning, home heating, and still, cold air trapping traffic fumes from the A55 closer to ground level. Spring and autumn usually sit somewhere in between, so it's really the extremes of the year worth watching.
Are air quality levels in Caldicot 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