Worst air pollution Witham, today and tomorrow
Today (16 July): Air quality in Witham is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (O3: 31.3/100).
Tomorrow (17 July 2026): Air quality in Witham is fair. All pollutants stay as today. Pollution peaks around 2:00 PM (O3: 35.5/100). 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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Witham sits within Essex, and its air quality profile is driven mainly by road traffic and the density of the centre. Prevailing westerlies help ventilate the town centre, keeping air quality at moderate levels typical for the region. Emissions along the A1 represent the town's main traffic-related pollution source.
Today - 16 July | Pollution peaks at 17:00
AQI:
Fair
31.3/100
PM2.5 (fine particles):
Good
14.9/100
PM10 (coarse particles):
Good
5.2/100
NO2 (nitrogen dioxide):
Fair
24.9/100
O3 (ozone):
Fair
31.3/100
SO2 (sulfur dioxide):
Good
3.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
12.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Fair
35.5/100
PM2.5 (fine particles):
Good
16.7/100
PM10 (coarse particles):
Good
5.9/100
NO2 (nitrogen dioxide):
Fair
22.1/100
O3 (ozone):
Fair
35.5/100
SO2 (sulfur dioxide):
Good
3.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.7/100
PM1 (ultrafine particles):
Good
13.7/100
Pollen forecast in Witham
View pollen forecastFrequently Asked Questions
Is air quality bad in Witham right now?
On 16 July 2026, overall air quality in Witham is fair. AQI is the main air quality indicator at 31.3/100. Pollution peaks around 5:00 PM (O3: 31.3/100).
Will air quality be worse tomorrow in Witham?
On 17 July 2026, air quality conditions in Witham will be similar to today, with AQI forecast at fair at 35.5/100. Pollution peaks around 2:00 PM (O3: 35.5/100).
When is air pollution at its worst in Witham?
Spring and autumn are typically the easiest months, air-quality-wise, for most residents. You can roughly predict Witham's air quality just by knowing the time of year. In deep winter, a lack of wind lets A1 traffic fumes and woodsmoke settle instead of blowing through. Summer's more of a mixed bag: ozone can spike in strong sun, but overall dispersion tends to be better than the depths of winter.
Are air quality levels in Witham 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