Worst air pollution Marlborough, today and tomorrow
Today (16 July): Air quality in Marlborough is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 34.0/100).
Tomorrow (17 July 2026): Air quality in Marlborough is fair. AQI improves to medium; 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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Marlborough's position in Wiltshire means air quality is mostly determined by local road traffic and the compact scale of the centre. Southwesterly winds do most of the work keeping things in check, more so than any local policy or infrastructure change. The M3 sees the heaviest traffic, and that shows up clearly in local roadside monitoring.
Today - 16 July | Pollution peaks at 15:00
AQI:
Fair
34.0/100
PM2.5 (fine particles):
Good
12.0/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Fair
28.2/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
4.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
11.4/100
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
16.4/100
PM10 (coarse particles):
Good
5.5/100
NO2 (nitrogen dioxide):
Fair
37.7/100
O3 (ozone):
Medium
43.6/100
SO2 (sulfur dioxide):
Good
6.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
15.3/100
Pollen forecast in Marlborough
View pollen forecastFrequently Asked Questions
Is air quality bad in Marlborough right now?
On 16 July 2026, overall air quality in Marlborough 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 Marlborough?
On 17 July 2026, air quality conditions in Marlborough will be similar to today, with NO2 forecast at fair at 37.7/100. Pollution peaks around 4:00 PM (O3: 43.6/100).
When is air pollution at its worst in Marlborough?
Marlborough's air quality follows a familiar seasonal pattern most UK towns share. In deep winter, a lack of wind lets M3 traffic fumes and woodsmoke settle instead of blowing through. Warmer months swap one problem for another — less smoke and heating pollution, but more ozone on the sunniest days. For much of spring and autumn, things settle into a fairly unremarkable middle ground.
Are air quality levels in Marlborough 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.
Want to see air quality forecasts for other cities in United Kingdom?
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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