Worst air pollution Bolton, today and tomorrow
Today (16 July): Air quality in Bolton 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: 28.3/100).
Tomorrow (17 July 2026): Air quality in Bolton is fair. All pollutants stay as today. Pollution peaks around 2:00 PM (O3: 27.1/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Bolton's air quality reflects its position within Bolton, with local traffic and the town's built-up core as the main contributors. Emissions along the A34 represent the town's main traffic-related pollution source. Onshore breezes 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
28.3/100
PM2.5 (fine particles):
Good
12.0/100
PM10 (coarse particles):
Good
4.3/100
NO2 (nitrogen dioxide):
Good
8.9/100
O3 (ozone):
Fair
28.3/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.9/100
PM1 (ultrafine particles):
Good
9.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Fair
27.1/100
PM2.5 (fine particles):
Good
14.6/100
PM10 (coarse particles):
Good
5.3/100
NO2 (nitrogen dioxide):
Good
9.3/100
O3 (ozone):
Fair
27.1/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.6/100
PM1 (ultrafine particles):
Good
11.4/100
Pollen forecast in Bolton
View pollen forecastFrequently Asked Questions
Is air quality bad in Bolton right now?
On 16 July 2026, overall air quality in Bolton is fair. AQI is the main air quality indicator at 28.3/100. Pollution peaks around 3:00 PM (O3: 28.3/100).
Will air quality be worse tomorrow in Bolton?
On 17 July 2026, air quality conditions in Bolton will be similar to today, with AQI forecast at fair at 27.1/100. Pollution peaks around 2:00 PM (O3: 27.1/100).
When is air pollution at its worst in Bolton?
Spring and autumn don't usually cause much concern, sitting comfortably between winter's peak and summer's ozone spikes. You can roughly predict Bolton's air quality just by knowing the time of year. Come winter, NO₂ and PM2.5 usually creep up, as heating and calmer air let A34 traffic emissions linger rather than disperse. By summer, ozone tends to rise on bright days, while better ventilation generally keeps particulate and NO₂ levels lower than winter.
Are air quality levels in Bolton 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