Worst air pollution Leiston, today and tomorrow
Today (16 July): Air quality in Leiston is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 30.6/100).
Tomorrow (17 July 2026): Air quality in Leiston is fair. All pollutants stay as today. Pollution peaks around 2:00 PM (O3: 29.3/100). 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
Use our Strava plugin to check your own exposure.
Emissions along the A47 represent the town's main traffic-related pollution source. Being part of Suffolk, Leiston sees an air quality profile that's largely down to traffic and general town-centre activity. Thanks to easterly winds, pollution rarely lingers for long, which keeps average readings fairly unremarkable by UK standards.
Today - 16 July | Pollution peaks at 16:00
AQI:
Fair
30.6/100
PM2.5 (fine particles):
Good
11.3/100
PM10 (coarse particles):
Good
4.0/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Fair
30.6/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
8.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Fair
29.3/100
PM2.5 (fine particles):
Good
10.4/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Fair
29.3/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
7.6/100
Pollen forecast in Leiston
View pollen forecastFrequently Asked Questions
Is air quality bad in Leiston right now?
On 16 July 2026, overall air quality in Leiston is fair. AQI is the main air quality indicator at 30.6/100. Pollution peaks around 4:00 PM (O3: 30.6/100).
Will air quality be worse tomorrow in Leiston?
On 17 July 2026, air quality conditions in Leiston will be similar to today, with AQI forecast at fair at 29.3/100. Pollution peaks around 2:00 PM (O3: 29.3/100).
When is air pollution at its worst in Leiston?
Air quality in Leiston isn't the same all year round — it really shifts with the seasons. Summer sunshine can drive up ozone locally, though overall air generally moves and clears more freely than in winter. In deep winter, a lack of wind lets A47 traffic fumes and woodsmoke settle instead of blowing through. Spring and autumn are typically the easiest months, air-quality-wise, for most residents.
Are air quality levels in Leiston 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?
Check air quality in other popular cities:
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