Worst air pollution Stevenage, today and tomorrow
Today (16 July): Air quality in Stevenage 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: 31.6/100).
Tomorrow (17 July 2026): Air quality in Stevenage is fair. All pollutants stay as today. Pollution peaks around 3:00 PM (O3: 37.8/100). 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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Like much of Hertfordshire, Stevenage's air quality is shaped less by industry these days and more by everyday road traffic. Onshore breezes offer a degree of natural ventilation, keeping pollution broadly in line with comparable UK towns. The nearby A40 corridor contributes steady vehicle emissions that affect roadside readings.
Today - 16 July | Pollution peaks at 16:00
AQI:
Fair
31.6/100
PM2.5 (fine particles):
Good
7.5/100
PM10 (coarse particles):
Good
2.7/100
NO2 (nitrogen dioxide):
Good
6.5/100
O3 (ozone):
Fair
31.6/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.8/100
PM1 (ultrafine particles):
Good
6.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Fair
37.8/100
PM2.5 (fine particles):
Good
11.5/100
PM10 (coarse particles):
Good
4.0/100
NO2 (nitrogen dioxide):
Good
8.8/100
O3 (ozone):
Fair
37.8/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.0/100
PM1 (ultrafine particles):
Good
10.3/100
Pollen forecast in Stevenage
View pollen forecastFrequently Asked Questions
Is air quality bad in Stevenage right now?
On 16 July 2026, overall air quality in Stevenage is fair. AQI is the main air quality indicator at 31.6/100. Pollution peaks around 4:00 PM (O3: 31.6/100).
Will air quality be worse tomorrow in Stevenage?
On 17 July 2026, air quality conditions in Stevenage will be similar to today, with AQI forecast at fair at 37.8/100. Pollution peaks around 3:00 PM (O3: 37.8/100).
When is air pollution at its worst in Stevenage?
Air quality in Stevenage isn't the same all year round — it really shifts with the seasons. Warmer months swap one problem for another — less smoke and heating pollution, but more ozone on the sunniest days. Come winter, NO₂ and PM2.5 usually creep up, as heating and calmer air let A40 traffic emissions linger rather than disperse. Spring and autumn are typically the easiest months, air-quality-wise, for most residents.
Are air quality levels in Stevenage 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