Worst air pollution Borehamwood, today and tomorrow
Today (16 July): Air quality in Borehamwood 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: 34.0/100).
Tomorrow (17 July 2026): Air quality in Borehamwood is medium. 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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Being part of Hertfordshire, Borehamwood sees an air quality profile that's largely down to traffic and general town-centre activity. Moist Atlantic fronts help ventilate the town centre, keeping air quality at moderate levels typical for the region. Commuter traffic feeding onto the A47 adds a further, consistent contribution to local readings.
Today - 16 July | Pollution peaks at 15:00
AQI:
Fair
34.0/100
PM2.5 (fine particles):
Good
8.9/100
PM10 (coarse particles):
Good
3.0/100
NO2 (nitrogen dioxide):
Good
11.0/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
8.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Medium
43.6/100
PM2.5 (fine particles):
Good
12.2/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Good
15.6/100
O3 (ozone):
Medium
43.6/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
11.4/100
Pollen forecast in Borehamwood
View pollen forecastFrequently Asked Questions
Is air quality bad in Borehamwood right now?
On 16 July 2026, overall air quality in Borehamwood 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 Borehamwood?
On 17 July 2026, air quality conditions in Borehamwood will be better than today, with AQI forecast at medium at 43.6/100. Pollution peaks around 4:00 PM (O3: 43.6/100).
When is air pollution at its worst in Borehamwood?
Borehamwood doesn't have one fixed air quality level — it swings between two extremes each year. Warmer months swap one problem for another — less smoke and heating pollution, but more ozone on the sunniest days. The coldest months usually bring the worst readings, as heating and temperature inversions keep A47 emissions from dispersing normally. The shoulder seasons generally bring the mildest readings of the year.
Are air quality levels in Borehamwood 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