Worst air pollution Harwich, today and tomorrow
Today (16 July): Air quality in Harwich 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: 30.9/100).
Tomorrow (17 July 2026): Air quality in Harwich is fair. All pollutants stay as today. Pollution peaks around 2:00 PM (O3: 32.0/100). 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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Harwich's air quality reflects its position within Essex, with local traffic and the town's built-up core as the main contributors. The nearby M8 corridor contributes steady vehicle emissions that affect roadside readings. Inland breezes from the surrounding countryside do most of the work keeping things in check, more so than any local policy or infrastructure change.
Today - 16 July | Pollution peaks at 16:00
AQI:
Fair
30.9/100
PM2.5 (fine particles):
Good
9.2/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
30.9/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
7.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Fair
32.0/100
PM2.5 (fine particles):
Good
8.9/100
PM10 (coarse particles):
Good
3.1/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
32.0/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
2.3/100
PM1 (ultrafine particles):
Good
7.5/100
Pollen forecast in Harwich
View pollen forecastFrequently Asked Questions
Is air quality bad in Harwich right now?
On 16 July 2026, overall air quality in Harwich is fair. AQI is the main air quality indicator at 30.9/100. Pollution peaks around 4:00 PM (O3: 30.9/100).
Will air quality be worse tomorrow in Harwich?
On 17 July 2026, air quality conditions in Harwich will be similar to today, with AQI forecast at fair at 32.0/100. Pollution peaks around 2:00 PM (O3: 32.0/100).
When is air pollution at its worst in Harwich?
Spring and autumn don't usually cause much concern, sitting comfortably between winter's peak and summer's ozone spikes. Harwich doesn't have one fixed air quality level — it swings between two extremes each year. Come winter, NO₂ and PM2.5 usually creep up, as heating and calmer air let M8 traffic emissions linger rather than disperse. Summer's more of a mixed bag: ozone can spike in strong sun, but overall dispersion tends to be better than the depths of winter.
Are air quality levels in Harwich 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