Worst air pollution Leigh-on-Sea, today and tomorrow
Today (16 July): Air quality in Leigh-on-Sea is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (O3: 31.3/100).
Tomorrow (17 July 2026): Air quality in Leigh-on-Sea is fair. All pollutants stay as today. Pollution peaks around 2:00 PM (O3: 35.5/100). 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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Leigh-on-Sea's position in Essex means air quality is mostly determined by local road traffic and the compact scale of the centre. Residential heating and light industry add a modest seasonal contribution, though cooler northerly winds keep overall levels moderate. The M4 generates consistent traffic-related NO₂ and PM2.5, particularly during peak commuting hours.
Today - 16 July | Pollution peaks at 17:00
AQI:
Fair
31.3/100
PM2.5 (fine particles):
Good
15.4/100
PM10 (coarse particles):
Good
5.4/100
NO2 (nitrogen dioxide):
Fair
26.5/100
O3 (ozone):
Fair
31.3/100
SO2 (sulfur dioxide):
Good
3.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
12.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Fair
35.5/100
PM2.5 (fine particles):
Good
17.3/100
PM10 (coarse particles):
Good
6.1/100
NO2 (nitrogen dioxide):
Fair
23.5/100
O3 (ozone):
Fair
35.5/100
SO2 (sulfur dioxide):
Good
3.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.7/100
PM1 (ultrafine particles):
Good
14.2/100
Pollen forecast in Leigh-on-Sea
View pollen forecastFrequently Asked Questions
Is air quality bad in Leigh-on-Sea right now?
On 16 July 2026, overall air quality in Leigh-on-Sea is fair. AQI is the main air quality indicator at 31.3/100. Pollution peaks around 5:00 PM (O3: 31.3/100).
Will air quality be worse tomorrow in Leigh-on-Sea?
On 17 July 2026, air quality conditions in Leigh-on-Sea will be similar to today, with AQI forecast at fair at 35.5/100. Pollution peaks around 2:00 PM (O3: 35.5/100).
When is air pollution at its worst in Leigh-on-Sea?
Air quality in Leigh-on-Sea isn't the same all year round — it really shifts with the seasons. Come winter, NO₂ and PM2.5 usually creep up, as heating and calmer air let M4 traffic emissions linger rather than disperse. Summer brings a different issue — stronger sunlight can push up ozone levels on hot, sunny days, even though traffic pollution itself often disperses more easily. Spring and autumn are typically the easiest months, air-quality-wise, for most residents.
Are air quality levels in Leigh-on-Sea 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