Worst air pollution Leytonstone, today and tomorrow
Today (20 September): Air quality in Leytonstone is moderate. AQI, PM2.5, and NO2 are moderate; PM10 and O3 are fair; SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (PM2.5: 40.4/100).
Tomorrow (21 September 2026): Air quality in Leytonstone is moderate. PM10 increases to moderate; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 8:00 PM (NO2: 58.4/100). Airmine updates local air quality forecasts four times daily.
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Traffic on the M1 is the most significant local emissions source, especially at peak times. Leytonstone's position in Waltham Forest means air quality is mostly determined by local road traffic and the compact scale of the centre. Shifting coastal winds offer a degree of natural ventilation, keeping pollution broadly in line with comparable UK towns.
Today - 20 September | Pollution peaks at 23:00
AQI:
Moderate
40.4/100
PM2.5 (fine particles):
Moderate
40.4/100
PM10 (coarse particles):
Fair
24.8/100
NO2 (nitrogen dioxide):
Moderate
40.1/100
O3 (ozone):
Fair
22.4/100
SO2 (sulfur dioxide):
Good
5.6/100
CO (carbon monoxide):
Good
0.9/100
HCHO (formaldehyde):
Good
8.3/100
PM1 (ultrafine particles):
Good
15.8/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 20:00
AQI:
Moderate
58.4/100
PM2.5 (fine particles):
Moderate
51.9/100
PM10 (coarse particles):
Moderate
42.3/100
NO2 (nitrogen dioxide):
Moderate
58.4/100
O3 (ozone):
Fair
26.9/100
SO2 (sulfur dioxide):
Good
13.3/100
CO (carbon monoxide):
Good
1.6/100
HCHO (formaldehyde):
Good
19.8/100
PM1 (ultrafine particles):
Fair
34.9/100
Pollen forecast in Leytonstone
View pollen forecastFrequently Asked Questions
Is air quality bad in Leytonstone right now?
On 20 September 2026, overall air quality in Leytonstone is moderate. AQI is the main air quality indicator at 40.4/100. Pollution peaks around 11:00 PM (PM2.5: 40.4/100).
Will air quality be worse tomorrow in Leytonstone?
On 21 September 2026, air quality conditions in Leytonstone will be similar to today, with AQI forecast at moderate at 58.4/100. Pollution peaks around 8:00 PM (NO2: 58.4/100).
When is air pollution at its worst in Leytonstone?
For much of spring and autumn, things settle into a fairly unremarkable middle ground. Ask a local in Leytonstone and they'll tell you air quality changes noticeably from season to season. Winter mornings can be the trickiest, with cold, still conditions trapping M1 traffic fumes and smoke from home fires close to the ground. 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 Leytonstone 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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