London Average Air Quality Levels

The data shows roadside and background average readings for Nitric Oxide, Nitrogen Dioxide, Oxides of Nitrogen, Ozone, Particulate Matter (PM10 and PM2.5), and Sulphur Dioxide. Measured in Micrograms per Cubic Meter of Air (ug/m3). The spreadsheet shows which Index level each reading falls in, and contains charts showing pollutant levels by time of day per month.

Trend graphs of Nitrogen Dioxide and Particulate Matter PM2.5 are on the London Dashboard.

Link to GLA Air Quality page

Data and Resources

Additional Info

Field Value
Source https://data.london.gov.uk/dataset/london-average-air-quality-levels-ep8rw
Last Updated March 25, 2026, 14:36 (UTC)
Created October 22, 2025, 12:15 (UTC)
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Language
dcat_issued 2014-09-04T15:41:00.000Z
dcat_modified 2019-08-08T10:46:11.000Z
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harvest_source_title london