United Kingdom City AQI Comparison
Rank cities side by side using OpenAQ PM2.5 and PM10 history normalized to US EPA AQI. This pilot covers 171 eligible cities with OpenAQ-derived daily AQI history.
Compare two cities
vs
Featured comparisons
Didcot vs Hammersmith→
Highest vs cleanest city
AQI gap 43363 / 362 days
Didcot vs Maidstone→
Highest-AQI pair
AQI gap 1363 / 80 days
Didcot vs Grays→
High vs mid-range city
AQI gap 22363 / 254 days
Maidstone vs Hammersmith→
Second-highest vs cleanest city
AQI gap 4280 / 362 days
Downham Market vs Kidbrooke→
High vs low-AQI city
AQI gap 40112 / 363 days
Maidstone vs Kidbrooke→
High vs low-AQI city
AQI gap 4180 / 363 days
Maidstone vs Downham Market→
Similar high-AQI cities
AQI gap 180 / 112 days
Downham Market vs Dagenham→
High vs low-AQI city
AQI gap 40112 / 312 days
Downham Market vs East Ham→
Similar high-AQI cities
AQI gap 1112 / 87 days
East Ham vs Penicuik→
High vs low-AQI city
AQI gap 3487 / 286 days
East Ham vs London→
Similar high-AQI cities
AQI gap 187 / 366 days
London vs Enniskillen→
High vs low-AQI city
AQI gap 32366 / 344 days
Methodology
The extractor maps OpenAQ monitoring locations to the nearest AQI Now city in the same country, aggregates PM2.5 and PM10 to daily city averages, and converts those concentrations to US EPA AQI. Country tool pages use only city summaries that satisfy the configured minimum daily coverage threshold.