SmogRank / Burwell / Cambridge
Burwell vs Cambridge: PM2.5 compared
Over the last year, Cambridge's air was 31% more polluted than Burwell's: PM2.5 averaged 9.7 µg/m³ against 7.4, on the 129 days both cities were measured. Cambridge had the dirtier air on 56 of those days, Burwell on 73. Cambridge was over the WHO's daily guideline of 15 µg/m³ on 27 of them, Burwell on 12.
Right now
The last year, day by day
Month by month
Year by year
| Year | Burwell | Cambridge | Days Burwell was worse |
|---|---|---|---|
| 2026 so far | 47 | 55 | 44 |
| 2025 | 31 | 38 | 39 |
Means in US AQI over the days both cities were measured that year; a year shows once they share 30 such days.
Each city's worst days
Burwell
- 26 Jan 20269130.5 µg/m³
- 5 Mar 20269029.9 µg/m³
- 27 Jan 20268326.3 µg/m³
Cambridge
- 9 Mar 202613248.1 µg/m³
- 5 Mar 202612846.4 µg/m³
- 26 Jan 202612444.8 µg/m³
Daily means in US AQI, with µg/m³ beside them, since the index stops at its top value, over the days both cities were measured in the last year. Each date opens that day's world board.
Compare either city with another
Burwell
Side by side with London (United Kingdom's worst on 30 days), Gujranwala (the world's worst on 30 days).
Cambridge
Side by side with London (United Kingdom's worst on 30 days), Gujranwala (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Burwell and Cambridge, 8 Oct 2025 – 7 Oct 2026, smogrank.com/compare/gb-burwell/gb-cambridge (accessed 8 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.
Updated 2026-10-08 20:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published (why we use them).