Caen vs Cherbourg: PM2.5 compared
Over the last year, Cherbourg's air was 5% more polluted than Caen's: PM2.5 averaged 7.8 µg/m³ against 7.4, on the 323 days both cities were measured. Cherbourg had the dirtier air on 213 of those days, Caen on 107. Cherbourg was over the WHO's daily guideline of 15 µg/m³ on 25 of them, Caen on 26.
Right now
The last year, day by day
Month by month
Year by year
| Year | Caen | Cherbourg | Days Caen was worse |
|---|---|---|---|
| 2026 so far | 41 | 44 | 80 |
| 2025 | 47 | 50 | 92 |
| 2024 | 37 | 42 | 38 |
| 2023 | 52 | 45 | 35 |
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
Caen
- 20 Mar 202611139.5 µg/m³
- 8 Mar 202610035.2 µg/m³
- 23 Mar 20269331.6 µg/m³
Cherbourg
- 8 Mar 202610436.8 µg/m³
- 20 Mar 202610336.5 µg/m³
- 7 Mar 20268225.6 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
Caen
Side by side with Le Havre (the nearest), Nice (France's worst on 30 days), Gujranwala (the world's worst on 30 days).
Cherbourg
Side by side with Nice (France's worst on 30 days), Gujranwala (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Caen and Cherbourg, 11 Oct 2025 – 10 Oct 2026, smogrank.com/compare/fr-caen/fr-cherbourg (accessed 11 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 2026-10-11 05:07 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); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).