SmogRank / World / Europe / France / Normandy

Most polluted cities in Normandy, France

10 measured cities, this year; 10 above the WHO annual guideline. Worst: Le Havre at 9.2 µg/m³, #1,251 in the world.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

Île-de-France: 6 measured citiesCentre-Val de Loire: 10 measured citiesNormandy: 10 measured citiesHauts-de-France: 13 measured citiesPays de la LoireBrittany: 5 measured cities#10 La Ferté-Macé: 5.8 µg/m³#9 Alençon: 7.0 µg/m³#8 Caen: 7.4 µg/m³#7 Évreux: 7.5 µg/m³#5 Harfleur: 8.0 µg/m³#6 Cherbourg: 8.0 µg/m³#4 Val-de-Reuil: 8.1 µg/m³#3 Dieppe: 8.4 µg/m³#2 Rouen: 8.9 µg/m³#1 Le Havre: 9.2 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Dieppe 2% 2%0
Every measured city in Normandy, France, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Dieppe 2%
  2. 2Rouen 2%
  3. 3Le Havre 1%
  4. 4Harfleur 1%
  5. 5Val-de-Reuil 1%
  6. 6Cherbourg 1%
  7. 7La Ferté-Macélast full day 3 Oct 0%
  8. 8Caen 0%
  9. 9Évreux 0%
  10. 10Alençon 0%
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Estimated: cities without a monitor

Normandy cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Sotteville-lès-Rouen≈ 6 µg/m³Good
Saint-Étienne-du-Rouvray≈ 7 µg/m³Good
Le Grand-Quevilly≈ 6 µg/m³Good
Vernon≈ 5 µg/m³Good
Lisieux≈ 6 µg/m³Good
Hérouville-Saint-Clair≈ 6 µg/m³Good
Mont-Saint-Aignan≈ 6 µg/m³Good
Le Petit-Quevilly≈ 6 µg/m³Good
Fécamp≈ 6 µg/m³Good
Saint-Lô≈ 5 µg/m³Good
Louviers≈ 6 µg/m³Good
Équeurdreville-Hainneville≈ 6 µg/m³Good
Tourlaville≈ 6 µg/m³Good
Argentan≈ 5 µg/m³Good
Flers≈ 5 µg/m³Good
Elbeuf≈ 6 µg/m³Good
Octeville≈ 6 µg/m³Good
Montivilliers≈ 6 µg/m³Good
Bayeux≈ 5 µg/m³Good
Canteleu≈ 6 µg/m³Good

Bad-air episodes in Normandy

Times when many cities around here had PM2.5 at twice their usual or more on the same days.

Use this board

SmogRank, most polluted cities in Normandy, France, PM2.5, this year to 6 Oct 2026, 22:00 UTC, smogrank.com/fr/region/normandy?w=year.

Download top 10 (PNG)

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.

Updated 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.