SmogRank / World / Europe / France / Grand Est

Most polluted cities in Grand Est, France

10 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Nancy at 7.7 µg/m³, #1,057 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 citiesBourgogne-Franche-Comté: 4 measured citiesHauts-de-France: 13 measured citiesGrand Est: 10 measured cities#10 Revin: 4.3 µg/m³#9 Épinal: 4.9 µg/m³#8 Saint-Dizier: 5.6 µg/m³#7 Metz: 6.7 µg/m³#5 Mulhouse: 6.9 µg/m³#6 Lunéville: 6.9 µg/m³#4 Reims: 7.2 µg/m³#3 Strasbourg: 7.3 µg/m³#2 Thionville: 7.5 µg/m³#1 Nancy: 7.7 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Nancy 0% 0.75%0
Every measured city in Grand Est, 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. 1Nancy 0%
  2. 2Thionville 0%
  3. 3Strasbourg 0%
  4. 4Reimslast full day 3 Oct 0%
  5. 5Mulhouse 0%
  6. 5Lunéville 0%
  7. 7Metzlast full day 3 Oct 0%
  8. 8Saint-Dizier 0%
  9. 9Épinal 0%
  10. 10Revinlast full day 3 Oct 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

Grand Est 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
Charleville-Mézières≈ 5 µg/m³Good
Châlons-en-Champagne≈ 7 µg/m³Good
Schiltigheim≈ 13 µg/m³Moderate
Vandœuvre-lès-Nancy≈ 8 µg/m³Good
Chaumont≈ 5 µg/m³Good
Illkirch-Graffenstaden≈ 13 µg/m³Moderate
Montigny-lès-Metz≈ 9 µg/m³Moderate
Saint-Dié-des-Vosges≈ 7 µg/m³Good
Sarreguemines≈ 10 µg/m³Moderate
Saint-Louis≈ 12 µg/m³Moderate
Sedan≈ 5 µg/m³Good
Sélestat≈ 12 µg/m³Moderate
Bar-le-Duc≈ 6 µg/m³Good
Saint-Avold≈ 8 µg/m³Good
Toul≈ 8 µg/m³Good
Bischheim≈ 13 µg/m³Moderate
Lingolsheim≈ 13 µg/m³Moderate
Vitry-le-François≈ 7 µg/m³Good
Laxou≈ 8 µg/m³Good
Villers-lès-Nancy≈ 8 µg/m³Good
Wittenheim≈ 10 µg/m³Moderate
Yutz≈ 9 µg/m³Moderate
Hayange≈ 9 µg/m³Moderate
Illzach≈ 11 µg/m³Moderate
Pont-à-Mousson≈ 8 µg/m³Good

Bad-air episodes in Grand Est

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 Grand Est, France, PM2.5, last 30 days to 6 Oct 2026, 22:00 UTC, smogrank.com/fr/region/grand-est?w=30d.

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.