SmogRank / Countries / Belgium / Wallonia
Most polluted cities in Wallonia, Belgium
12 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Flémalle-Haute at 6.8 µg/m³, #924 in the world.
12 good
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+
Estimated: cities without a monitor
Wallonia 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.
| City | 7-day estimate |
|---|---|
| La Louvière | ≈ 7 µg/m³ |
| Seraing | ≈ 6 µg/m³ |
| Verviers | ≈ 6 µg/m³ |
| Mouscron | ≈ 10 µg/m³ |
| Braine-l'Alleud | ≈ 8 µg/m³ |
| Herstal | ≈ 8 µg/m³ |
| Châtelet | ≈ 6 µg/m³ |
| Wavre | ≈ 7 µg/m³ |
| Binche | ≈ 7 µg/m³ |
| Waterloo | ≈ 8 µg/m³ |
| Louvain-la-Neuve | ≈ 7 µg/m³ |
| Courcelles | ≈ 7 µg/m³ |
| Ath | ≈ 9 µg/m³ |
| Arlon | ≈ 9 µg/m³ |
| Soignies | ≈ 7 µg/m³ |
| Nivelles | ≈ 7 µg/m³ |
| Marcinelle | ≈ 7 µg/m³ |
| Oupeye | ≈ 8 µg/m³ |
| Saint-Nicolas | ≈ 8 µg/m³ |
| Saint-Ghislain | ≈ 8 µg/m³ |
| Manage | ≈ 7 µg/m³ |
| Fleurus | ≈ 7 µg/m³ |
| Gembloux | ≈ 6 µg/m³ |
| Grivegnée | ≈ 8 µg/m³ |
| Chaudfontaine | ≈ 6 µg/m³ |
| Frameries | ≈ 7 µg/m³ |
| Braine-le-Comte | ≈ 8 µg/m³ |
| Boussu | ≈ 8 µg/m³ |
| Gilly | ≈ 6 µg/m³ |
| Huy | ≈ 6 µg/m³ |
| Colfontaine | ≈ 7 µg/m³ |
| Jambes | ≈ 6 µg/m³ |
| Montignies-sur-Sambre | ≈ 6 µg/m³ |
| Quaregnon | ≈ 7 µg/m³ |
| Morlanwelz-Mariemont | ≈ 7 µg/m³ |
| Tubize | ≈ 8 µg/m³ |
| Lessines | ≈ 9 µg/m³ |
| Walcourt | ≈ 6 µg/m³ |
| Châtelineau | ≈ 6 µg/m³ |
| Visé | ≈ 8 µg/m³ |
Updated 2026-10-01 19:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.