Most polluted cities in Norway
0 measured cities, last 24 hours.
No city has enough measurements for this window yet.
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
Norway 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 |
|---|---|
| Stavanger | ≈ 7 µg/m³ |
| Sandnes | ≈ 7 µg/m³ |
| Sandefjord | ≈ 5 µg/m³ |
| Asker | ≈ 6 µg/m³ |
| Tønsberg | ≈ 5 µg/m³ |
| Ålesund | ≈ 3 µg/m³ |
| Skien | ≈ 4 µg/m³ |
| Tromsø | ≈ 3 µg/m³ |
| Haugesund | ≈ 6 µg/m³ |
| Arendal | ≈ 6 µg/m³ |
| Sola | ≈ 7 µg/m³ |
| Hamar | ≈ 4 µg/m³ |
| Horten | ≈ 5 µg/m³ |
| Grimstad | ≈ 5 µg/m³ |
| Kristiansund | ≈ 4 µg/m³ |
| Larvik | ≈ 4 µg/m³ |
| Molde | ≈ 3 µg/m³ |
| Halden | ≈ 4 µg/m³ |
| Harstad | ≈ 3 µg/m³ |
| Levanger | ≈ 3 µg/m³ |
| Time | ≈ 7 µg/m³ |
| Tromsdalen | ≈ 2 µg/m³ |
| Kongsberg | ≈ 3 µg/m³ |
| Stjørdalshalsen | ≈ 3 µg/m³ |
| Alta | ≈ 1 µg/m³ |
Updated 2026-10-01 23:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.