SmogRank / World / Europe / The Netherlands / Friesland
Most polluted cities in Friesland, The Netherlands
No city in Friesland, The Netherlands has enough readings to rank for the last 24 hours.
48 monitors in The Netherlands stopped reporting on 4 Oct, 02:00 local time. Cities that rely on them are missing from the 24-hour board and may drop from the longer ones; that isn't clean air, and they return when the data does.
A city joins the 24-hour ranking with 18 hours of readings in the last 24; none here has that right now, so there is nothing to map or chart.
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
Friesland 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 |
|---|---|
| Leeuwarden | ≈ 9 µg/m³ |
| Drachten | ≈ 8 µg/m³ |
| Heerenveen | ≈ 10 µg/m³ |
| Sneek | ≈ 8 µg/m³ |
| Harlingen | ≈ 8 µg/m³ |
Updated 2026-10-05 02:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.