SmogRank / Rankings

All cities by PM2.5: last 7 days

0 cities with enough measurements in this window, worst first.

No city has enough measurements for this window yet.

Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

Updated 2026-10-01 02:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.