SmogRank / World / Europe / Portugal / Azores
Most polluted cities in Azores, Portugal
No city in Azores, Portugal has enough readings to rank for the last 30 days.
A city joins this ranking with enough days of readings over the last 30 days; none here has that right now, so there is nothing to map or chart.
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
Updated 2026-10-02 06:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.