What is the air quality in Philadelphia PA?

Philadelphia PA, United States of America has an annual US AQI of 54 (Reasonable) and average PM2.5 of 11.5 µg/m³, ranking #1227 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Philadelphia PA?

October is typically the cleanest month (AQI 47) and July the most polluted (AQI 61).

Where does Philadelphia PA's air quality data come from?

PM2.5: 1998–2026 (monitors 1999–2026, satellite 1998; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

Philadelphia PA, United States of America — Air Quality & Clean City Guide 2026

Philadelphia PA Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1227	Philadelphia PA, United States of America	North America	AQI 54	PM2.5 11.5 µg/m³