What is the air quality in Chico CA?

Chico CA, United States of America has an annual US AQI of 50 (Reasonable) and average PM2.5 of 9.5 µg/m³, ranking #727 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Chico CA?

March is typically the cleanest month (AQI 41) and August the most polluted (AQI 59).

Where does Chico CA's air quality data come from?

PM2.5: 1998–2026 (monitors 2012–2026, satellite 1998–2012; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

Chico CA, United States of America — Air Quality & Clean City Guide 2026

Chico CA Air Quality Data

Global rank	City	Continent	AQI	PM2.5
727	Chico CA, United States of America	North America	AQI 50	PM2.5 9.5 µg/m³