What is the air quality in San Bernardino CA?

San Bernardino CA, United States of America has an annual US AQI of 79 (Polluted) and average PM2.5 of 14.8 µg/m³, ranking #3728 of 5856 cities. Main pollutant: O3.

What is the cleanest month in San Bernardino CA?

February is typically the cleanest month (AQI 56) and July the most polluted (AQI 125).

Where does San Bernardino CA's air quality data come from?

PM2.5: 1998–2026 (monitors 1999–2025, satellite 1998–2001, 2004–2011, 2013–2020, 2024, model 2026). Measured by government monitoring stations. Full sources are on the methodology page.

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

San Bernardino CA Air Quality Data

Global rank	City	Continent	AQI	PM2.5
3728	San Bernardino CA, United States of America	North America	AQI 79	PM2.5 14.8 µg/m³