What is the air quality in Stockton CA?

Stockton CA, United States of America has an annual US AQI of 56 (Reasonable) and average PM2.5 of 12.9 µg/m³, ranking #1530 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Stockton CA?

April is typically the cleanest month (AQI 44) and December the most polluted (AQI 77).

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

PM2.5: 1998–2026 (monitors 1999–2026, satellite 1998, 2000–2001; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

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

Stockton CA Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1530	Stockton CA, United States of America	North America	AQI 56	PM2.5 12.9 µg/m³