Air Quality
Moderate
Active Contamination
90
Active Permits
3
Air quality in San Diego County is rated moderate with a median AQI of 54 (272 days measured in 2025). 90 contamination sites are tracked, all with completed or ongoing remediation. 39 EV charging stations are available in the area.
Air Quality — San Diego County (2025)i
AQSThe Air Quality Index measures how clean or polluted the air is on a given day. AQI is reported at the county level. A score of 0-50 is considered good; 51-100 is moderate; above 100 may be unhealthy for sensitive groups.
Median AQI
PM2.5 Daysi
94Ozone Daysi
178Industrial Monitoringi
Toxic Release Inventory (TRI)i
TRIWastewater & Stormwater Permits (NPDES)i
NPDESContamination Sitesi
Contaminated sites tracked by the EPA and state agencies. Superfund sites are the most seriously contaminated locations. Brownfields are former industrial properties being cleaned up for reuse. LUST sites have confirmed leaks from underground storage tanks.
EV Charging & Alternative Fuel Stationsi
AFDC