Legend (Internet/AirQualityLayers)

Monitoring (PM2.5) (0) Monitoring (OZONE) (1) Schools (2) Summits (3) Coutours (1000 ft) (4) 950 1000 1050 AQI Contours (5) Good Moderate Unhealthy for Sensitive Groups Unhealthy Very Unhealthy Hazardous AQI_Observed (6) Shasta County (7)