The highest AQ index in California (as of 13:00 PDT) is currently the C San Bernardino M area. Ozone (OZONE) is measuring at 105 (Unhealthy for Sensitive Groups). This means members of sensitive groups may experience health effects. The general public is less likely to be affected.
Over the next few days, the highest Ozone (OZONE) will be in the C San Bernardino area. It is forecasted to be Unhealthy, meaning some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.
| Range | 0 - 50 | 51 - 100 | 101 - 150 | 151 - 200 | 201 - 300 | 301 - 500 |
| Color | ||||||
| Category | Good | Moderate | Unhealthy for Sensitive Groups | Unhealthy | Very Unhealthy | Hazardous |
Last Updated 6 minutes ago
Below is a list of counties in California. Click on any county below and you'll get a list of cities where we provide AQ index forecasts.