The highest AQ index in California (as of 20:00 PDT) is currently the W San Fernando Vly area. Ozone (OZONE) is measuring at 240 (Very Unhealthy). This means health alert: The risk of health effects is increased for everyone.
Over the next few days, the highest Ozone (OZONE) will be in the C San Bernardino area. It is forecasted to be Unhealthy for Sensitive Groups, meaning members of sensitive groups may experience health effects. The general public is less likely to be affected.
| 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 8 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.