Near Real Time
Online Ozone Data
The Ozone Season begins on April 1 of each year
All of the online hourly Ozone data on this site will be updated on an hourly basis at half past each hour (24 hours a day) during the Ozone Season.
Online Seasonal Ozone Data is updated as it is Quality Assured.
| Breakpoints for the EPA's AQI (Air Quality Index) | ||
 AQI Category |
8 Hour O3 Breakpoint | 1 Hour O3 Breakpoint |
| Good | 0 to 64 | - |
| Moderate | 65 to 84 | - |
| Unhealthy for Sensitive Groups | 85 to 104 | 125 - 164 |
| Unhealthy | 105 to 124 | 165 to 204 |
| Very Unhealthy | 125 to 374 | 205 to 404 |
