Air Quality Conditions
Updated: Tuesday, October 17 2017 - 5:20 PM PDT
Unhealthy for Sensitive Groups
Primary Pollutants
Ozone (O3), in parts per billion (ppb)
Fine Particulate Matter (PM 2.5), in micrograms per cubic meter (μg/m3)
| Pollutant Type | Air Quality Level | Latest Concentration |
| Ozone | Unhealthy for Sensitive Groups | 81 ppb  |
| PM 2.5 | Moderate | 29 μg/m3  |
Air Quality Maps
Today's AQI Forecast
Hourly AQI (combined PM and Ozone)
|
Air Quality Index
Levels of Health Concern |
Numerical
Value |
Meaning
|
|---|---|---|
| Good | 0-50 | Air quality is considered satisfactory, and air pollution poses little or no risk. |
| Moderate | 51-100 | Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. |
|
Unhealthy for Sensitive Groups |
101-150 | Members of sensitive groups may experience health effects. The general public is not likely to be affected. |
| Unhealthy | 151-200 | Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects. |
| Very Unhealthy | 201-300 | Health alert: everyone may experience more serious health effects. |
| Hazardous | > 300 | Health warnings of emergency conditions. The entire population is more likely to be affected. |