Porterville Weather 
Air Quality Forecast
Updated: Friday, May 16 2008 - 1:20 AM PDT
| Day | Air Quality Level | Air Quality Index | Primary Pollutant |
| Current | Moderate |  |
PM 2.5 |
| Current | Good |  |
OZONE |
| Friday | Unhealthy for Sensitive Groups |  |
OZONE |
| Saturday | Unhealthy for Sensitive Groups | |
OZONE |
| Sunday | Unhealthy for Sensitive Groups | |
OZONE |
| Monday | Unhealthy for Sensitive Groups | |
OZONE |
| Tuesday | Unhealthy for Sensitive Groups | |
OZONE |
Air Quality Maps
|
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. |