The highest AQ index in Pennsylvania (as of 2:00 EDT) is currently the Pittsburgh area. Particle Pollution (PM2.5) is measuring at 69 (Moderate). This means air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Over the next few days, the highest Particle Pollution (PM2.5) will be in the Philadelphia area. It is forecasted to be Moderate, meaning air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
***A FLOOD WATCH IS IN EFFECT UNTIL 2 PM EDT WEDNESDAY***A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM THIS EVENING****Current Conditions at 2 p.m. EDT this Tuesday afternoon: Showers and thunderstorms, some strong with heavy downpours are affecting parts of the area, and another batch will be moving in early this evening. Ozone has remained down in the good range with the rain and cloud cover, but fine particle (PM2.5) remains moderate. PM2.5 will come down some this evening, then rise up again overnight, but no worse than low moderate. *** Wednesday’s forecast: Clouds and limited sun and breezy Wednesday with showers and a thunderstorm developing. Ozone again remains in the good range, with PM2.5 concentrations averaging low moderate. Highs in the lower 80s. *** Extended forecast: Partly sunny with still the chance for a shower Thursday as low pressure finally starts moving out to sea. High pressure then brings more sunshine Friday into Saturday. Air quality remains in the good range Thursday and Friday, but then may deteriorate to moderate over the weekend as smoke from fires in the western U.S. move back into the area.---McAuliffe
| 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 4 minutes ago
Below is a list of counties in Pennsylvania. Click on any county below and you'll get a list of cities where we provide AQ index forecasts.