The highest AQ index in Pennsylvania (as of 3:00 EST) is currently the Philadelphia area. Particle Pollution (PM2.5) is measuring at 52 (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 Mon Valley Area area. It is forecasted to be Good, meaning air quality is satisfactory, and air pollution poses little or no risk.
Current Conditions (Friday afternoon, 11/6/2026): A reinforcing cold front is crossing through western Pennsylvania this afternoon, bringing a shifting wind direction out of the northwest and isolated showers. There were a few readings of moderate air quality for fine particulate matter (PM2.5) earlier this morning, but the increase in wind should cause good air quality for the rest of the day. *** Saturday’s Forecast: Saturday will be breezy and much cooler with occasional lake-effect rain showers. Westerly winds may occasionally gust 20 to 30 mph. This strong airflow in the lower levels of the atmosphere will prevent pollutants from building up, leading to good air quality. *** Sunday’s Forecast: Sunshine should return on Sunday with a breezy southwest wind. Again, the wind may occasionally gust 20 to 30 mph. The air quality should remain good. *** Monday’s Forecast: Sunny and breezy conditions will continue Monday with good air quality for PM2.5. *** Extended Forecast: Dry weather is anticipated through the middle of next week with mainly good air quality for PM2.5. The steady wind will prevent pollutants from building up each day. – Curtis
| 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 9 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.