The highest AQ index in Pennsylvania (as of 5:00 EST) is currently the Liberty-Clairton Area area. Particle Pollution (PM2.5) is measuring at 81 (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.
Current Conditions As of 2 PM on Monday: Surface high pressure is located off the New England Coast allowing for more of a cool, maritime, east to southeast wind today keeping temperatures down in the low 60’s. A combination of light wind flow, and continue lack of moisture/rain, will promote PM2.5 levels in the low-moderate range, especially in the city, with slightly lower levels in the suburbs. *** Tuesday’s forecast: As a warm front passes well to the north, it is expected to turn warmer into the mid-70’s with a south to southwest wind on Tuesday and low-moderate PM2.5 levels continuing. *** Wednesday’s forecast: The next cold front then approaches Wednesday. Once again, this front does not look like it will produce much needed rainfall. Increasing mixing with a northwesterly wind will lead to good air quality Wednesday and Thursday. ---VanLenten
| 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 15 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.