The highest AQ index in Pennsylvania (as of 10:00 EDT) is currently the Pittsburgh area. Particle Pollution (PM2.5) is measuring at 47 (Good). This means air quality is satisfactory, and air pollution poses little or no risk.
Over the next few days, the highest Ozone (OZONE) will be in the Pittsburgh 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 at 3 p.m. EDT this Thursday afternoon: Skies are partly sunny across the area with breezy northwest winds transporting a clean air mass in. As a result, ozone and fine particle (PM2.5) formation has been limited. A north to northwest flow will continue through the upcoming weekend with mainly good air quality but with below normal temperatures for the last few days of May. Here are the forecast details: *** Friday’s forecast: Mostly sunny Friday with a nice afternoon weather wise as temperatures move into the middle 70s. With the strong sun, ozone formation will go moderate in parts of the area, but an adequate amount of mixing keeps PM2.5 down inside the good range. *** Extended forecast: Mostly sunny with a cool north wind Saturday. Strong mixing and clean background air will mean low ozone and PM2.5 values. Highs will only reach the upper 60s. A large area of high pressure nosing into the area from southern Canada will keep us rain free into early next week with temperatures slightly below average. Air quality may turn moderate again Monday into Tuesday.---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 25 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.