The highest AQ index in Pennsylvania (as of 7:00 EDT) is currently the Susquehanna Valley area. Particle Pollution (PM2.5) is measuring at 64 (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 Lehigh Valley 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 2 p.m. EDT this Friday afternoon: Skies are partly sunny across the area with ozone and fine particle pollution (PM2.5) down inside the good range. A couple of systems are expected to deliver rain showers, one on Saturday, and the other late Sunday into Sunday night. Here are the forecast details: *** Saturday’s forecast: Mostly cloudy Saturday with rain showers moving in as a weak low pressure system moves through. Ozone buildups will not be a factor with the cloud cover, but PM2.5 might go moderate for several hours due to light surface flow. *** Sunday’s forecast: Sunday will be the warmest day of the forecast period with partly sunny skies and high temperatures in the lower and middle 70s. Ozone might rise a little higher, but still in the good range. PM2.5 will reach moderate for a good part of the day. Showers and perhaps a thunderstorm are likely late in the day into Sunday night with the approach of a cold front. *** Monday’s forecast: Breezy and not as warm Monday with clouds giving way to some sunshine. Good air quality is expected as highs only reach the middle 60s. *** Extended forecast: After a chilly start, Tuesday turns out mostly sunny as temperatures recover to the middle and upper 60s. Air quality will continue to be in the good range. The next low pressure system may bring the chance for rain back into the picture on Wednesday, followed by breezy conditions Thursday. Air quality will stay in the good range during the midweek period.---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 |
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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.