The highest AQ index in Pennsylvania (as of 18:00 EST) is currently the Pittsburgh area. Particle Pollution (PM2.5) is measuring at 56 (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 COLD WEATHER ADVISORY IS IN EFFECT FROM 7 PM EST MONDAY UNTIL 10 AM EST TUESDAY*** Current Conditions at 2 p.m. EST this Monday afternoon: The storm continues to move out to sea with some sunshine and breezy northwesterly winds in it’s wake. Little precipitation is expected most of this week, but the cold will remain through the first days of February. In addition, morning inversions may cause fine particle pollution (PM2.5) to accumulate over the next few days. Here are the forecast details: *** Tuesday’s forecast: Times of clouds and sunshine Tuesday as temperatures get no higher than the lower or middle 20s. A morning inversion and lighter winds result in maximum PM2.5 during the morning, then lower levels in the afternoon. *** Extended forecast: The trend of higher PM2.5 continues Wednesday into Thursday, mainly in the overnight and morning hours, but concentrations improve to the good range late this week. A large trough of low pressure over eastern Canada will continue to drive cold air southward for the duration of the forecast period. We also have to monitor an area of low pressure developing off the east coast for possible impacts on our region, and this would happen over the weekend, should the storm materialize.---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.