Williamsport
 
Data courtesy of:
 

 
AQI: Good (0 - 50) AQI: Moderate (51 - 100) AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy (151 - 200) AQI: Very Unhealthy (201 - 300) AQI: Hazardous(301 - 500) Action DayAction Day
 
Local Air Quality Resources
 
State Air Quality Resources
Air Quality Partnership of Lehigh Valley - Berks
Air Quality Partnership of the Delaware Valley
Air Quality Partnership of the Susquehanna Valley
American Lung Association (ALA) of Pennsylvania
PA Allergy & Asthma Association
Pennsylvania DEP - BAQ - Contacts
Pennsylvania DEP - BAQ - Current Air Quality Index (AQI) by Area
Pennsylvania DEP - Bureau of Air Quality (BAQ)
Pennsylvania DEP – Air Quality Forecast Home Page
Pennsylvania DEP – Home Page
Southwest PA Air Quality Partnership
Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
34 
Good
Health Message: None
Air Quality Index (AQI)
37 
Good
Health Message: None
AQI - Pollutant Details
Ozone
34 
Good
Ozone
37 
Good
Forecast Discussion: Clouds will develop Wednesday out ahead of a weak front slipping southeastward from the Great Lakes. Ozone will be held to the good range as a result. As high pressure builds over the area on Thursday, there will be more sunshine. The added sunshine will cause ozone levels to go low moderate in spots. As high pressure moves off the east coast late this week into the weekend, more of an onshore flow will develop. Onshore flow coupled with the chance for afternoon and evening thunderstorms may be a limiting factor in ozone formation, so upper good levels are most likely.

Current Conditions
Air Quality Index (AQI)
observed at 22:00 EDT
4
Good
Health Message: None
AQI - Pollutant Details
Ozone 4 Good

Past Air Quality Maps and Data
Yesterday's Maps and Data
Air Quality Maps Archives (by region)