Williamsport
 
Data and Forecasts courtesy of:
 

 
AQI: Good (0 - 50) AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Moderate (51 - 100) AQI: Moderate (51 - 100)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy for Sensitive Groups (101 - 150)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
AQI: Unhealthy (151 - 200) AQI: Unhealthy (151 - 200)
Everyone may begin to experience health effects members of sensitive groups may experience more serious health effects.
 AQI:Very Unhealthy (201 - 300) AQI: Very Unhealthy (201 - 300)
Health alert: everyone may experience more serious health effects.
AQI: Hazardous(301 - 500) AQI: Hazardous (301 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.
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
 
Data and Forecasts courtesy of:
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
40 
Good
Health Message: None
Air Quality Index (AQI)
43 
Good
Health Message: None
AQI - Pollutant Details
Ozone
40 
Good
Ozone
43 
Good
Forecast Discussion: Tropical moisture associated with the remnants of Tropical Storm Cindy is lifting northward, ahead of a cold front that will slide to our east Saturday, will bring rain showers to the region Friday evening through Saturday Morning. Warm, but dry, conditions will prevail for the remainder of the weekend with good air quality expected from Saturday into at least the middle of next week. *** Saturday’s Forecast: Rain showers through the early morning hours will end with the frontal passage ushering in drier air on a westerly breeze by mid-morning. A drier and well mixed air mass will hold ozone concentrations to the high end of the good range. Temperatures will push into the upper 80s to near 90s, but humidity levels will be falling as dew point temperatures drop into the 50s. *** Sunday’s Forecast: Breezy and dry conditions will continue Sunday with highs held slightly below normal. Highs on Sunday will approach the 80-degree mark, which is close to five degrees below what this region typically sees for late June. With the clean air mass that moved in behind the cold front on Saturday remaining relatively well mixed, ozone concentrations are expected to again remain in the higher end of the good range. *** Monday’s Forecast: Monday may turn out to be a nice day to give your air conditioning units a break as low temperatures in the morning may dip into the low 50s with highs in the afternoon only climbing into the mid 70s. If Sunday is considered unseasonably cool with temperatures about five degrees below normal, then Monday could be unseasonably cooler with nearly ten degrees of a departure from normal. Winds will be calmer than the breezy conditions from over the weekend. Ozone concentrations will be kept a little further into the good range as a disturbance passing to our north will bring at least a mix of sun and clouds to the region. Conditions will be dry enough that any showers associated with this disturbance will stay to our north or be light enough to possibly not even reach the ground before evaporating. *** Extended Outlook: We should expect to see at least one more day of the unseasonably cool and dry conditions on Tuesday before high pressure developing over the region returns the heat, humidity, and moderate air quality by late week. Highs again on Tuesday will be held to the mid 70s as high pressure begins to build from the west. Increasing sunshine on Wednesday may allow some sites to see moderate ozone concentrations as high pressure continues to build overhead. The high-pressure system will then slide just far enough east that the southwesterly flow returns for Thursday/Friday. --- Roble

Current Conditions
Data Not Available

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