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)
45 
Good
Health Message: None
Air Quality Index (AQI)
45 
Good
Health Message: None
AQI - Pollutant Details
Ozone
45 
Good
Ozone
45 
Good
Forecast Discussion: *** Saturday’s Forecast: Unsettled weather will return to the region on Saturday with showers and thunderstorms expected over the later portion of the day. Increasing cloud cover will limit afternoon highs to the mid to upper 80s as well as limit ozone concentrations to levels in the high end of the good range. Some of the thunderstorms may produce heavy rainfall. *** Sunday’s Forecast: Cloud cover once again on Sunday will limit ozone formation to keep levels in the high end of the good range. Similar to Saturday, highs are expected to again reach the mid to upper 80s. Unsettled weather will continue with another round of showers and thunderstorms possible. These may be more scattered in development than the rainfall from Saturday. *** Monday’s Forecast: The return of some sunshine is expected on Monday, pushing temperatures into the upper 80s to near 90 degrees. However, an approaching cold front will bring a cooler and drier air mass to the region by late in the day. Even with the increase in sunshine, breezy flow out of the west will provide enough mixing to limit ozone formation. *** Extended Outlook: A much cooler and drier air mass moves in for Tuesday compared to what we have experienced over the prior week. Highs may struggle to reach the 80s with dew point temperatures falling to much more comfortable levels in the upper 50s to low 60s. Good air quality is expected with ozone concentrations again in the high end of the good range. The break from the heat and humidity will be brief, as warmer and more humid air is quick to return for Wednesday/Thursday. Air quality conditions may then return to moderate levels for ozone. --- Roble

Current Conditions
Air Quality Index (AQI)
observed at 4:00 EDT
11
Good
Health Message: None
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.
AQI - Pollutant Details
Ozone 11 Good

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