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)
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: Current Conditions as of 1 PM on Friday: Unseasonably warm conditions will continue through this weekend, though not quite as hazy, hot, and humid as this past week. High pressure will cause most areas under the recent dry spell to remain rain free yet again, but the pattern may change as early as the middle of next week to return conditions back to near normal. *** Saturday’s Forecast: Dew point temperatures will gradually fall over the course of the day on Saturday, leading to a slight decrease in humidity levels. After patchy morning fog and some low level clouds, mostly sunny skies will return by the middle of the afternoon as temperatures climb into the low 80s. High pressure situated more to our north and east will allow for the flow to be an east to southeasterly breeze. Typically when we see onshore flow, air quality conditions improve as a result of the cleaner maritime air mass that would be moving in. Ozone concentrations will remain inside the good range. *** Sunday’s Forecast: Warm and dry conditions will continue on Sunday with temperatures again reaching the low 80s under mostly sunny skies. Air quality wise, Sunday should be the best day of the period. Ozone concentrations will continue to remain in the good range as the light southeasterly flow continues. *** Monday’s Forecast: Warmer and more humid conditions will begin to return by Monday as the winds turn more southerly. Despite starting to approach the end of ozone season, conditions for the first half of the week starting on Monday will be favorable for high good to low moderate ozone levels with temperatures well above normal, in the mid to upper 80s. *** Tuesday’s Forecast: Just as Sunday is likely to be the most favorable air quality day of the forecast, Tuesday is likely going to be the least favorable. With the work week starting back up for most, a continuation of light southwesterly flow, and temperatures still well above normal, near 90 degrees, ozone concentrations could push into the low moderate range. The possibility for some afternoon convection creating some clouds could help limit how high the levels climb, but will need to be something to keep an eye on over the course of the weekend. *** Extended Outlook: Conditions should become a little more unsettled by Wednesday, though temperatures will remain well above normal and humid conditions will continue. The increase in cloud cover should help to limit ozone concentrations to the good range for the second half of the week. After temperatures are well into the 80s again on Wednesday, we should see a return to more seasonable levels by late week and into the weekend. --- Roble

Current Conditions
Air Quality Index (AQI)
observed at 5:00 EDT
27
Good
Health Message: None
AQI - Pollutant Details
Ozone 27 Good

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