Johnstown
 
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)
45 
Good
Health Message: None
AQI - Pollutant Details
Ozone
40 
Good
Ozone
45 
Good
Forecast Discussion: Current Conditions: As of 2 PM on Thursday, mostly sunny skies prevail over the region as high pressure builds in over the Great Lakes. The frontal system that was off to our north yesterday has now dropped southward across the southern Mid-Atlantic region. It is the high to our northwest that is keeping our flow out of the northwest today. As a result, temperatures are only rising into the upper 60s. With temperatures in the 60s and dewpoints in the 50s, ozone levels continue to remain in the good range. Expect a slight uptick in concentrations tomorrow as temperatures and dewpoints begin to rise. *** Friday's Forecast: So for Friday, mostly sunny skies will continue to persist over the region as the area of high pressure, which was over the Great Lakes on Thursday, shifts east into the Northeastern US. The clockwise flow around the high will ensure that our winds, which were out of the northwest on Thursday, will switch out of the east, southeast by the afternoon. As a result, expect some downsloping (across the Laurel Highlands) to occur. The downsloping will end up warming the air mass, allowing afternoon highs to creep back toward normal (near the 80 degree mark). In addition, dewpoint temperatures will begin to rise through the 50s. The combination of these conditions will help ozone to rise near the good / moderate threshold. --Nolan

Current Conditions
Air Quality Index (AQI)
observed at 22:00 EDT
29
Good
Health Message: None
AQI - Pollutant Details
Particles (PM2.5) 29 Good
Ozone 12 Good

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