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 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)
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: Current Conditions: As of 2 PM on Wednesday, mostly sunny skies persist across much of western PA as an area of high pressure resides over the northern Mid-Atlantic region. Right now, light winds coupled with the abundant sunshine is helping to drive temperatures into the 80s. The sunshine along with the warm temperatures are also driving ozone concentrations into the moderate category. With increasing cloud cover and rain chances expected tomorrow, air quality levels are expected to remain within the good threshold. *** Thursday's Forecast: So for Thursday, mostly cloudy skies will prevail over western PA as a frontal system remains just to the south of our area. A disturbance moving along the front will first trigger the cloud cover and then the increased chance of rain during the afternoon as it moves to the east. The cloudy skies will be enough to limit afternoon highs to the 80s while reducing ozone formation to the good category. --Nolan

Current Conditions
Air Quality Index (AQI)
observed at 10:00 EDT
51
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
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 5 Good
Particles (PM2.5) 51 Moderate

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