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 Friday, overcast skies prevail over the region as light showers / thundershowers begin to develop over western PA. Right now, many of the showers are off to our north and east. Light southerly flow along with the cloud cover is helping to keep temperatures within the upper 70s. The low winds along with the elevated humidity levels are helping to drive PM 2.5 levels into the moderate range. Ozone continues to remain confined to the good range. Expect this trend to continue through the early part of the weekend as more showers move into the region. As the sun makes a reappearance early next week, ozone levels are likely to rebound. Here are the day-to-day details... *** Weekend Forecast: Over the weekend, expect clouds to persist early on as we continue to contend with a weak frontal system over PA. This frontal system will continue to be the focal point for shower development. Therefore, the chance of isolated showers persist for much of the day on Saturday. As we roll into Sunday, the clouds will begin to diminish (from north to south) as the frontal system, which has plagued our region with clouds and rain, drops south of our area. At the same time, a new area of high pressure will build in over the Northeastern US. This high will remain in place through the middle of the week. Therefore, expect the skies to turn sunny with temperatures rebounding into the 80s. Ozone levels, after staying low early in the period, are expected to rebound into the moderate range late in the period as a result of more sunshine (key in the photochemistry necessary to form ozone) along with the seasonably warm temperatures over western PA. --Nolan

Current Conditions
Air Quality Index (AQI)
observed at 10:00 EDT
31
Good
Health Message: None
AQI - Pollutant Details
Particles (PM2.5) 31 Good
Ozone 9 Good

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