Air Quality in Pennsylvania
10-year air quality trends for 40 monitored areas in Pennsylvania.
See full Pennsylvania air quality rankings →All Monitored Areas in Pennsylvania
Wyoming, Pennsylvania
Wyoming County · AQI 33 (5yr avg) · Improving · PM2.5
Mercer, Pennsylvania
Mercer County · AQI 42 (5yr avg) · Improving · Ozone
Monroe, Pennsylvania
Monroe County · AQI 35 (5yr avg) · Improving · Ozone
Westmoreland, Pennsylvania
Westmoreland County · AQI 42 (5yr avg) · Improving · PM2.5
Bucks, Pennsylvania
Bucks County · AQI 37 (5yr avg) · Improving · Ozone
Erie, Pennsylvania
Erie County · AQI 39 (5yr avg) · Improving · PM2.5
Clearfield, Pennsylvania
Clearfield County · AQI 33 (5yr avg) · Improving · Ozone
Northampton, Pennsylvania
Northampton County · AQI 44 (5yr avg) · Improving · PM2.5
Chester, Pennsylvania
Chester County · AQI 45 (5yr avg) · Improving · PM2.5
Lackawanna, Pennsylvania
Lackawanna County · AQI 41 (5yr avg) · Improving · PM2.5
Susquehanna, Pennsylvania
Susquehanna County · AQI 32 (5yr avg) · Improving · PM2.5
Elk, Pennsylvania
Elk County · AQI 35 (5yr avg) · Stable · Ozone
Somerset, Pennsylvania
Somerset County · AQI 35 (5yr avg) · Stable · Ozone
Tioga, Pennsylvania
Tioga County · AQI 39 (5yr avg) · Improving · Ozone
Armstrong, Pennsylvania
Armstrong County · AQI 45 (5yr avg) · Improving · PM2.5
Blair, Pennsylvania
Blair County · AQI 44 (5yr avg) · Improving · PM2.5
Cumberland, Pennsylvania
Cumberland County · AQI 46 (5yr avg) · Improving · PM2.5
Lawrence, Pennsylvania
Lawrence County · AQI 33 (5yr avg) · Stable · Ozone
Lebanon, Pennsylvania
Lebanon County · AQI 46 (5yr avg) · Improving · PM2.5
Luzerne, Pennsylvania
Luzerne County · AQI 34 (5yr avg) · Stable · Ozone
Berks, Pennsylvania
Berks County · AQI 46 (5yr avg) · Improving · PM2.5
Centre, Pennsylvania
Centre County · AQI 44 (5yr avg) · Improving · PM2.5
Washington, Pennsylvania
Washington County · AQI 50 (5yr avg) · Improving · PM2.5
Cambria, Pennsylvania
Cambria County · AQI 48 (5yr avg) · Improving · PM2.5
Franklin, Pennsylvania
Franklin County · AQI 36 (5yr avg) · Worsening · Ozone
York, Pennsylvania
York County · AQI 47 (5yr avg) · Improving · PM2.5
Delaware, Pennsylvania
Delaware County · AQI 51 (5yr avg) · Improving · PM2.5
Dauphin, Pennsylvania
Dauphin County · AQI 48 (5yr avg) · Improving · PM2.5
Montgomery, Pennsylvania
Montgomery County · AQI 44 (5yr avg) · Stable · PM2.5
Adams, Pennsylvania
Adams County · AQI 46 (5yr avg) · Stable · Ozone
Fayette, Pennsylvania
Fayette County · AQI 43 (5yr avg) · Worsening · PM2.5
Greene, Pennsylvania
Greene County · AQI 41 (5yr avg) · Worsening · Ozone
Indiana, Pennsylvania
Indiana County · AQI 40 (5yr avg) · Worsening · Ozone
Beaver, Pennsylvania
Beaver County · AQI 51 (5yr avg) · Stable · PM2.5
Bradford, Pennsylvania
Bradford County · AQI 40 (5yr avg) · Worsening · Ozone
Lycoming, Pennsylvania
Lycoming County · AQI 40 (5yr avg) · Worsening · Ozone
Philadelphia, Pennsylvania
Philadelphia County · AQI 52 (5yr avg) · Improving · PM2.5
Lehigh, Pennsylvania
Lehigh County · AQI 43 (5yr avg) · Worsening · PM2.5
Lancaster, Pennsylvania
Lancaster County · AQI 55 (5yr avg) · Stable · PM2.5
Allegheny, Pennsylvania
Allegheny County · AQI 56 (5yr avg) · Stable · PM2.5
Frequently Asked Questions
Pennsylvania has 40 monitored areas with an average 5-year AQI of 43 and an average Air Quality Grade of B. 29 cities are improving, 9 are worsening, and 2 are stable.
Wyoming, Pennsylvania has the best Air Quality Grade (A) in Pennsylvania with a 5-year average AQI of 33.
Of 40 monitored areas in Pennsylvania, 29 are showing improving trends, 9 are worsening, and 2 remain stable over the past decade.