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Pennsylvania Air Quality

Current AQI at 55 monitors, highest 88 (Moderate) · Measured 10/26/2026, 7:00 PM PT

Monitors
55
Highest AQI
88
Moderate
Typical (median)
51
Moderate
Above 100
0

Monitoring sites in Pennsylvania

Worst first. Times are local.

  • 88Lancaster DWModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 86Liberty (SAHS)Moderate · Fine particles (PM2.5) · Mon 10/26/2026, 9:00 PM EDT
  • 68ChesterModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 68LABPModerate · Fine particles (PM2.5) · Mon 10/26/2026, 9:00 PM EDT
  • 67Kane Exp. ForestModerate · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 66NEWModerate · Fine particles (PM2.5) · Mon 10/26/2026, 9:00 PM EDT
  • 64LancasterModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 61South FayetteModerate · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 59JohnstownModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 59New GardenModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 58YorkModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 56LawrencevilleModerate · Fine particles (PM2.5) · Mon 10/26/2026, 9:00 PM EDT
  • 56Marcus HookModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 56RITModerate · Fine particles (PM2.5) · Mon 10/26/2026, 9:00 PM EDT
  • 56Tioga CountyModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 55Beaver FallsModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 55KittanningModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 55TORModerate · Fine particles (PM2.5) · Mon 10/26/2026, 9:00 PM EDT
  • 54FABModerate · Fine particles (PM2.5) · Mon 10/26/2026, 9:00 PM EDT
  • 54TowandaModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 53CarlisleModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 53FarrellModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 53GreensburgModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 53ScrantonModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 52FreemansburgModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 51HarrisburgModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 51Harrison TownshipModerate · Fine particles (PM2.5) · Mon 10/26/2026, 9:00 PM EDT
  • 51SwiftwaterModerate · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 50Brighton TownshipGood · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 50M.K. GoddardGood · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 50Reading AirportGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 48AllentownGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 45Methodist HillGood · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 44ArendtsvilleGood · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 44NorristownGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 42FlorenceGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 42MONGood · Fine particles (PM2.5) · Mon 10/26/2026, 9:00 PM EDT
  • 42Parkway East (Near Road)Good · Fine particles (PM2.5) · Mon 10/26/2026, 9:00 PM EDT
  • 42State CollegeGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 42York DWGood · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 41MoshannonGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 39CharleroiGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 39HoustonGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 38Penn StateGood · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 38StrongstownGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 33AltoonaGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 31ArendtsvilleGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 31ErieGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 31Laurel HillGood · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 31NEAGood · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 26HolbrookGood · Fine particles (PM2.5) · Mon 10/26/2026, 10:00 PM EDT
  • 24BristolGood · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 21KutztownGood · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 20MontoursvilleGood · Ozone · Mon 10/26/2026, 9:00 PM EDT
  • 11PeckvilleGood · Ozone · Mon 10/26/2026, 9:00 PM EDT

By county

Highest current AQI among the county's monitors

What the AQI means

  • 0-50Good. Air quality is satisfactory and poses little or no risk.
  • 51-100Moderate. Acceptable. A few unusually sensitive people may have symptoms.
  • 101-150Unhealthy for Sensitive Groups. People with heart or lung disease, older adults, children and teens should limit long or heavy outdoor exertion.
  • 151-200Unhealthy. Everyone may begin to feel effects. Sensitive groups should avoid long or heavy outdoor exertion.
  • 201-300Very Unhealthy. Health alert: the risk of health effects is increased for everyone.
  • 301-500Hazardous. Health warning of emergency conditions. Everyone is more likely to be affected.

Frequently asked questions

Where is the air worst in Pennsylvania right now?
Lancaster DW has the highest current reading at AQI 88 (Moderate).
How often are readings updated?
Monitors report every hour. We refresh this page with the latest hour from EPA AirNow.

Source: EPA AirNow · Last updated 10/27/2026 · Data are preliminary and subject to change