Air Quality in Maine
10-year air quality trends for 10 monitored areas in Maine.
See full Maine air quality rankings →All Monitored Areas in Maine
Androscoggin, Maine
Androscoggin County · AQI 34 (5yr avg) · Improving · PM2.5
Aroostook, Maine
Aroostook County · AQI 36 (5yr avg) · Improving · PM2.5
Penobscot, Maine
Penobscot County · AQI 33 (5yr avg) · Improving · PM2.5
Knox, Maine
Knox County · AQI 34 (5yr avg) · Stable · Ozone
York, Maine
York County · AQI 37 (5yr avg) · Improving · Ozone
Cumberland, Maine
Cumberland County · AQI 40 (5yr avg) · Improving · PM2.5
Hancock, Maine
Hancock County · AQI 37 (5yr avg) · Stable · Ozone
Kennebec, Maine
Kennebec County · AQI 33 (5yr avg) · Worsening · Ozone
Oxford, Maine
Oxford County · AQI 35 (5yr avg) · Stable · PM2.5
Washington, Maine
Washington County · AQI 34 (5yr avg) · Stable · Ozone
Frequently Asked Questions
Maine has 10 monitored areas with an average 5-year AQI of 35 and an average Air Quality Grade of B. 6 cities are improving, 2 are worsening, and 2 are stable.
Androscoggin, Maine has the best Air Quality Grade (B) in Maine with a 5-year average AQI of 34.
Of 10 monitored areas in Maine, 6 are showing improving trends, 2 are worsening, and 2 remain stable over the past decade.