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AirHistory

Air Quality in Massachusetts

10-year air quality trends for 13 monitored areas in Massachusetts.

See full Massachusetts air quality rankings →
13
Cities
41
Avg AQI (5yr)
3
Improving
5
Stable
5
Worsening

All Monitored Areas in Massachusetts

Suffolk, Massachusetts

Suffolk County · AQI 44 (5yr avg) · Improving · PM2.5

B

Berkshire, Massachusetts

Berkshire County · AQI 42 (5yr avg) · Improving · PM2.5

B

Hampshire, Massachusetts

Hampshire County · AQI 39 (5yr avg) · Stable · Ozone

B

Norfolk, Massachusetts

Norfolk County · AQI 37 (5yr avg) · Stable · Ozone

B

Barnstable, Massachusetts

Barnstable County · AQI 36 (5yr avg) · Stable · Ozone

B

Bristol, Massachusetts

Bristol County · AQI 41 (5yr avg) · Stable · Ozone

B

Essex, Massachusetts

Essex County · AQI 41 (5yr avg) · Stable · Ozone

B

Franklin, Massachusetts

Franklin County · AQI 42 (5yr avg) · Stable · PM2.5

C

Plymouth, Massachusetts

Plymouth County · AQI 41 (5yr avg) · Stable · PM2.5

C

Dukes, Massachusetts

Dukes County · AQI 37 (5yr avg) · Worsening · Ozone

C

Worcester, Massachusetts

Worcester County · AQI 43 (5yr avg) · Stable · Ozone

C

Hampden, Massachusetts

Hampden County · AQI 44 (5yr avg) · Stable · PM2.5

C

Middlesex, Massachusetts

Middlesex County · AQI 39 (5yr avg) · Worsening · Ozone

C
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Frequently Asked Questions

Massachusetts has 13 monitored areas with an average 5-year AQI of 41 and an average Air Quality Grade of B. 3 cities are improving, 5 are worsening, and 5 are stable.

Suffolk, Massachusetts has the best Air Quality Grade (B) in Massachusetts with a 5-year average AQI of 44.

Of 13 monitored areas in Massachusetts, 3 are showing improving trends, 5 are worsening, and 5 remain stable over the past decade.

Sources: EPA Air Quality System (AQS)
Last updated: