Massachusetts
Take Action
High Ozone Days Particle Pollution Groups At Risk  
County
Grade
Wgt.
Avg.
Orange
Days
Red
Days
Purple
Days
Barnstable F 4.7 11 2 0
Berkshire D 2.3 7 0 0
Bristol D 2.2 5 1 0
Dukes D 3.2 5 3 0
Essex F 3.3 10 0 0
Hampden F 4.8 13 1 0
Hampshire F 5.2 14 1 0
Middlesex C 1.3 4 0 0
Norfolk D 2.7 8 0 0
Plymouth - - - - -
Suffolk C 2.0 6 0 0
Worcester D 2.3 7 0 0
Donate
American Lung Association State of the Air: 2008 NOTES

(1) * indicates incomplete monitoring data for all three years. Therefore, those counties are excluded from the grade analysis.
(2) A dash (-) indicates that there is no monitor collecting data in the county.

More about Methodology.