Michigan
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High Ozone Days Particle Pollution Groups At Risk  
County
Grade
Wgt.
Avg.
Orange
Days
Red
Days
Purple
Days
Allegan F 5.8 13 3 0
Bay - - - - -
Benzie D 2.3 7 0 0
Berrien D 2.3 7 0 0
Cass C 1.7 5 0 0
Chippewa - - - - -
Clinton A 0.0 0 0 0
Dickinson - - - - -
Genesee B 0.7 2 0 0
Huron C 1.0 3 0 0
Ingham C 1.0 3 0 0
Iron - - - - -
Kalamazoo B 0.7 2 0 0
Kent C 1.7 5 0 0
Leelanau C 1.0 3 0 0
Lenawee C 1.0 3 0 0
Macomb F 3.3 10 0 0
Manistee * * * * *
Mason C 2.0 6 0 0
Missaukee B 0.7 2 0 0
Monroe - - - - -
Muskegon F 5.2 14 1 0
Oakland A 0.0 0 0 0
Ottawa D 2.8 7 1 0
Saginaw - - - - -
Schoolcraft C 2.0 6 0 0
St Clair D 2.2 5 1 0
Washtenaw B 0.7 2 0 0
Wayne C 1.0 3 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.