Minnesota
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High Ozone Days Particle Pollution Groups At Risk  
County
Grade
Wgt.
Avg.
Orange
Days
Red
Days
Purple
Days
Anoka A 0.0 0 0 0
Becker * * * * *
Carlton A 0.0 0 0 0
Cass - - - - -
Crow Wing A 0.0 0 0 0
Dakota * * * * *
Goodhue A 0.0 0 0 0
Hennepin - - - - -
Lake A 0.0 0 0 0
Lyon * * * * *
Mille Lacs B 0.3 1 0 0
Olmsted A 0.0 0 0 0
Ramsey - - - - -
Scott B 0.3 1 0 0
St Louis A 0.0 0 0 0
Stearns A 0.0 0 0 0
Washington A 0.0 0 0 0
Wright B 0.3 1 0 0
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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.