Missouri
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High Ozone Days Particle Pollution Groups At Risk  
County
Grade
Wgt.
Avg.
Orange
Days
Red
Days
Purple
Days
Boone - - - - -
Buchanan - - - - -
Cass C 1.0 3 0 0
Cedar B 0.3 1 0 0
Clay F 7.8 22 1 0
Clinton D 2.7 8 0 0
Greene B 0.3 1 0 0
Jackson - - - - -
Jasper - - - - -
Jefferson C 2.0 6 0 0
Lincoln * * * * *
Maries - - - - -
Mercer - - - - -
Monroe B 0.3 1 0 0
Perry C 1.3 4 0 0
Platte * * * * *
St Charles F 8.7 26 0 0
St Louis F 6.5 18 1 0
St Louis City F 3.3 10 0 0
Ste Genevieve C 1.0 3 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.