Oklahoma
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High Ozone Days Particle Pollution Groups At Risk  
County
Grade
Wgt.
Avg.
Orange
Days
Red
Days
Purple
Days
Adair B 0.3 1 0 0
Caddo - - - - -
Canadian C 1.3 4 0 0
Carter * * * * *
Cherokee B 0.7 2 0 0
Cleveland A 0.0 0 0 0
Comanche C 1.3 4 0 0
Cotton * * * * *
Creek C 2.0 6 0 0
Dewey B 0.3 1 0 0
Garfield - - - - -
Jefferson * * * * *
Johnston * * * * *
Kay C 2.0 6 0 0
Lincoln * * * * *
Love * * * * *
Mayes C 1.0 3 0 0
Mc Clain B 0.3 1 0 0
Muskogee - - - - -
Oklahoma F 4.3 13 0 0
Ottawa C 1.0 3 0 0
Pittsburg A 0.0 0 0 0
Seminole - - - - -
Sequoyah * * * * *
Tulsa F 4.3 10 2 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.