Washington
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High Ozone Days Particle Pollution Groups At Risk  
County
Grade
Wgt.
Avg.
Orange
Days
Red
Days
Purple
Days
Benton - - - - -
Chelan - - - - -
Clallam A 0.0 0 0 0
Clark A 0.0 0 0 0
Grant - - - - -
Grays Harbor - - - - -
King C 2.0 3 2 0
Klickitat A 0.0 0 0 0
Lewis * * * * *
Mason * * * * *
Okanogan - - - - -
Pierce C 1.2 2 1 0
Skagit A 0.0 0 0 0
Snohomish - - - - -
Spokane A 0.0 0 0 0
Thurston A 0.0 0 0 0
Whatcom A 0.0 0 0 0
Yakima - - - - -
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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.