Oregon
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High Ozone Days Particle Pollution Groups At Risk  
County
Grade
Wgt.
Avg.
Orange
Days
Red
Days
Purple
Days
Clackamas B 0.5 0 1 0
Columbia A 0.0 0 0 0
Deschutes - - - - -
Douglas - - - - -
Jackson A 0.0 0 0 0
Josephine - - - - -
Klamath - - - - -
Lane A 0.0 0 0 0
Linn - - - - -
Marion B 0.3 1 0 0
Multnomah A 0.0 0 0 0
Umatilla - - - - -
Union - - - - -
Wasco - - - - -
Washington - - - - -
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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.