Utah
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High Ozone Days Particle Pollution Groups At Risk  
County
Grade
Wgt.
Avg.
Orange
Days
Red
Days
Purple
Days
Box Elder B 0.7 2 0 0
Cache A 0.0 0 0 0
Davis F 3.5 9 1 0
Salt Lake F 3.3 10 0 0
San Juan A 0.0 0 0 0
Tooele * * * * *
Utah C 1.2 2 1 0
Washington D 2.8 3 1 2
Weber C 1.7 5 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.