New Hampshire
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High Ozone Days Particle Pollution Groups At Risk  
County
Grade
Wgt.
Avg.
Orange
Days
Red
Days
Purple
Days
Belknap A 0.0 0 0 0
Cheshire A 0.0 0 0 0
Coos C 1.0 3 0 0
Grafton A 0.0 0 0 0
Hillsborough D 3.0 9 0 0
Merrimack B 0.3 1 0 0
Rockingham B 0.3 1 0 0
Sullivan B 0.3 1 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.