North Carolina
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High Ozone Days Particle Pollution Groups At Risk  
County
Grade
Wgt.
Avg.
Orange
Days
Red
Days
Purple
Days
Alamance - - - - -
Alexander A 0.0 0 0 0
Avery A 0.0 0 0 0
Buncombe B 0.3 1 0 0
Cabarrus - - - - -
Caldwell A 0.0 0 0 0
Camden * * * * *
Caswell A 0.0 0 0 0
Catawba - - - - -
Chatham A 0.0 0 0 0
Cumberland D 2.7 8 0 0
Davidson - - - - -
Davie C 1.3 4 0 0
Duplin - - - - -
Durham B 0.3 1 0 0
Edgecombe B 0.3 1 0 0
Forsyth C 1.0 3 0 0
Franklin B 0.3 1 0 0
Gaston - - - - -
Graham C 1.0 3 0 0
Granville C 1.7 5 0 0
Guilford C 1.7 5 0 0
Haywood B 0.3 1 0 0
Jackson B 0.3 1 0 0
Johnston B 0.7 2 0 0
Lenoir B 0.3 1 0 0
Lincoln C 2.0 6 0 0
Martin B 0.3 1 0 0
Mcdowell - - - - -
Mecklenburg F 8.0 21 2 0
Mitchell - - - - -
Montgomery - - - - -
New Hanover A 0.0 0 0 0
Onslow - - - - -
Orange - - - - -
Person B 0.3 1 0 0
Pitt B 0.3 1 0 0
Randolph * * * * *
Robeson - - - - -
Rockingham B 0.3 1 0 0
Rowan F 9.0 27 0 0
Swain A 0.0 0 0 0
Union C 1.0 3 0 0
Wake D 2.3 7 0 0
Watauga - - - - -
Wayne - - - - -
Yancey 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.