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Green Book Nonattainment Areas

Carbon Monoxide (1971) Maintenance Area (Redesignated from Nonattainment) Summary

As of June 17, 2016
Classification Number of Areas Number of Counties 2010 Population
Serious 7 16 23,548,401
Moderate > 12.7ppm 4 19 18,345,975
Moderate <= 12.7ppm 32 64 25,770,701
 
SUBTOTAL 43 97 67,665,077
 
Not Classified 34 40 8,145,840
 
SUBTOTAL 34 40 8,145,840
 
GRAND TOTAL 77 131 75,810,917

County subtotals and grand totals may not equal sum of parts. Part counties are only counted one time within groupings. Multi-state nonattainment areas are not considered maintenance areas until all states in the area have been redesignated


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