You are here: EPA Home > Green Book > 8-Hour Ozone (2015) Maintenance Area (Redesignated from Nonattainment) Summary
8-Hour Ozone (2015) Maintenance Area (Redesignated from Nonattainment) SummaryData is current as of March 31, 2021
|Classification||Number of Areas||Number of Counties||2010 Population|
|Marginal (Rural Transport)||1||1||31|
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.