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8-Hour Ozone (2015) Maintenance Area (Redesignated from Nonattainment) Area/State/County Report

Data is current as of June 30, 2026


  Atlanta, GA (Marginal - Maintenance)
GEORGIA (Region IV)
Bartow County
Clayton County
Cobb County
DeKalb County
Fulton County
Gwinnett County
Henry County
 
  Cincinnati, OH-KY (Moderate - Maintenance)
KENTUCKY (Region IV)
Boone County (P)
Campbell County (P)
Kenton County (P)
OHIO (Region V)
Butler County
Clermont County
Hamilton County
Warren County
 
  Cleveland, OH (Serious - Maintenance)
OHIO (Region V)
Cuyahoga County
Geauga County
Lake County
Lorain County
Medina County
Portage County
Summit County
 
  Columbus, OH (Marginal - Maintenance)
OHIO (Region V)
Delaware County
Fairfield County
Franklin County
Licking County
 
  Door County, WI (Marginal (Rural Transport) - Maintenance)
WISCONSIN (Region V)
Door County (P)

Newport State Park Boundary

 
  Door County-Revised, WI (Marginal (Rural Transport) - Maintenance)
WISCONSIN (Region V)
Door County (P)
The portion of Door County north of Sturgeon Bay Canal excluding Newport State Park
 
  Louisville, KY-IN (Marginal - Maintenance)
INDIANA (Region V)
Clark County
Floyd County
 
  Manitowoc County, WI (Marginal - Maintenance)
WISCONSIN (Region V)
Manitowoc County (P)
 
  Yuma, AZ (Marginal - Maintenance)
ARIZONA (Region IX)
Yuma County (P)


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