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Ohio Whole or Part County Nonattainment Status by Year Since 1992 for all Criteria Pollutants

Data is current as of April 30, 2019

Listed by State, County, NAAQS (W=Whole County,P=Partial County designated nonattainment as of report date)
The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.

The 1997 Primary Annual PM-2.5 NAAQS (level of 15 µg/m3) is revoked in attainment and maintenance areas for that NAAQS. For additional information see the PM-2.5 NAAQS SIP Requirements Final Rule, effective October 24, 2016. (81 FR 58009)

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Important Notes
OHIO
County NAAQS 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19
Adams Co PM-2.5 (1997) P P P P P P P
Allen Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Ashtabula Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Ashtabula Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Ashtabula Co 8-Hour Ozone (2008) W W W W W
Ashtabula Co PM-2.5 (1997) P P P P P P P P
Belmont Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Belmont Co PM-2.5 (1997) W W W W W W W W
Butler Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Butler Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W
Butler Co 8-Hour Ozone (2008) W W W W
Butler Co PM-2.5 (1997) W W W W W W W W W W W W
Butler County 8-Hour Ozone (2015) W W
Clark Co 1-Hour Ozone (1979)-NAAQS revoked W W W
Clark Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Clark Co PM-2.5 (1997) W W W W W W W W
Clermont Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Clermont Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W
Clermont Co 8-Hour Ozone (2008) W W W W
Clermont Co PM-2.5 (1997) W W W W W W W W W W W W
Clermont Co Sulfur Dioxide (2010) P P P
Clermont County 8-Hour Ozone (2015) W W
Clinton Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Clinton Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W
Clinton Co 8-Hour Ozone (2008) W W W W
Columbiana Co 1-Hour Ozone (1979)-NAAQS revoked W W W
Columbiana Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Coshocton Co PM-2.5 (1997) P P P P P P P P
Coshocton Co Sulfur Dioxide (1971) P P P P P P P P
Cuyahoga Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Cuyahoga Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Cuyahoga Co 8-Hour Ozone (2008) W W W W W
Cuyahoga Co Carbon Monoxide (1971) W W
Cuyahoga Co Lead (2008) P P P P P P P
Cuyahoga Co PM-10 (1987) W W W W W W W W W
Cuyahoga Co PM-2.5 (1997) W W W W W W W W
Cuyahoga Co PM-2.5 (2006) W W W W
Cuyahoga Co PM-2.5 (2012) W W W W
Cuyahoga Co Sulfur Dioxide (1971) P P P P P P P P P P P P P
Cuyahoga County 8-Hour Ozone (2015) W W
Delaware Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Delaware Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Delaware Co 8-Hour Ozone (2008) W W W W
Delaware Co PM-2.5 (1997) W W W W W W W W
Delaware County 8-Hour Ozone (2015) W W
Fairfield Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Fairfield Co 8-Hour Ozone (2008) W W W W
Fairfield Co PM-2.5 (1997) W W W W W W W W
Fairfield County 8-Hour Ozone (2015) W W
Franklin Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Franklin Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Franklin Co 8-Hour Ozone (2008) W W W W
Franklin Co PM-2.5 (1997) W W W W W W W W
Franklin County 8-Hour Ozone (2015) W W
Fulton Co Lead (2008) P P P P P P P P
Gallia Co PM-2.5 (1997) P P P P P P P
Gallia Co Sulfur Dioxide (1971) P P P P P P P P
Geauga Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Geauga Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Geauga Co 8-Hour Ozone (2008) W W W W W
Geauga County 8-Hour Ozone (2015) W W
Greene Co 1-Hour Ozone (1979)-NAAQS revoked W W W
Greene Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Greene Co PM-2.5 (1997) W W W W W W W W
Hamilton Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Hamilton Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W
Hamilton Co 8-Hour Ozone (2008) W W W W
Hamilton Co PM-2.5 (1997) W W W W W W W W W W W W
Hamilton County 8-Hour Ozone (2015) W W
Jefferson Co 1-Hour Ozone (1979)-NAAQS revoked W W W
Jefferson Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Jefferson Co PM-10 (1987) P P P P P P P P P
Jefferson Co PM-2.5 (1997) W W W W W W W W
Jefferson Co PM-2.5 (2006) W W W W
Jefferson Co Sulfur Dioxide (1971) P P P P P P P
Jefferson Co Sulfur Dioxide (2010) P P P P P P P
Knox Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Knox Co 8-Hour Ozone (2008) W W W W
Lake Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Lake Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Lake Co 8-Hour Ozone (2008) W W W W W
Lake Co PM-2.5 (1997) W W W W W W W W
Lake Co PM-2.5 (2006) W W W W
Lake Co Sulfur Dioxide (1971) P P P P P P P
Lake Co Sulfur Dioxide (2010) W W W W W W W
Lake County 8-Hour Ozone (2015) W W
Lawrence Co PM-2.5 (1997) W W W W W W W
Licking Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Licking Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Licking Co 8-Hour Ozone (2008) W W W W
Licking Co PM-2.5 (1997) W W W W W W W W
Licking County 8-Hour Ozone (2015) W W
Logan Co Lead (2008) P P P P
Lorain Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Lorain Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Lorain Co 8-Hour Ozone (2008) W W W W W
Lorain Co PM-2.5 (1997) W W W W W W W W
Lorain Co PM-2.5 (2006) W W W W
Lorain Co PM-2.5 (2012) W W W W
Lorain Co Sulfur Dioxide (1971) P P P P P P P P
Lorain County 8-Hour Ozone (2015) W W
Lucas Co 1-Hour Ozone (1979)-NAAQS revoked W W W
Lucas Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Lucas Co Sulfur Dioxide (1971) P P P P P P P P P P P P
Madison Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Madison Co 8-Hour Ozone (2008) W W W W
Mahoning Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Mahoning Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Medina Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Medina Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Medina Co 8-Hour Ozone (2008) W W W W W
Medina Co PM-2.5 (1997) W W W W W W W W
Medina Co PM-2.5 (2006) W W W W
Medina County 8-Hour Ozone (2015) W W
Miami Co 1-Hour Ozone (1979)-NAAQS revoked W W W
Miami Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Montgomery Co 1-Hour Ozone (1979)-NAAQS revoked W W W
Montgomery Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Montgomery Co PM-2.5 (1997) W W W W W W W W
Morgan Co Sulfur Dioxide (1971) P P
Morgan Co Sulfur Dioxide (2010) P P P P P P P
Portage Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Portage Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Portage Co 8-Hour Ozone (2008) W W W W W
Portage Co PM-2.5 (1997) W W W W W W W W
Portage Co PM-2.5 (2006) W W W W
Portage County 8-Hour Ozone (2015) W W
Preble Co 1-Hour Ozone (1979)-NAAQS revoked W W W
Scioto Co PM-2.5 (1997) W W W W W W W
Stark Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Stark Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Stark Co PM-2.5 (1997) W W W W W W W W
Stark Co PM-2.5 (2006) W W W W
Summit Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Summit Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W
Summit Co 8-Hour Ozone (2008) W W W W W
Summit Co PM-2.5 (1997) W W W W W W W W
Summit Co PM-2.5 (2006) W W W W
Summit County 8-Hour Ozone (2015) W W
Trumbull Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Trumbull Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Warren Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Warren Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W
Warren Co 8-Hour Ozone (2008) W W W W
Warren Co PM-2.5 (1997) W W W W W W W W W W W W
Warren County 8-Hour Ozone (2015) W W
Washington Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Washington Co PM-2.5 (1997) W W W W W W W W
Washington Co Sulfur Dioxide (1971) P P
Washington Co Sulfur Dioxide (2010) P P P P P P P
Wood Co 1-Hour Ozone (1979)-NAAQS revoked W W W
Wood Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Important Notes

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