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

Data is current as of August 31, 2024

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The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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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WISCONSIN
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 20 21 22 23 24
Dane Co Sulfur Dioxide (1971) P
Door Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W
Door Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W
Door Co 8-Hour Ozone (2015) P P P
Kenosha Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Kenosha Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W
Kenosha Co 8-Hour Ozone (2008) P P P P P P P P P P
Kenosha Co 8-Hour Ozone (2015) P P P P P P P
Kewaunee Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Kewaunee Co 8-Hour Ozone (1997)-NAAQS revoked W W W W
Manitowoc Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W
Manitowoc Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W
Manitowoc Co 8-Hour Ozone (2015) P P P P
Marathon Co Sulfur Dioxide (1971) P P P P P P P P P P
Milwaukee Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Milwaukee Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W
Milwaukee Co 8-Hour Ozone (2015) W W W W W W W
Milwaukee Co PM-2.5 (2006) W W W W W
Milwaukee Co Sulfur Dioxide (1971) P
Oneida Co Sulfur Dioxide (1971) P P P P P P P P P
Oneida Co Sulfur Dioxide (2010) P P P P P P P P P
Ozaukee Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Ozaukee Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W
Ozaukee Co 8-Hour Ozone (2015) W W W W W W W
Racine Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Racine Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W
Racine Co PM-2.5 (2006) W W W W W
Racine County 8-Hour Ozone (2015) P P P P P P P
Sheboygan Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Sheboygan Co 8-Hour Ozone (1997)-NAAQS revoked P P P P P P P P P P P P
Sheboygan Co 8-Hour Ozone (2008) P
Sheboygan Co 8-Hour Ozone (2015) P P P P P P P
Walworth Co 1-Hour Ozone (1979)-NAAQS revoked W W W W
Washington Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Washington Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W
Washington County 8-Hour Ozone (2015) P P P P P P P
Waukesha Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Waukesha Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W
Waukesha Co PM-2.5 (2006) W W W W W
Waukesha County 8-Hour Ozone (2015) P P P P P P P
Important Notes

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