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

Data is current as of January 31, 2025

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The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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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MISSOURI
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 25
Dent Co Lead (2008) P P P P P P P P P P P P P P P P
Franklin Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W
Franklin Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W
Franklin Co 8-Hour Ozone (2008) W W W W W W
Franklin Co 8-Hour Ozone (2015) P P P P P P P P
Franklin Co PM-2.5 (1997) W W W W W W W W W W W W W
Iron Co Lead (1978) P P P P P P P P P P P P
Iron Co Lead (2008) P P P P P P P P P P P P P P P P
Jackson Co Sulfur Dioxide (2010) P P P P P P P P P
Jefferson Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W
Jefferson Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W
Jefferson Co 8-Hour Ozone (2008) W W W W W W
Jefferson Co Lead (1978) P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P
Jefferson Co Lead (2008) P P P P P P P P P P P P P P P P
Jefferson Co PM-2.5 (1997) W W W W W W W W W W W W W
Jefferson Co Sulfur Dioxide (2010) P P P P P P P P P
Jefferson County 8-Hour Ozone (2015) W W W W W W W W
New Madrid Co Sulfur Dioxide (2010) P P P P P
Reynolds Co Lead (2008) P P P P P P P P P P P P P P P P
St Charles Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W
St Charles Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W
St Charles Co 8-Hour Ozone (2008) W W W W W W
St Charles Co PM-2.5 (1997) W W W W W W W W W W W W W
St Louis 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W
St Louis 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W
St Louis 8-Hour Ozone (2008) W W W W W W
St Louis Carbon Monoxide (1971) W W W W W W W
St Louis PM-2.5 (1997) W W W W W W W W W W W W W
St Louis Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W
St Louis Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W
St Louis Co 8-Hour Ozone (2008) W W W W W W
St Louis Co Carbon Monoxide (1971) P P P P P P P
St Louis Co PM-2.5 (1997) W W W W W W W W W W W W W
St. Charles Co 8-Hour Ozone (2015) W W W W W W W W
St. Louis Co 8-Hour Ozone (2015) W W W W W W W W
St. Louis city 8-Hour Ozone (2015) W W W W W W W W
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