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

Data is current as of June 20, 2017

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The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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
MARYLAND
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
Anne Arundel Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Anne Arundel Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Anne Arundel Co 8-Hour Ozone (2008) W W W W W W
Anne Arundel Co PM-2.5 (1997) W W W W W W W W W
Anne Arundel Co Sulfur Dioxide (2010) P P
Baltimore (City) 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Baltimore (City) 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Baltimore (City) 8-Hour Ozone (2008) W W W W W W
Baltimore (City) Carbon Monoxide (1971) P P P
Baltimore (City) PM-2.5 (1997) W W W W W W W W W
Baltimore Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Baltimore Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Baltimore Co 8-Hour Ozone (2008) W W W W W W
Baltimore Co PM-2.5 (1997) W W W W W W W W W
Baltimore Co Sulfur Dioxide (2010) P P
Calvert Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Calvert Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Calvert Co 8-Hour Ozone (2008) W W W W W W
Carroll Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Carroll Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Carroll Co 8-Hour Ozone (2008) W W W W W W
Carroll Co PM-2.5 (1997) W W W W W W W W W
Cecil Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Cecil Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Cecil Co 8-Hour Ozone (2008) W W W W W W
Charles Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Charles Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Charles Co 8-Hour Ozone (2008) W W W W W W
Charles Co PM-2.5 (1997) W W W W W W W W W
Frederick Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Frederick Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Frederick Co 8-Hour Ozone (2008) W W W W W W
Frederick Co PM-2.5 (1997) W W W W W W W W W
Harford Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Harford Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Harford Co 8-Hour Ozone (2008) W W W W W W
Harford Co PM-2.5 (1997) W W W W W W W W W
Howard Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Howard Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Howard Co 8-Hour Ozone (2008) W W W W W W
Howard Co PM-2.5 (1997) W W W W W W W W W
Kent Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W
Kent Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Montgomery Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Montgomery Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Montgomery Co 8-Hour Ozone (2008) W W W W W W
Montgomery Co Carbon Monoxide (1971) P P P P
Montgomery Co PM-2.5 (1997) W W W W W W W W W
Prince George's Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Prince George's Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Prince George's Co 8-Hour Ozone (2008) W W W W W W
Prince George's Co Carbon Monoxide (1971) P P P P
Prince George's Co PM-2.5 (1997) W W W W W W W W W
Queen Annes Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W
Queen Annes Co 8-Hour Ozone (1997)-NAAQS revoked W W W
Washington Co PM-2.5 (1997) W W W W W W W W W
Important Notes

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