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

As of February 13, 2017
The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.
Listed by State, County, NAAQS (W=Whole County,P=Partial County designated nonattainment as of report date)

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Important Notes
DELAWARE
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
Kent Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Kent Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
New Castle Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
New Castle Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
New Castle Co 8-Hour Ozone (2008) W W W W W W
New Castle Co PM-2.5 (1997) W W W W W W W W W
New Castle Co PM-2.5 (2006) W W W W W
Sussex Co 1-Hour Ozone (1979)-NAAQS revoked W W W W W W W W W W W W W
Sussex Co 8-Hour Ozone (1997)-NAAQS revoked W W W W W W W W W W W W
Sussex Co 8-Hour Ozone (2008) W W W W W W
Important Notes

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