Technology Transfer Network / NAAQS
Ozone Implementation
Classified Ozone Nonattainment Areas Which Were Revoked Without Maintenance Plans
Note: EPA no longer updates this information, but it may be useful as a reference or resource.
No. Counties Located Year
Design Average NAA Population in a of
Value Expected Previous Before 1990 EPA CMSA SIP
Areas Listed Alphabetically (ppm) Exceedance Yr Classification Nov 90 New Total (1000) Region State MSA Call
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Albany-Schenectady-Troy, NY 0.128 2.7 1989 Marginal 0 6 6 874 2 NY msa 1989
Allentown-Bethlehem-Easton, PA-NJ 0.137 3.1 1989 Marginal 4 0 4 687 3 2 PA-NJ msa 1988
Altoona, PA 0.129 2.0 1989 Marginal 0 1 1 131 3 PA msa 1989
Atlantic City, NJ 0.145 4.0 1989 Moderate 2 0 2 319 2 NJ msa 1988
Boston-Lawrence-Worcester (E. MA), MA-NH 0.165 10.0 1989 Serious 12 0 12 5505 1 MA-NH cmsa 1988
Buffalo-Niagara Falls, NY 0.131 3.8 1989 Marginal 0 2 2 1189 2 NY cmsa 1989
Door Co, WI 0.126 1.8 1990 Marginal RT 0 1 1 26 5 WI no no
Erie, PA 0.129 3.0 1989 Marginal 1 0 1 276 3 PA msa 1989
Essex Co, NY 0.127 1.8 1989 Marginal RT 0 1 1 0 2 NY no 1989
Harrisburg-Lebanon-Carlisle, PA 0.136 2.2 1989 Marginal 4 0 4 588 3 PA msa 1989
Jefferson Co, NY 0.143 3.4 1989 Marginal* 0 1 1 111 2 NY no 1988
Johnstown, PA 0.133 2.5 1989 Marginal 0 2 2 241 3 PA msa 1989
Knox & Lincoln Co.s, ME 0.158 11.1 1989 Moderate* 2 0 2 67 1 ME no 1988
Lewiston-Auburn, ME 0.137 1.5 1989 Moderate* 2 0 2 221 1 ME msa 1989
Manchester, NH 0.128 1.4 1989 Marginal 3 0 3 323 1 NH msa 1989
Muskegon, MI 0.181 9.4 1989 Moderate 1 0 1 159 5 MI msa 1988
Portland, ME 0.156 6.1 1989 Moderate 3 0 3 441 1 ME msa 1988
Portsmouth-Dover-Rochester, NH 0.165 5.3 1989 Serious 2 0 2 183 1 NH msa 1988
Poughkeepsie, NY 0.134 1.3 1989 Moderate-b 1 2 3 552 2 NY msa 1989
Providence (All RI), RI 0.162 6.4 1989 Serious 5 0 5 1003 1 RI cmsa 1988
Reno, NV 0.131 2.0 1990 Marginal 0 1 1 255 9 NV msa no
Scranton-Wilkes-Barre, PA 0.129 3.0 1989 Marginal 5 0 5 734 3 PA msa 1989
Smyth Co, VA (White Top Mtn) 0.125 1.9 1989 Marginal RT 0 1 1 0 3 VA no no
Sussex Co, DE 0.130 3.6 1989 Marginal 0 1 1 113 3 DE no 1989
York, PA 0.129 1.5 1989 Marginal 2 0 2 418 3 PA msa 1989
Youngstown-Warren-Sharon, PA portion 0.134 2.1 1989 Marginal 0 1 1 121 3 PA msa 1989
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26 Total Areas 49 17 66 14,537
b = Bump-up - Classification change to a higher classification; Yr = Data from 1987-89 or 1988-90; RT = Rural
Transport; * 5% Classification Change in 1991; No. Counties Before '90 = Prior designation retained by operation of
law; Sip Call = EPA called for a new State Implementation Plan. Totals were adjusted to account for multiple
nonattainment areas in a single county. No. counties nonattainment before 1990 is a count of those counties that were
nonattainment before the 1990 Clean Air Act. "New" is a count of counties designated nonattainment in 1991 but were
attainment before 1990. The 1-hour standard has been revoked for all these counties. The classification represents the
classification at the time the area was designated Nonattainment.