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Areas with a Maintenance Plan Requirement Under
Section 110(a)(1) of the CAA

As of June 15, 2005

Areas Listed Alphabetically Classification No. of
Counties
NAA
2000
Pop.
EPA
Region
State
Boston-Lawrence-Worcester (E. MA), MA-NH Serious 1 5,777 1 MA-NH
Cherokee Co, SC Marginal 1 52,537 4 SC
East Kern Co, CA Serious 1 12,174 9 CA
Edmonson Co, KY Marginal RT 1 11,644 4 KY
El Paso, TX Serious 1 679,622 6 TX
Greenbrier Co, WV Marginal 1 34,453 4 WV
Greensboro-Winston Salem-High Point, NC Moderate 4 874,362 4 NC
Hancock & Waldo Cos, ME Marginal 2 57,662 1 ME
Huntington-Ashland, WV-KY Moderate* 1 17,125 4 WV-KY
Johnstown, PA Marginal 1 80,023 3 PA
Kansas City, MO-KS Other 5 1,521,635 7 MO-KS
Knox & Lincoln Co.s, ME Moderate* 2 11,167 1 ME
Lake Charles, LA Marginal 1 183,577 7 LA
Lewiston-Auburn, ME Moderate* 1 217,517 1 ME
Lexington-Fayette, KY Marginal 2 293,573 4 KY
Manchester, NH Marginal 3 179,952 1 NH
Miami-Fort Lauderdale-W. Palm Beach, FL Moderate 3 5,007,564 4 FL
Monterey Bay, CA Moderate 3 710,598 9 CA
Nashville, TN Moderate 5 1,097,810 4 TN
Owensboro, KY Marginal 2 92,389 4 KY
Paducah, KY Marginal 1 31,404 4 KY
Pointe Coupee Parish, LA Marginal 1 22,763 6 LA
Portland, ME Moderate 2 34,450 1 ME
Portland-Vancouver AQMA, OR-WA Marginal 4 1,437,910 10 OR-WA
Portsmouth-Dover-Rochester, NH Serious 1 30,099 1 NH
Reno, NV Marginal 1 339,486 9 NV
Salt Lake City, UT Moderate 2 1,137,381 8 UT
San Diego, CA Serious 1 402 8 UT
Santa Barbara-Santa Maria-Lompoc, CA Serious 1 399,347 8 UT
Scranton-Wilkes-Barre, PA Marginal 1 64,151 3 PA
Seattle-Tacoma, WA Marginal 3 3,043,878 10 WA
Smyth Co, VA (White Top Mtn) Marginal RT 1 0 3 VA
Sunland Park, NM (New Area 1995) Marginal 1 10,306 6 NM
Tampa-St. Petersburg-Clearwater, FL Marginal 2 1,920,430 4 FL
Walworth Co, WI Marginal 1 93,759 5 WI
 
33 Total Areas 56 17,734,755  
 

County totals were adjusted to account for multiple areas in a single county. RT = Rural Transport; * 5% Classification Change; Sip Call = EPA called for a new State Implementation Plan The former 1-hour ozone designations and classifications as of June 15, 2004, are being retained in subpart C of Part 81 for purposes of the anti backsliding provisions of 40 CFR 51.905. 40 CFR 51.905(c) references subpart C of part 81 for the areas affected by the anti-backsliding regulation.


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