Regulations last checked for updates: May 16, 2024

Title 40 - Protection of Environment last revised: May 14, 2024
All TitlesTitle 40Chapter IPart 81Subpart C - Subpart C—Section 107 Attainment Status Designations
View all text of Subpart C [§ 81.300 - § 81.356]
§ 81.320 - Maine.

Maine—TSP

Designated areas Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards
AQCR 107 (Central ME):
AugustaX
Lewiston/AuburnX
RocklandX
Remainder of AQCRX
AQCR 109 (Downeast):
LincolnX
Bangor/BrewerX
BaileyvilleX
Remainder of AQCRX
AQCR 108 (Aroostook)X
AQCR 111 (Northwest ME)X
AQCR 110 (Met. Portland)X

Maine—1971 Sulfur Dioxide NAAQS

[Primary and Secondary]

Designated area Does not meet primary standards Does not meet secondary standards Cannot be
classified 		Better than national standard
AQCR 110X
AQCR 107X
AQCR 109X
AQCR 108-MadawaskaX
Rest of regionX
AQCR 111X

Maine—2010 Sulfur Dioxide NAAQS

[Primary]

Designated area 1 Designation
Date 2 Type
Statewide:Attainment/Unclassifiable.
Androscoggin County
Aroostook County
Cumberland County
Franklin County
Hancock County
Kennebec County
Knox County
Lincoln County
Oxford County
Penobscot County
Piscataquis County
Sagadahoc County
Somerset County
Waldo County
Washington County
York County

1 Includes any Indian country in each county or area, unless otherwise specified. EPA is not determining the boundaries of any area of Indian country in this table, including any area of Indian country located in the larger designation area. The inclusion of any Indian country in the designation area is not a determination that the state has regulatory authority under the Clean Air Act for such Indian country.

2 This date is April 9, 2018, unless otherwise noted.

Maine—Carbon Monoxide

Designated area Designation Classification
Date 1 Type Date 1 Type
StatewideUnclassifiable/ Attainment
Androscoggin County
Aroostook County
Cumberland County
Franklin County
Hancock County
Kennebec County
Knox County
Lincoln County
Oxford County
Penobscot County
Piscataquis County
Sagadahoc County
Somerset County
Waldo County
Washington County
York County

1 This date is November 15, 1990, unless otherwise noted.

Maine—Ozone (1-Hour Standard) 4

Designated area Designation Classification
Date 1 Type Date 1 Type
Franklin County Area:
Franklin County (part)Unclassifiable/Attainment
Hancock County and Waldo County Area:
Hancock CountyAttainment
Waldo CountyAttainment
Knox County and Lincoln County Area:
Knox County( 3)Nonattainment( 3)Moderate.
Lincoln County( 3)Nonattainment( 3)Moderate.
Lewiston-Auburn Area:
Androscoggin County( 3)Nonattainment( 3)Moderate.
Kennebec County( 3)Nonattainment( 3)Moderate.
Oxford County Area:
Oxford County (part)Unclassifiable/Attainment
Portland Area:
Cumberland County( 3)Nonattainment( 3)Moderate. 2
Sagadahoc County( 3)Nonattainment( 3)Moderate. 2
York County( 3)Nonattainment( 3)Moderate. 2
Somerset County Area:
Somerset County (part)Unclassifiable/Attainment
AQCR 108 Aroostook IntrastateUnclassifiable/Attainment
Aroostook County (part) see 40 CFR 81.179
AQCR 109 Down East IntrastateUnclassifiable/Attainment
Penobscot County (part), as described under 40 CFR 81.181
Piscataquis County (part) see 40 CFR 81.181
Washington County
AQCR 111 Northwest Maine Intrastate (Remainder of)Unclassifiable/Attainment
see 40 CFR 81.182
Aroostook County
Franklin County (part)
Oxford County (part)
Penobscot County (part)
Piscataquis County (part)
Somerset County (part)

1 This date is October 18, 2000, unless otherwise noted.

2 Attainment date extended to November 15, 1997.

3 This date is January 16, 2001.

4 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Maine. Hancock and Waldo Counties are maintenance areas for the 1-hour NAAQS for purposes of 40 CFR part 51 subpart X.

Maine—PM-10

Designated area Designation Classification
Date Type Date Type
Aroostook County:
City of Presque Isle (part) 18/30/95Attainment
That area bounded by Allen Street from its intersection with Main Street east to Dudley Street, Dudley Street south to Cedar Street, Cedar Street west to Main Street, Main Street south to Kennedy Brook, Kennedy Brook northwest crossing Presque Isle Stream to Coburn Street, Coburn Street northwest to Mechanic Street, Mechanic Street west to Judd Street, Judd Street northeast to State Street, State Street northwest to School Street, School Street northeast to Park Street, Park Street east to Main Street
Rest of State11/15/90Unclassifiable

1 This definition of the nonattainment area redefines its borders from the entire City of Presque Isle to this area of 0.6 square miles which circumscribe the area of high emission densities and ambient PM10 levels. (60 FR 2885, January 12, 1995)

Maine—1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Statewide:
Androscoggin CountyUnclassifiable/Attainment.
Aroostook CountyUnclassifiable/Attainment.
Cumberland CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Kennebec CountyUnclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Oxford CountyUnclassifiable/Attainment.
Penobscot CountyUnclassifiable/Attainment.
Piscataquis CountyUnclassifiable/Attainment.
Sagadahoc CountyUnclassifiable/Attainment.
Somerset CountyUnclassifiable/Attainment.
Waldo CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
York CountyUnclassifiable/Attainment.

a Includes Indian Country located in each county or area, except as otherwise specified.

1 This date is 90 days after January 5, 2005, unless otherwise noted.

Maine—2012 Annual PM2.5 NAAQS

[Primary]

Designated area 1 Designation Classification
Date 2 Type Date 2 Type
Statewide:
Androscoggin CountyUnclassifiable/Attainment
Aroostook CountyUnclassifiable/Attainment
Cumberland CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Kennebec CountyUnclassifiable/Attainment
Knox CountyUnclassifiable/Attainment
Lincoln CountyUnclassifiable/Attainment
Oxford CountyUnclassifiable/Attainment
Penobscot CountyUnclassifiable/Attainment
Piscataquis CountyUnclassifiable/Attainment
Sagadahoc CountyUnclassifiable/Attainment
Somerset CountyUnclassifiable/Attainment
Waldo CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
York CountyUnclassifiable/Attainment

1 Includes areas of Indian country located in each county or area, except as otherwise specified.

2 This date is April 15, 2015, unless otherwise noted.

Maine—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Statewide:
Androscoggin CountyUnclassifiable/Attainment.
Aroostook CountyUnclassifiable/Attainment.
Cumberland CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Kennebec CountyUnclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Oxford CountyUnclassifiable/Attainment.
Penobscot CountyUnclassifiable/Attainment.
Piscataquis CountyUnclassifiable/Attainment.
Sagadahoc CountyUnclassifiable/Attainment.
Somerset CountyUnclassifiable/Attainment.
Waldo CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
York CountyUnclassifiable/Attainment.

a Includes Indian Country located in each county or area, except as otherwise specified.

1 This date is 90 days after January 5, 2005, unless otherwise noted.

Maine—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Statewide:
Androscoggin CountyUnclassifiable/Attainment.
Aroostook CountyUnclassifiable/Attainment.
Cumberland CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Kennebec CountyUnclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Oxford CountyUnclassifiable/Attainment.
Penobscot CountyUnclassifiable/Attainment.
Piscataquis CountyUnclassifiable/Attainment.
Sagadahoc CountyUnclassifiable/Attainment.
Somerset CountyUnclassifiable/Attainment.
Waldo CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
York CountyUnclassifiable/Attainment.

a Includes Indian Country located in each county or area, except as otherwise specified.

1 This date is 30 days after November 13, 2009, unless otherwise noted.

Maine—NO2 (1971 Annual Standard)

Designated area Does not meet primary standards Cannot be classified or better than national standards
AQCR 110X
AQCR 107X
AQCR 109X
AQCR 108X
AQCR 111X

Maine—NO2 (2010 1-Hour Standard)

Designated area Designation a
Date 1 Type
State of MaineUnclassifiable/Attainment.

a Includes Indian Country located in each county or area, except as otherwise specified.

1 This date is 90 days after October 31, 2011, unless otherwise noted.

Maine—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation a Category/classification
Date 1 Type Date 1 Type
Hancock, Knox, Lincoln and Waldo Cos., ME:
Hancock County (part) (includes only the following cities and towns): Bar Harbor, Blue Hill, Brooklin, Brooksville, Cranberry Isle, Deer Isle, Frenchboro, Gouldsboro, Hancock, Lamoine, Mount Desert, Sedgwick, Sorrento, Southwest Harbor, Stonington, Sullivan, Surry, Swans Island, Tremont, Trenton, and Winter HarborJanuary 10, 2007Attainment
Knox County (part) (includes only the following cities and towns): Camden, Criehaven, Cushing, Friendship, Isle au Haut, Matinicus Isle, Muscle Ridge Shoals, North Haven, Owls Head, Rockland, Rockport, St. George, South Thomaston, Thomaston, Vinalhaven, and WarrenJanuary 10, 2007Attainment
Lincoln County (part) (includes only the following cities and towns): Alna, Boothbay, Boothbay Harbor, Breman, Bristol, Damariscotta, Dresden, Edgecomb, Monhegan, Newcastle, Nobleboro, South Bristol, Southport, Waldoboro, Westport, and WiscassetJanuary 10, 2007Attainment
Waldo County (part) (includes only the following town): IslesboroJanuary 10, 2007Attainment
Portland, ME:
Androscoggin County (part) (includes only the following town): DurhamJanuary 10, 2007Attainment
Cumberland County (part) (includes only the following cities and towns): Brunswick, Cape Elizabeth, Casco, Cumberland, Falmouth, Freeport, Frye Island, Gorham, Gray, Harpswell, Long Island, New Gloucester, North Yarmouth, Portland, Pownal, Raymond, Scarborough, South Portland, Standish, Westbrook, Windham, and YarmouthJanuary 10, 2007Attainment
Sagadahoc County (includes all cities & towns)January 10, 2007Attainment
York County (part) (includes only the following cities and towns): Alfred, Arundel, Berwick, Biddeford, Buxton, Dayton, Elliot, Hollis, Kennebunk, Kennebunkport, Kittery, Limington, Lyman, North Berwick, Ogunquit, Old Orchard Beach, Saco, Sanford, South Berwick, Wells, and YorkJanuary 10, 2007Attainment
Rest of StateUnclassifiable Attainment
Androscoggin County (part) remainder
Aroostook County
Cumberland County (part) remainder
Franklin County
Hancock County (part) remainder
Kennebec County
Knox County (part) remainder
Lincoln County (part) remainder
Oxford County
Penobscot County
Piscataquis County
Somerset County
Waldo County (part) remainder
Washington County
York County (part) remainder

a Includes Indian Country located in each county or area, except as otherwise specified.

1 This date is June 15, 2004, unless otherwise noted.

Maine—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation Classification
Date 1 Type Date 1 Type
Statewide: 2Unclassifiable/Attainment
Androscoggin County
Aroostook County
Cumberland County
Franklin County
Hancock County
Kennebec County
Knox County
Lincoln County
Oxford County
Penobscot County
Piscataquis County
Sagadahoc County
Somerset County
Waldo County
Washington County
York County

1 This date is July 20, 2012, unless otherwise noted.

2 Includes any Indian country in each county or area, unless otherwise specified.

Maine—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area 1 Designation Classification
Date 2 Type Date Type
StatewideAttainment/Unclassifiable
Androscoggin County
Aroostook County
Cumberland County
Franklin County
Hancock County
Kennebec County
Knox County
Lincoln County
Oxford County
Penobscot County
Piscataquis County
Sagadahoc County
Somerset County
Waldo County
Washington County
York County

1 Includes any Indian country in each county or area, unless otherwise specified. EPA is not determining the boundaries of any area of Indian country in this table, including any area of Indian country located in the larger designation area. The inclusion of any Indian country in the designation area is not a determination that the state has regulatory authority under the Clean Air Act for such Indian country.

2 This date is January 16, 2018, unless otherwise noted.

Maine—2008 Lead NAAQS

Designated area Designation for the 2008 NAAQS a
Date 1 Type
Whole StateUnclassifiable/Attainment.

a Includes Indian Country located in each county or area, except as otherwise specified.

1 December 31, 2011 unless otherwise noted.

[43 FR 8964, Mar. 3, 1978] Editorial Note:For Federal Register citations affecting § 81.320, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.
authority: 42 U.S.C. 7401,
source: 36 FR 22421, Nov. 25, 1971, unless otherwise noted.
cite as: 40 CFR 81.320
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