Regulations last checked for updates: Feb 09, 2026

Title 40 - Protection of Environment last revised: Dec 22, 2026
All TitlesTitle 40Chapter IPart 81Subpart C - Subpart C—Section 107 Attainment Status Designations
View all text of Subpart C [§ 81.300 - § 81.356]
§ 81.348 - Washington.

Washington—TSP

Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards
Eastern Washington-Northern Idaho Interstate AQCR 62 (Washington Portion):
SpokaneX
ClarkstonX
Remainder of AQCR 62 (Washington Portion)X
Portland Interstate AQCR 193 (Washington Portion):
Longview—industrial areaX
Vancouver—small portions of the industrial port areaX
Remainder of AQCR 193 (Washington Portion)X
Northern Washington Intrastate AQCR 227X
Olympic-Northwest Washington Intrastate AQCR 228:
Port Angeles—small area of the CBDX
Remainder of AQCR 228X
Puget Sound Intrastate AQCR 229 Seattle—that area including the north portion of the Duwamish industrial area, and extending to the southern boundary of the CBDX
Seattle—an area of the Duwamish extending approximately 2 1/2 miles further south than the above areaX
RentonX
KentX
Tacoma—that area, including the Tide Flats industrial area, east end of the CBD and the north end of the South Tacoma Way corridorX
Remainder of AQCR 229X
South Central Washington Intrastate AQCR 230X

Washington—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 standards
Eastern Washington-Northern Idaho Interstate AQCR 62 (Washington Portion)X
Portland Interstate AQCR 193 (Washington Portion)X
Northern Washington Intrastate AQCR 227X
Olympic-Northwest Washington Intrastate AQCR 228X
Puget Sound Intrastate AQCR 229:
Tacoma-a parabolic shaped area extending approximately 3 1/2 miles SSW from the ASARCO copper smelterX
Remainder of AQCR 229X
South Central Washington Intrastate AQCR 230X

Washington—2010 Sulfur Dioxide NAAQS

[Primary]

Designated area 1 Designation
Date 2 Type
Whatcom County (part)1/16/2025Attainment.
That portion of Whatcom County encompassed by the rectangle with the vertices using Universal Traverse Mercator (UTM) coordinates in UTM zone 10 with datum NAD83 as follows: (1) Vertices—UTM Easting (m) 519671, UTM Northing (m) 5412272; (2) Vertices—UTM Easting (m) 524091, UTM Northing (m) 5412261; (3) Vertices—UTM Easting (m) 519671, UTM Northing (m) 5409010; (1) Vertices—UTM Easting (m) 524111, UTM Northing (m) 5409044.
Lewis CountyUnclassifiable.
Thurston CountyUnclassifiable.
Rest of State:
AdamsAttainment/Unclassifiable.
AsotinAttainment/Unclassifiable.
BentonAttainment/Unclassifiable.
Chelan4/30/2021Attainment/Unclassifiable.
ClallamAttainment/Unclassifiable.
ClarkAttainment/Unclassifiable.
ColumbiaAttainment/Unclassifiable.
CowlitzAttainment/Unclassifiable.
Douglas4/30/2021Attainment/Unclassifiable.
FerryAttainment/Unclassifiable.
FranklinAttainment/Unclassifiable.
GarfieldAttainment/Unclassifiable.
GrantAttainment/Unclassifiable.
Grays HarborAttainment/Unclassifiable.
IslandAttainment/Unclassifiable.
JeffersonAttainment/Unclassifiable.
KingAttainment/Unclassifiable.
KitsapAttainment/Unclassifiable.
KittitasAttainment/Unclassifiable.
KlickitatAttainment/Unclassifiable.
LincolnAttainment/Unclassifiable.
MasonAttainment/Unclassifiable.
OkanoganAttainment/Unclassifiable.
PacificAttainment/Unclassifiable.
Pend OreilleAttainment/Unclassifiable.
PierceAttainment/Unclassifiable.
San JuanAttainment/Unclassifiable.
SkagitAttainment/Unclassifiable.
SkamaniaAttainment/Unclassifiable.
SnohomishAttainment/Unclassifiable.
SpokaneAttainment/Unclassifiable.
StevensAttainment/Unclassifiable.
WahkiakumAttainment/Unclassifiable.
Walla WallaAttainment/Unclassifiable.
Whatcom (remainder)4/30/2021Attainment/Unclassifiable.
WhitmanAttainment/Unclassifiable.
YakimaAttainment/Unclassifiable.

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.

Washington-Carbon Monoxide

Designated Area Designation Classification
Date 1 Type Date 1 Type
Seattle-Tacoma Area:
Seattle-Tacoma Urban Area (as defined by the Washington Department of Transportation urban area maps)
King County (part)Attainment
Pierce County (part)Attainment
Snohomish County (part)Attainment
Spokane Area
Spokane County (part)
Spokane urban area (as defined by the Washington Department of Transportation urban area maps)8/29/2005Attainment
Vancouver Area:
Clark County (part) Air Quality Maintenance Area Attainment
Yakima Area:
Yakima County (part)12/31/2002Attainment
Portion of the Central Business District Street intersections: S. 16th Ave. & W Mead Ave, S. 16th Ave & Hathaway Ave., E “I” St. & N 1st St., N 1st St & E “G” St., E “G” St & N 8th St., N 8th St. & Pitcher St., Pitcher St. & I-82 Interchange, Nob Hill Blvd & I-82 Interchange, Rudkin Rd & I-82 Interchange, S 1st St. & Old Town Rd., Old Town Rd & Main St., W Washington & S 1st St., E Mead Ave & S 1st St., S 16th Ave & W Mead Ave.
AQCR 062 E. Washington-N. Idaho Interstate (Remainder of)Unclassifiable/Attainment
Adams County
Asotin County
Columbia County
Garfield County
Grant County
Lincoln County
Spokane County (part)
area outside Spokane urban area
Whitman County
AQCR 193 Portland Interstate (Remainder of)Unclassifiable/Attainment
Clark County (part)
area outside of Vancouver AQMA
Cowlitz County
Lewis County
Skamania County
Wahkiakum County
AQCR 227 Northern Washington IntrastateUnclassifiable/Attainment
Chelan County
Douglas County
Ferry County
Okanogan County
Pend Oreille County
Stevens County
AQCR 228 Olympia-Northwest Washington IntrastateUnclassifiable/Attainment
Clallam County
Grays Harbor County
Island County
Jefferson County
Mason County
Pacific County
San Juan County
Skagit County
Thurston County
Whatcom County
AQCR 229 Puget Sound Intrastate (Remainder of)Unclassifiable/Attainment
King County (part)
area outside the Seattle-Tacoma Urban Area
Kitsap County
Pierce County (part)
area outside the Seattle-Tacoma Urban Area
Snohomish County (part)
area outside the Seattle-Tacoma Urban Area
AQCR 230 S. Central Washington Intrastate (Remainder of)Unclassifiable/Attainment
Benton County
Franklin County
Kittitas County
Klickitat County
Walla Walla County
Yakima County (part)
portion outside the Central Business District

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

Washington—Ozone (1-Hour Standard) 2

Designated area Designation Classification
Date 1 Type Date 1 Type
Portland-Vancouver AQMA Area:
Clark County (part) Air Quality Maintenance AreaAttainment
Seattle-Tacoma Area:
The following boundary includes all of Pierce County, and all of King County except a small portion on the north-east corner and the western portion of Snohomish County: Starting at the mouth of the Nisqually river extend northwesterly along the Pierce County line to the southernmost point of the west county line of King County; thence northerly along the county line to the southernmost point of the west county line of Snohomish County; thence northerly along the county line to the intersection with SR 532; thence easterly along the north line of SR 532 to the intersection of I-5, continuing east along the same road now identified as Henning Rd., to the intersection with SR 9 at Bryant; thence continuing easterly on Bryant East Rd. and Rock Creek Rd., also identified as Grandview Rd., approximately 3 miles to the point at which it is crossed by the existing BPA electrical transmission line; thence southeasterly along the BPA transmission line approximately 8 miles to point of the crossing of the south fork of the Stillaguamish River; thence continuing in a southeasterly direction in a meander line following the bed of the River to Jordan Road; southerly along Jordan Road to the north city limits of Granite Falls; thence following the north and east city limits to 92nd St. N.E. and Menzel Lake Rd.; thence south-southeasterly along the Menzel Lake Rd. and the Lake Roesiger Rd. a distance of approximately 6 miles to the northernmost point of Lake Roesiger; thence southerly along a meander line following the middle of the Lake and Roesiger Creek to Woods Creek; thence southerly along a meander line following the bed of the Creek approximately 6 miles to the point the Creek is crossed by the existing BPA electrical transmission line; thence easterly along the BPA transmission line approximately 0.2 miles; thence southerly along the BPA Chief Joseph-Covington electrical transmission line approximately 3 miles to the north line of SR 2; thence southeasterly along SR 2 to the intersection with the east county line of King County; thence south along the county line to the northernmost point of the east county line of Pierce County; thence along the county line to the point of beginning at the mouth of the Nisqually RiverAttainment
AQCR 062 E Washington-N Idaho Interstate (part)Attainment
Spokane CountyUnclassifiable/Attainment
AQCR 062 E Washington-N Idaho Interstate (Remainder of)Unclassifiable/Attainment
Adams County
Asotin County
Columbia County
Garfield County
Grant County
Lincoln County
Whitman County
AQCR 193 Portland Interstate (Remainder of)Unclassifiable/Attainment
Clark County (part) Remainder of county
Cowlitz County
Lewis County
Skamania County
Wahkiakum County
AQCR 227 Northern Washington IntrastateUnclassifiable/Attainment
Chelan County
Douglas County
Ferry County
Okanogan County
Pend Oreille County
Stevens County
AQCR 228 Olympic-Northwest Washington IntrastateUnclassifiable/Attainment
Clallam County
Grays Harbor County
Island County
Jefferson County
Mason County
Pacific County
San Juan County
Skagit County
Thurston County
Whatcom County
AQCR 229 Puget Sound Intrastate (Remainder of)Unclassifiable/Attainment
King County (Part) Remainder of County
Kitsap County
Snohomish County (Part) Remainder of County
AQCR 230 South Central Washington IntrastateUnclassifiable/Attainment
Benton County
Franklin County
Kittitas County
Klickitat County
Walla Walla County
Yakima County

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

2 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Washington. The Portland-Vancouver AQMA and Seattle-Tacoma areas are maintenance areas for the 1-hour NAAQS for purposes of 40 CFR part 51 subpart X.

Washington—PM-10

Designated Area Designation Classification
Date Type Date Type
King County:
The portion of the City of Seattle bounded on the east by I-5/East Duwamish Greenbelt, on the south by 104th street, on the west by the West Duwamish Greenbelt north to Fairmont Avenue, S.W., north on Fairmont Avenue to Elliot Bay, and Dearborn Street to I-55/14/2001Attainment
The City of Kent and a portion of the Green River valley bounded on the east and west by the 100 foot contour, on the north by South 212th Street, and on the south by Highway 5165/14/2001Attainment
Pierce County:
Tacoma metropolitan area bounded on the north by Marine View Drive from Commencement Bay east to the 100 foot contour, southeast along the 100 foot contour to 64th Avenue east, south along 64th Avenue east as extended to I-5, I-5 west to the 100 foot contour near Pacific Avenue, and north along the 100 foot contour to Commencement Bay5/14/2001Attainment
Spokane County:
The area bounded on the south by a line from Universal Transmercator (UTM) coordinate 489000mE, 5271000mN west to 458000mE, 5271000mN, thence north along a line to coordinate 458000mE, 5288000mN, thence east to 463000mE, 5288000mN, thence north to 463000mE, 5292000mN, thence east to 481000mE, 5292000mN, thence south to 481000mE, 5288000mN, thence east to 489000mE, 5288000mN, thence south to the beginning coordinate, 489000mE, 5271000mN8/30/2005Attainment
Yakima County
The area bounded on the south by a line from UTM coordinate 694000mW, 5157000mN, west to 681000mW, 5157000mN, thence north along a line to coordinate 681000mN, 5172000mN, thence east to 694000mW, 5172000mN, thence south to the beginning coordinate 694000mW, 5157000mN, excluding the area within the exterior boundary of the Yakama Indian Reservation3/10/2005Attainment
Thurston County
Cities of Olympia, Tumwater, and Lacey12/04/2000Attainment
Walla Walla and Benton Counties
Wallula:
The area bounded on the south by a line from UTM coordinate 5099975mN, 362500mE, west to 5099975mN, 342500mE, thence north along a line to coordinate 5118600mN, 342500mE, thence east to 5118600mN, 362500mE, thence south to the beginning coordinate 5099975mN, 362500mE9/26/2005Attainment.
Rest of State11/15/1990Unclassifiable

Washington—1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Portland—Vancouver AQMA:
Clark County (part)Unclassifiable/Attainment
Air quality maintenance area
Seattle—Tacoma Area:Unclassifiable/Attainment
The following boundary includes all of Pierce County, and all of King County except a small portion on the north-east corner and the western portion of Snohomish County: Starting at the mouth of the Nisqually River extend northwesterly along the Pierce County line to the southernmost point of the west county line of King County; thence northerly along the county line to the southernmost point of the west county line of Snohomish County; thence northerly along the county line to the intersection with SR 532; thence easterly along the north line of SR 532 to the intersection of I-5, continuing east along the same road now identified as Henning Rd., to the intersection with SR 9 at Bryant;
thence continuing easterly on Bryant East Rd. and Rock Creek Rd., also identified as Grandview Rd., approximately 3 miles to the point at which it is crossed by the existing BPA electrical transmission line; thence southeasterly along the BPA transmission line approximately 8 miles to point of the crossing of the south fork of the Stillaguamish River; thence continuing in a southeasterly direction in a meander line following the bed of the River to Jordan Road; southerly along Jordan Road to the north city limits of Granite Falls; thence following the north and east city limits to 92nd St. N.E. and Menzel Lake Rd.; thence south-southeasterly along the Menzel Lake Rd. and the Lake Roesiger Rd. a distance of approximately 6 miles to the northernmost point of Lake Roesiger; thence southerly along a meander line following the middle of the Lake and Roesiger Creek to Woods Creek; thence southerly along a meander line following the bed of the Creek approximately 6 miles to the point the Creek is crossed by the existing BPA electrical transmission line; thence easterly along the BPA transmission line approximately 0.2 miles; thence southerly along the BPA Chief Joseph-Covington electrical transmission line approximately 3 miles to the north line of SR 2; thence southeasterly along SR 2 to the intersection with the east county line of King County; thence south along the county line to the northernmost point of the east county line of Pierce County; thence along the county line to the point of beginning at the mouth of the Nisqually River.
AQCR 062 E Washington-N Idaho Interstate (part):
Spokane CountyUnclassifiable/Attainment
AQCR 062 E Washington-N Idaho Interstate (remainder of):
Adams CountyUnclassifiable/Attainment
Asotin CountyUnclassifiable/Attainment
Columbia CountyUnclassifiable/Attainment
Garfield CountyUnclassifiable/Attainment
Grant CountyUnclassifiable/Attainment
Lincoln CountyUnclassifiable/Attainment
Whitman CountyUnclassifiable/Attainment
AQCR 193 Portland Interstate (remainder of):
Clark County (remainder)Unclassifiable/Attainment
Cowlitz CountyUnclassifiable/Attainment
Lewis CountyUnclassifiable/Attainment
Skamania CountyUnclassifiable/Attainment
Wahkiakum CountyUnclassifiable/Attainment
AQCR 227 Northern Washington Intrastate:
Chelan CountyUnclassifiable/Attainment
Douglas CountyUnclassifiable/Attainment
Ferry CountyUnclassifiable/Attainment
Okanogan CountyUnclassifiable/Attainment
Pend Oreille CountyUnclassifiable/Attainment
Stevens CountyUnclassifiable/Attainment
AQCR 228 Olympic-Northwest Washington Intrastate:
Clallam CountyUnclassifiable/Attainment
Grays Harbor CountyUnclassifiable/Attainment
Island CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Mason CountyUnclassifiable/Attainment
Pacific CountyUnclassifiable/Attainment
San Juan CountyUnclassifiable/Attainment
Skagit CountyUnclassifiable/Attainment
Thurston CountyUnclassifiable/Attainment
Whatcom CountyUnclassifiable/Attainment
AQCR 229 Puget Sound Intrastate (remainder of):
King County (remainder)Unclassifiable/Attainment
Kitsap CountyUnclassifiable/Attainment
Snohomish County (remainder)Unclassifiable/Attainment
AQCR 230 South Central Washington Intrastate:
Benton CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Kittitas CountyUnclassifiable/Attainment
Klickitat CountyUnclassifiable/Attainment
Walla Walla CountyUnclassifiable/Attainment
Yakima CountyUnclassifiable/Attainment
Seattle-Tacoma Area:
Pierce 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.

Washington—2012 Annual PM2.5 NAAQS

[Primary]

Designated area 1 Designation Classification
Date 2 Type Date 2 Type
Statewide:
Adams CountyUnclassifiable/Attainment
Asotin CountyUnclassifiable/Attainment
Benton CountyUnclassifiable/Attainment
Clark CountyUnclassifiable/Attainment
Clallam CountyUnclassifiable/Attainment
Columbia CountyUnclassifiable/Attainment
Cowlitz CountyUnclassifiable/Attainment
Douglas CountyUnclassifiable/Attainment
Ferry CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Garfield CountyUnclassifiable/Attainment
Grant CountyUnclassifiable/Attainment
Grays Harbor CountyUnclassifiable/Attainment
Island CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
King CountyUnclassifiable/Attainment
Kitsap CountyUnclassifiable/Attainment
Kittitas CountyUnclassifiable/Attainment
Klickitat CountyUnclassifiable/Attainment
Lincoln CountyUnclassifiable/Attainment
Mason CountyUnclassifiable/Attainment
Okanogan CountyUnclassifiable/Attainment
Pacific CountyUnclassifiable/Attainment
Pend Oreille CountyUnclassifiable/Attainment
Pierce CountyUnclassifiable/Attainment
San Juan CountyUnclassifiable/Attainment
Skagit CountyUnclassifiable/Attainment
Skamania CountyUnclassifiable/Attainment
Snohomish CountyUnclassifiable/Attainment
Spokane CountyUnclassifiable/Attainment
Stevens CountyUnclassifiable/Attainment
Thurston CountyUnclassifiable/Attainment
Wahkiakum CountyUnclassifiable/Attainment
Walla Walla CountyUnclassifiable/Attainment
Whatcom CountyUnclassifiable/Attainment
Whitman CountyUnclassifiable/Attainment
Yakima 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.

Washington—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Tacoma, WA:
Pierce County (part)Unclassifiable/Attainment
Starting from where an extension of Kennedy Road Northeast would intersect Commencement Bay, proceed north to the intersection of Marine View Drive (State Route 509) and Kennedy Road Northeast. Proceed south on Marine View Drive to Hylebos Creek. Proceed south along Hylebos Creek to 12th Street East. Proceed east on 12th Street East to 70th Avenue East. Proceed south on 70th Avenue East to State Route 99 (S.R. 99). Proceed north on S.R. 99 0.1 mile north of Birch Street to a driveway to the east. Proceed east along the driveway and continue east along the same alignment to the Pierce County Line/Comprehensive Urban Growth Area (CUGA) boundary. Proceed east along the Pierce County Line/CUGA boundary to the eastern boundary of Edgewood. Proceed south along the eastern boundary of Edgewood to eastern boundary of the Sumner Urban Service Area. Proceed south along eastern boundary of the Sumner Urban Service Area to the eastern boundary of the Puyallup Urban Service Area. Proceed south along the eastern boundary of the Puyallup Urban Service Area to the eastern boundary of Puyallup/CUGA boundary.
Proceed south and then west along the CUGA boundary to the eastern boundary of McChord Air Force Base. Proceed north along the eastern boundary of McChord Air Force Base to the northernmost point on the eastern boundary. Proceed from the northernmost point on the eastern boundary of McChord Air Force Base to the south right-of-way of S.R. 512. Proceed west along the south right-of-way of S.R. 512 to the south right-of-way of I-5. Proceed south along the south right-of-way to I-5 to the point opposite the boundary between Lakewood and Camp Murray. Proceed north across I-5 to the boundary between Lakewood and Camp Murray. Proceed north along the western boundary of Lakewood to the point where the western boundary coincides with the CUGA boundary. Proceed north along the CUGA boundary to the southern boundary of Point Defiance Park. Proceed east along the southern boundary of Point Defiance Park to Commencement Bay/CUGA boundary. Proceed southeast, then northeast, and finally northwest along the CUGA boundary to the starting point.
Rest of State:
Adams CountyUnclassifiable/Attainment
Asotin CountyUnclassifiable/Attainment
Benton CountyUnclassifiable/Attainment
Clark CountyUnclassifiable/Attainment
Clallam CountyUnclassifiable/Attainment
Columbia CountyUnclassifiable/Attainment
Cowlitz CountyUnclassifiable/Attainment
Douglas CountyUnclassifiable/Attainment
Ferry CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Garfield CountyUnclassifiable/Attainment
Grant CountyUnclassifiable/Attainment
Grays Harbor CountyUnclassifiable/Attainment
Island CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
King CountyUnclassifiable/Attainment
Kitsap CountyUnclassifiable/Attainment
Kittitas CountyUnclassifiable/Attainment
Klickitat CountyUnclassifiable/Attainment
Lincoln CountyUnclassifiable/Attainment
Mason CountyUnclassifiable/Attainment
Okanogan CountyUnclassifiable/Attainment
Pacific CountyUnclassifiable/Attainment
Pend Oreille CountyUnclassifiable/Attainment
Pierce County (remainder)Unclassifiable/Attainment
San Juan CountyUnclassifiable/Attainment
Skagit CountyUnclassifiable/Attainment
Skamania CountyUnclassifiable/Attainment
Snohomish CountyUnclassifiable/Attainment
Spokane CountyUnclassifiable/Attainment
Stevens CountyUnclassifiable/Attainment
Thurston CountyUnclassifiable/Attainment
Wahkiakum CountyUnclassifiable/Attainment
Walla Walla CountyUnclassifiable/Attainment
Whatcom CountyUnclassifiable/Attainment
Whitman CountyUnclassifiable/Attainment
Yakima 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.

Washington—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date 2 Type
Tacoma, WA
Pierce County (part)3/12/2015Attainment
Starting from where an extension of Kennedy Road Northeast would intersect Commencement Bay, proceed north to the intersection of Marine View Drive (State Route 509) and Kennedy Road Northeast. Proceed south on Marine View Drive to Hylebos Creek. Proceed south along Hylebos Creek to 12th Street East. Proceed east on 12th Street East to 70th Avenue East. Proceed south on 70th Avenue East to State Route 99 (S.R. 99). Proceed north on S.R. 99 0.1 mile north of Birch Street to a driveway to the east. Proceed east along the driveway and continue east along the same alignment to the Pierce County Line/Comprehensive Urban Growth Area (CUGA) boundary. Proceed east along the Pierce County Line/CUGA boundary to the eastern boundary of Edgewood. Proceed south along the eastern boundary of Edgewood to eastern boundary of the Sumner Urban Service Area. Proceed south along eastern boundary of the Sumner Urban Service Area to the eastern boundary of the Puyallup Urban Service Area. Proceed south along the eastern boundary of the Puyallup Urban Service Area to the eastern boundary of Puyallup/CUGA boundary.
Proceed south and then west along the CUGA boundary to the eastern boundary of McChord Air Force Base. Proceed north along the eastern boundary of McChord Air Force Base to the northernmost point on the eastern boundary. Proceed from the northernmost point on the eastern boundary of McChord Air Force Base to the south right-of-way of S.R. 512. Proceed west along the south right-of-way of S.R. 512 to the south right-of-way of I-5. Proceed south along the south right-of-way to I-5 to the point opposite the boundary between Lakewood and Camp Murray. Proceed north across I-5 to the boundary between Lakewood and Camp Murray. Proceed north along the western boundary of Lakewood to the point where the western boundary coincides with the CUGA boundary. Proceed north along the CUGA boundary to the southern boundary of Point Defiance Park. Proceed east along the southern boundary of Point Defiance Park to Commencement Bay/CUGA boundary. Proceed southeast, then northeast, and finally northwest along the CUGA boundary to the starting point
Rest of State:
Adams CountyUnclassifiable/Attainment
Asotin CountyUnclassifiable/Attainment
Benton CountyUnclassifiable/Attainment
Clark CountyUnclassifiable/Attainment
Clallam CountyUnclassifiable/Attainment
Columbia CountyUnclassifiable/Attainment
Cowlitz CountyUnclassifiable/Attainment
Douglas CountyUnclassifiable/Attainment
Ferry CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Garfield CountyUnclassifiable/Attainment
Grant CountyUnclassifiable/Attainment
Grays Harbor CountyUnclassifiable/Attainment
Island CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
King CountyUnclassifiable/Attainment
Kitsap CountyUnclassifiable/Attainment
Kittitas CountyUnclassifiable/Attainment
Klickitat CountyUnclassifiable/Attainment
Lincoln CountyUnclassifiable/Attainment
Mason CountyUnclassifiable/Attainment
Okanogan CountyUnclassifiable/Attainment
Pacific CountyUnclassifiable/Attainment
Pend Oreille CountyUnclassifiable/Attainment
Pierce County (remainder)Unclassifiable/Attainment
San Juan CountyUnclassifiable/Attainment
Skagit CountyUnclassifiable/Attainment
Skamania CountyUnclassifiable/Attainment
Snohomish CountyUnclassifiable/Attainment
Spokane CountyUnclassifiable/Attainment
Stevens CountyUnclassifiable/Attainment
Thurston CountyUnclassifiable/Attainment
Wahkiakum CountyUnclassifiable/Attainment
Walla Walla CountyUnclassifiable/Attainment
Whatcom CountyUnclassifiable/Attainment
Whitman CountyUnclassifiable/Attainment
Yakima CountyUnclassifiable/Attainment

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

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

2This date is July 2, 2034, unless otherwise noted.

Washington—NO2 (1971 Annual Standard)

Designated area Does not meet primary standards Cannot be classified or better than national standards
Eastern Washington-Northern Idaho, Interstate AQCR 62 (Washington Portion)X
Portland Interstate AQCR 193 (Washington Portion)X
Northern Washington Intrastate AQCR 227X
Olympic-Northwest Washington, Intrastate AQCR 228X
Puget Sound Intrastate AQCR 229X
South Central Washington Intrastate AQCR 230X

Washington—NO2

[2010 1-Hour standard]

Designated area Designation a
Date 1 Type
Puget Sound Intrastate AQCRUnclassifiable/Attainment.
Portland (Oregon)-Southwest Washington Interstate AQCR (Washington portion)Unclassifiable/Attainment.
Eastern Washington-Northern Idaho Interstate AQCR (Washington portion)Unclassifiable/Attainment.
Northern Washington Intrastate AQCRUnclassifiable/Attainment.
Olympic-Northwest Washington Intrastate AQCRUnclassifiable/Attainment.
South Central Washington Intrastate AQCRUnclassifiable/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.

Washington—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation a Category/classification
Date 1 Type Date 1 Type
Portland-Vancouver AQMA Area:
Clark County (part)Unclassifiable/Attainment
Air Quality Maintenance Area
Seattle-Tacoma Area:Unclassifiable/Attainment
The following boundary includes all of Pierce County, and all of King County except a small portion on the north-east corner and the western portion of Snohomish County: Starting at the mouth of the Nisqually river extend northwesterly along the Pierce County line to the southernmost point of the west county line of King County; thence northerly along the county line to the southernmost point of the west county line of Snohomish County; thence northerly along the county line to the intersection with SR 532; thence easterly along the north line of SR 532 to the intersection of I-5, continuing east along the same road now identified as Henning Rd., to the intersection with SR 9 at Bryant; thence continuing easterly on Bryant East Rd. and Rock Creek Rd., also identified as Grandview Rd., approximately 3 miles to the point at which it is crossed by the existing BPA electrical transmission line; thence southeasterly along the BPA transmission line approximately 8 miles to point of the crossing of the south fork of the Stillaguamish River; thence continuing in a southeasterly direction in a meander line following the bed of the River to Jordan Road; southerly along Jordan Road to the north city limits of Granite Falls; thence following the north and east city limits to 92nd St. NE., and Menzel Lake Rd.; thence south-southeasterly along the Menzel Lake Rd., and the Lake Roesiger Rd., a distance of approximately 6 miles to the northernmost point of Lake Roesiger; thence southerly along a meander line following the middle of the Lake and Roesiger Creek to Woods Creek; thence southerly along a meander line following the bed of the Creek approximately 6 miles to the point the Creek is crossed by the existing BPA electrical transmission line; thence easterly along the BPA transmission line approximately 0.2 miles; thence southerly along the BPA Chief Joseph-Covington electrical transmission line approximately 3 miles to the north line of SR 2; thence southeasterly along SR 2 to the intersection with the east county line of King County; thence south along the county line to the northernmost point of the east county line of Pierce County; thence along the county line to the point of beginning at the mouth of the Nisqually River
AQCR 062 E Washington-N Idaho Interstate (part)Unclassifiable/Attainment
Spokane CountyUnclassifiable/Attainment
AQCR 062 E Washington-N Idaho Interstate (remainder of)Unclassifiable/Attainment
Adams County
Asotin County
Columbia County
Garfield County
Grant County
Lincoln County
Whitman County
AQCR 193 Portland Interstate (remainder of)Unclassifiable/Attainment
Clark County (part) remainder
Cowlitz County
Lewis County
Skamania County
Wahkiakum County
AQCR 227 Northern Washington IntrastateUnclassifiable/Attainment
Chelan County
Douglas County
Ferry County
Okanogan County
Pend Oreille County
Stevens County
AQCR 228 Olympic-Northwest Washington IntrastateUnclassifiable/Attainment
Clallam County
Grays Harbor County
Island County
Jefferson County
Mason County
Pacific County
San Juan County
Skagit County
Thurston County
Whatcom County
AQCR 229 Puget Sound Intrastate (remainder of)Unclassifiable/Attainment
King County (part) remainder
Kitsap County
Snohomish County (part) remainder
AQCR 230 South Central Washington IntrastateUnclassifiable/Attainment
Benton County
Franklin County
Kittitas County
Klickitat County
Walla Walla County
Yakima County

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

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

Washington—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation 1 Classification
Date 2 Type Date 1 Type
Clark CountyUnclassifiable/Attainment
King CountyUnclassifiable/Attainment
Pierce CountyUnclassifiable/Attainment
Spokane CountyUnclassifiable/Attainment
Thurston CountyUnclassifiable/Attainment
Rest of state and rest of Indian countryUnclassifiable/Attainment

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

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

Washington—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area 1 Designation Classification
Date 2 Type Date 2 Type
Tri-Cities Area, WA1/16/2018Unclassifiable
Benton County.
Franklin County.
Walla Walla County.
Adams County1/16/2018Attainment/Unclassifiable
Asotin County1/16/2018Attainment/Unclassifiable
Chelan County1/16/2018Attainment/Unclassifiable
Clallam County1/16/2018Attainment/Unclassifiable
Clark CountyAttainment/Unclassifiable
Columbia County1/16/2018Attainment/Unclassifiable
Cowlitz CountyAttainment/Unclassifiable
Douglas County1/16/2018Attainment/Unclassifiable
Ferry County1/16/2018Attainment/Unclassifiable
Garfield County1/16/2018Attainment/Unclassifiable
Grant County1/16/2018Attainment/Unclassifiable
Grays Harbor County1/16/2018Attainment/Unclassifiable
Island County1/16/2018Attainment/Unclassifiable
Jefferson County1/16/2018Attainment/Unclassifiable
King County1/16/2018Attainment/Unclassifiable
Kitsap County1/16/2018Attainment/Unclassifiable
Kittitas County1/16/2018Attainment/Unclassifiable
Klickitat County1/16/2018Attainment/Unclassifiable
Lewis County1/16/2018Attainment/Unclassifiable
Lincoln County1/16/2018Attainment/Unclassifiable
Mason County1/16/2018Attainment/Unclassifiable
Okanogan County1/16/2018Attainment/Unclassifiable
Pacific County1/16/2018Attainment/Unclassifiable
Pend Oreille County1/16/2018Attainment/Unclassifiable
Pierce County1/16/2018Attainment/Unclassifiable
San Juan County1/16/2018Attainment/Unclassifiable
Skagit County1/16/2018Attainment/Unclassifiable
Skamania CountyAttainment/Unclassifiable
Snohomish County1/16/2018Attainment/Unclassifiable
Spokane County1/16/2018Attainment/Unclassifiable
Stevens County1/16/2018Attainment/Unclassifiable
Thurston County1/16/2018Attainment/Unclassifiable
Wahkiakum County1/16/2018Attainment/Unclassifiable
Whatcom County1/16/2018Attainment/Unclassifiable
Whitman County1/16/2018Attainment/Unclassifiable
Yakima County1/16/2018Attainment/Unclassifiable

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 August 3, 2018, unless otherwise noted.

Washington—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.

[54 FR 27346, June 29, 1989] Editorial Note:For Federal Register citations affecting § 81.348, 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 81.348
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