1. Regulations
  2. title 40
  3. chapter I-i19
  4. part 81
  5. subpart C
  6. § 81.345

View all text of Subpart C [§ 81.300 - § 81.356]

§ 81.345 - Utah.

Utah—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 Salt Lake County1 X1 X Portions of Tooele County1 X1 X Rest of StateX

1 EPA designation replaces State designation.

Utah—2010 Sulfur Dioxide NAAQS

[Primary]

Designated area 1Designation Date 2Type Statewide: Beaver CountyAttainment/Unclassifiable. Box Elder CountyAttainment/Unclassifiable. Cache CountyAttainment/Unclassifiable. Carbon CountyAttainment/Unclassifiable. Daggett CountyAttainment/Unclassifiable. Davis CountyAttainment/Unclassifiable. Duchesne CountyAttainment/Unclassifiable. Emery CountyAttainment/Unclassifiable. Garfield CountyAttainment/Unclassifiable. Grand CountyAttainment/Unclassifiable. Iron CountyAttainment/Unclassifiable. Juab CountyAttainment/Unclassifiable. Kane CountyAttainment/Unclassifiable. Millard CountyAttainment/Unclassifiable. Morgan CountyAttainment/Unclassifiable. Piute CountyAttainment/Unclassifiable. Rich CountyAttainment/Unclassifiable. Salt Lake CountyAttainment/Unclassifiable. San Juan CountyAttainment/Unclassifiable. Sanpete CountyAttainment/Unclassifiable. Sevier CountyAttainment/Unclassifiable. Summit CountyAttainment/Unclassifiable. Tooele CountyAttainment/Unclassifiable. Uintah CountyAttainment/Unclassifiable. Utah CountyAttainment/Unclassifiable. Wasatch CountyAttainment/Unclassifiable. Washington CountyAttainment/Unclassifiable. Wayne CountyAttainment/Unclassifiable. Weber CountyAttainment/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. The lands of the Navajo Nation, including those lands located geographically within Utah, are excluded, as they are separately designated under Section 81.303.

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

Utah—Carbon Monoxide

Designated Area Designation Classification Date 1Type Date 1Type Ogden Area Weber County (part) city of Ogden5/8/01Attainment Provo Area Utah County (part) city of Provo1/3/06Attainment Salt Lake City Area3/22/99Attainment Salt Lake County (part), Salt Lake City Rest of StateUnclassifiable/Attainment Beaver County Box Elder County Cache County Carbon County Daggett County Davis County Duchesne County Emery County Garfield County Grand County Iron County Juab County Kane County Millard County Morgan County Piute County Rich County Salt Lake County (part) Remainder of Salt Lake County San Juan County Sanpete County Sevier County Summit County Tooele County Uintah County Utah County (part) Remainder of Utah county Wasatch County Washington County Wayne County Weber County (part) Remainder of Weber county

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

Utah—Ozone (1-Hour Standard) 2

Designated area Designation Classification Date 1Type Date 1Type Salt Lake City Area: Davis CountyAttainment Salt Lake CountyAttainment Rest of StateUnclassifiable/Attainment Beaver County Box Elder County Cache County Carbon County Daggett County Duchesne County Emery County Garfield County Grand County Iron County Juab County Kane County Millard County Morgan County Piute County Rich County San Juan County Sanpete County Sevier County Summit County Tooele County Uintah County Utah County Wasatch County Washington County Wayne County Weber 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 Utah. The Salt Lake City area is a maintenance area for the 1-hour NAAQS for purposes of 40 CFR part 51 subpart X.

Utah—PM-10

Designated Area Designation Classification Date Type Date Type Salt Lake County3/27/2020Attainment Utah County3/27/2020Attainment Ogden Area Weber County (part) City of Ogden3/27/2020Attainment Rest of State 111/15/90Unclassifiable

1 Denotes a single area designation for PSD baseline area purposes.

Utah—1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation aClassification Date 1Type Date Type Box Elder County, UT (part):Box Elder County (except Brigham City)Unclassifiable/Attainment Brigham City, UT:Box Elder County (part)Unclassifiable/Attainment The area surrounding Brigham City, as described by the following Townships or the portions of the following Townships in Box Elder County: T9N 2W, T9N R1W, T8N 2WCache County, UT (part):Cache County (except Lower Cache Valley)Unclassifiable/Attainment Davis County, UT (part):Davis County (except Wasatch Front)Unclassifiable/Attainment Grantsville, UT:Tooele County (part)Unclassifiable/Attainment The area surrounding Grantsville, as described by the following Townships or the portions of the following Townships in Tooele County: T2S R6W, T2S R5W, T2S R4W, T3S R6W, T3S R5W, T3S R4W, T4S R6W, T4S R5W, T4S R4WLower Cache Valley, UT:Cache County (part)Unclassifiable/Attainment The Cache Valley, below 6500 ft. msl. This area is described by the following list of Townships or the portions of the following Townships in Cache County: T15N R1E, T15N R2W, T15N R1W, T14N R2W, T14N R1W, T14N R1E, T13N R2W, T13N R1W, T13N R1E, T12N R2W, T12N R1W, T12N R1E, T11N R1W, T11N R1E, T10N R1W, T10N R1E, T9N R1ESalt Lake County, UT (part):Salt Lake County (except Wasatch Front)Unclassifiable/Attainment Tooele County, UT (part):Tooele County (remainder)Unclassifiable/Attainment Utah County, UT (part):Utah County (except Wasatch Front)Unclassifiable/Attainment Wasatch Front, UT:Davis County (part)Unclassifiable/Attainment The portion of the Wasatch Front residing in Davis County, as described by the following Townships or the portions of the following Townships in Davis County: T5N R3W, T5N R2W, T5N R1W, T4N R2W, T4N R1W, T3N R1W, T3N R1E, T2N R1W, T2N R1E, T1N R1W, T1N R1E.Salt Lake County (part)Unclassifiable/Attainment The portion of the Wasatch Front residing in Salt Lake County, as described by the following Townships or the portions of the following Townships in Salt Lake County: T1N R2W, T1N R1W, T1N R1E, T1S R3W, T1S R2W, T1S R1W, T1S R1E, T2S R3W, T2S R2W, T2S R1W, T2S R1E, T3S R3W, T3S R2W, T3S R1W, T3S R1E, T4S R3W, T4S R2W, T4S R1W, T4S R1E.Utah County (part)Unclassifiable/Attainment The portion of the Wasatch Front residing in Utah County, as described by the following Townships or the portions of the following Townships in Utah County: T4S R2W, T4S R1W, T4S R1E, T4S R2E, T5S R2W, T5S R1W, T5S R1E, T5S R2E, T6S R3W, T6S R2W, T6S R1W, T6S R2E, T6S R3E, T6S R1E, T7S R3W, T7S R2W, T7S R1W, T7S R1E, T7S R2E, T7S R3E, T8S R3W, T8S R2W, T8S R1W, T8S R3E, T8S R2E, T8S R1E, T9S R3W, T9S R2W, T9S R1E, T9S R3E, T9S R2E, T9S R1W, T10S 2W, T10S R2E, T10S R1E, T10S R1W, T1S R2W, T11S R1W, T12S R2W.Weber County (part)Unclassifiable/Attainment The portion of the Wasatch Front residing in Weber County, as described by the following Townships or the portions of the following Townships in Weber County: T7N R2W, T7N R1W, T7N R3W, T6N R3W, T6N R2W, T6N R1W, T5N R3W, T5N R2W, T5N R1WWeber County, UT (part):Weber County (except Wasatch Front)Unclassifiable/Attainment Rest of State:Beaver CountyUnclassifiable/Attainment Carbon CountyUnclassifiable/Attainment Daggett CountyUnclassifiable/Attainment Duchesne CountyUnclassifiable/Attainment Emery CountyUnclassifiable/Attainment Garfield CountyUnclassifiable/Attainment Grand CountyUnclassifiable/Attainment Iron CountyUnclassifiable/Attainment Juab CountyUnclassifiable/Attainment Kane CountyUnclassifiable/Attainment Millard CountyUnclassifiable/Attainment Morgan CountyUnclassifiable/Attainment Piute CountyUnclassifiable/Attainment Rich CountyUnclassifiable/Attainment San Juan CountyUnclassifiable/Attainment Sanpete CountyUnclassifiable/Attainment Sevier CountyUnclassifiable/Attainment Summit CountyUnclassifiable/Attainment Uintah CountyUnclassifiable/Attainment Wasatch CountyUnclassifiable/Attainment Washington CountyUnclassifiable/Attainment Wayne CountyUnclassifiable/Attainment

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

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

Utah—2012 Annual PM2.5 NAAQS

[Primary]

Designated area 1Designation Classification Date 2Type Date 2Type Statewide: Beaver CountyUnclassifiable/Attainment Box Elder CountyUnclassifiable/Attainment Cache CountyUnclassifiable/Attainment Carbon CountyUnclassifiable/Attainment Daggett CountyUnclassifiable/Attainment Davis CountyUnclassifiable/Attainment Duchesne CountyUnclassifiable/Attainment Emery CountyUnclassifiable/Attainment Garfield CountyUnclassifiable/Attainment Grand CountyUnclassifiable/Attainment Iron CountyUnclassifiable/Attainment Juab CountyUnclassifiable/Attainment Kane CountyUnclassifiable/Attainment Millard CountyUnclassifiable/Attainment Morgan CountyUnclassifiable/Attainment Piute CountyUnclassifiable/Attainment Rich CountyUnclassifiable/Attainment Salt Lake CountyUnclassifiable/Attainment San Juan CountyUnclassifiable/Attainment Sanpete CountyUnclassifiable/Attainment Sevier CountyUnclassifiable/Attainment Summit CountyUnclassifiable/Attainment Tooele CountyUnclassifiable/Attainment Uintah CountyUnclassifiable/Attainment Utah CountyUnclassifiable/Attainment Wasatch CountyUnclassifiable/Attainment Washington CountyUnclassifiable/Attainment Wayne CountyUnclassifiable/Attainment Weber 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.

Utah—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation aClassification Date 1Type Date Type Logan, UT-ID: Cache County (part)Unclassifiable/Attainment. All portions of Cache County west of and including any portion of the following townships located within Utah: Township 15 North Range 1 East; Township 14 North Range 1 East; Township 13 North Range 1 East; Township 12 North Range 1 East; Township 11 North Range 1 East; Township 10 North Range 1 East; Township 9 North Range 1 East. Provo, UT: Utah County (part)Unclassifiable/Attainment. The area of Utah County that lies west of the Wasatch Mountain Range (and this includes the Cities of Provo and Orem) with an eastern boundary for Utah County to be defined as the following Townships: Township 3 South Range 1 East; Township 4 South Range 2 East; Township 5 South Range 3 East; Township 6 South Range 3 East; Township 7 South Range 3 East; Township 8 South Range 3 East; Township 9 South Range 3 East; Township 10 South Range 2 East. Salt Lake City, UT: Box Elder County (part)Unclassifiable/Attainment. The following Townships or portions thereof as noted (including Brigham City): Township 7 North Range 2 West; Township 8 North Range 2 West; Township 9 North Range 2 West; Township 10 North Range 2 West; Township 11 North Range 2 West; Township 12 North Range 2 West; Township 13 North Range 2 West; Township 9 North Range 3 West; Township 10 North Range 3 West; Township 11 North Range 3 West; Township 12 North Range 3 West; Township 13 North Range 3 West; Township 13 North Range 4 West; Township 12 North Range 4 West; Township 11 North Range 4 West; Township 10 North Range 4 West; Township 9 North Range 4 West; Township 13 North Range 5 West; Township 12 North Range 5 West; Township 11 North Range 5 West; Township 10 North Range 5 West; Township 9 North Range 5 West; Township 13 North Range 6 West; Township 12 North Range 6 West; Township 11 North Range 6 West; Township 10 North Range 6 West; Township 9 North Range 6 West; Township 7 North Range 1 West (portion located in Box Elder County); Township 8 North Range 1 West (portion located in Box Elder County); Township 9 North Range 1 West (portion located in Box Elder County). Davis CountyUnclassifiable/Attainment. Salt Lake CountyUnclassifiable/Attainment. Tooele County (part)Unclassifiable/Attainment. The following Townships or portions thereof as noted (including Tooele City: Township 1 South Range 3 West; Township 2 South Range 3 West; Township 3 South Range 3 West; Township 3 South Range 4 West; Township 2 South Range 4 West; Township 2 South Range 5 West; Township 3 South Range 5 West; Township 3 South Range 6 West; Township 2 South Range 6 West; Township 1 South Range 6 West; Township 1 South Range 5 West; Township 1 South Range 4 West; Township 1 South Range 7 West; Township 2 South Range 7 West; Township 3 South Range 7 West; all Sections within Township 4 South Range 7 West except for Sections 29, 30, 31 and 32; Township 4 South Range 6 West; Township 4 South Range 5 West; Township 4 South Range 4 West; Township 4 South Range 3 West. Weber County (part)Unclassifiable/Attainment. The area of Weber County that lies west of the Wasatch Mountain Range with an eastern boundary for Weber County to be defined as the following Townships (or portion thereof) extending to the western boundary of Weber County: Township 5 North Range 1 West; Township 6 North Range 1 West; all Sections within Township 7 North Range 1 West located within Weber County except for Sections 1, 2, 3, 4, 11, 12, 13 and 24; Township 7 North Range 2 West (portion located in Weber County). Rest of State: Beaver CountyUnclassifiable/Attainment. Box Elder County (remainder)Unclassifiable/Attainment. Cache County (remainder)Unclassifiable/Attainment. Carbon CountyUnclassifiable/Attainment. Daggett CountyUnclassifiable/Attainment. Duchesne CountyUnclassifiable/Attainment. Emery CountyUnclassifiable/Attainment. Garfield CountyUnclassifiable/Attainment. Grand CountyUnclassifiable/Attainment. Iron CountyUnclassifiable/Attainment. Juab CountyUnclassifiable/Attainment. Kane CountyUnclassifiable/Attainment. Millard CountyUnclassifiable/Attainment. Morgan CountyUnclassifiable/Attainment. Piute CountyUnclassifiable/Attainment. Rich CountyUnclassifiable/Attainment. San Juan CountyUnclassifiable/Attainment. Sanpete CountyUnclassifiable/Attainment. Sevier CountyUnclassifiable/Attainment. Summit CountyUnclassifiable/Attainment. Tooele County (remainder)Unclassifiable/Attainment. Uintah CountyUnclassifiable/Attainment. Utah County (remainder)Unclassifiable/Attainment. Wasatch CountyUnclassifiable/Attainment. Washington CountyUnclassifiable/Attainment. Wayne CountyUnclassifiable/Attainment. Weber County (remainder)Unclassifiable/Attainment.

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

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

Utah—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation aClassification Date 1Type Date 2Type Logan, UT-ID: Cache County (part)June 18, 2021Attainment All portions of Cache County west of and including any portion of the following townships located within Utah: Township 15 North Range 1 East; Township 14 North Range 1 East; Township 13 North Range 1 East; Township 12 North Range 1 East; Township 11 North Range 1 East; Township 10 North Range 1 East; Township 9 North Range 1 East. Provo, UT: Utah County (part)Nonattainment6/9/17Serious. The area of Utah County that lies west of the Wasatch Mountain Range (and this includes the Cities of Provo and Orem) with an eastern boundary for Utah County to be defined as the following Townships: Township 3 South Range 1 East; Township 4 South Range 2 East; Township 5 South Range 3 East; Township 6 South Range 3 East; Township 7 South Range 3 East; Township 8 South Range 3 East; Township 9 South Range 3 East; Township 10 South Range 2 East Salt Lake City, UT: Box Elder County (part)Nonattainment6/9/17Serious. The following Townships or portions thereof as noted (including Brigham City): Township 7 North Range 2 West; Township 8 North Range 2 West; Township 9 North Range 2 West; Township 10 North Range 2 West; Township 11 North Range 2 West; Township 12 North Range 2 West; Township 13 North Range 2 West; Township 9 North Range 3 West; Township 10 North Range 3 West; Township 11 North Range 3 West; Township 12 North Range 3 West; Township 13 North Range 3 West; Township 13 North Range 4 West; Township 12 North Range 4 West; Township 11 North Range 4 West; Township 10 North Range 4 West; Township 9 North Range 4 West; Township 13 North Range 5 West; Township 12 North Range 5 West; Township 11 North Range 5 West; Township 10 North Range 5 West; Township 9 North Range 5 West; Township 13 North Range 6 West; Township 12 North Range 6 West; Township 11 North Range 6 West; Township 10 North Range 6 West; Township 9 North Range 6 West; Township 7 North Range 1 West (portion located in Box Elder County); Township 8 North Range 1 West (portion located in Box Elder County); Township 9 North Range 1 West (portion located in Box Elder County) Davis CountyNonattainment6/9/17Serious. Salt Lake CountyNonattainment6/9/17Serious. Tooele County (part)Nonattainment6/9/17Serious. The following Townships or portions thereof as noted (including Tooele City): Township 1 South Range 3 West; Township 2 South Range 3 West; Township 3 South Range 3 West; Township 3 South Range 4 West; Township 2 South Range 4 West; Township 2 South Range 5 West; Township 3 South Range 5 West; Township 3 South Range 6 West; Township 2 South Range 6 West; Township 1 South Range 6 West; Township 1 South Range 5 West; Township 1 South Range 4 West; Township 1 South Range 7 West; Township 2 South Range 7 West; Township 3 South Range 7 West; all Sections within Township 4 South Range 7 West except for Sections 29, 30, 31 and 32; Township 4 South Range 6 West; Township 4 South Range 5 West; Township 4 South Range 4 West; Township 4 South Range 3 West Weber County (part)Nonattainment6/9/17Serious. The area of Weber County that lies west of the Wasatch Mountain Range with an eastern boundary for Weber County to be defined as the following Townships (or portion thereof) extending to the western boundary of Weber County: Township 5 North Range 1 West; Township 6 North Range 1 West; all Sections within Township 7 North Range 1 West located within Weber County except for Sections 1, 2, 3, 4, 11, 12, 13 and 24; Township 7 North Range 2 West (portion located in Weber County) Rest of State: Beaver CountyUnclassifiable/Attainment Box Elder County (remainder)Unclassifiable/Attainment Cache County (remainder)Unclassifiable/Attainment Carbon CountyUnclassifiable/Attainment Daggett CountyUnclassifiable/Attainment Duchesne CountyUnclassifiable/Attainment Emery CountyUnclassifiable/Attainment Garfield CountyUnclassifiable/Attainment Grand CountyUnclassifiable/Attainment Iron CountyUnclassifiable/Attainment Juab CountyUnclassifiable/Attainment Kane CountyUnclassifiable/Attainment Millard CountyUnclassifiable/Attainment Morgan CountyUnclassifiable/Attainment Piute CountyUnclassifiable/Attainment Rich CountyUnclassifiable/Attainment San Juan CountyUnclassifiable/Attainment Sanpete CountyUnclassifiable/Attainment Sevier CountyUnclassifiable/Attainment Summit CountyUnclassifiable/Attainment Tooele County (remainder)Unclassifiable/Attainment Uintah CountyUnclassifiable/Attainment Utah County (remainder)Unclassifiable/Attainment Wasatch CountyUnclassifiable/Attainment Washington CountyUnclassifiable/Attainment Wayne CountyUnclassifiable/Attainment Weber County (remainder)Unclassifiable/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.

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

Utah—NO2 (1971 Annual Standard)

Designated area Does not meet primary standards Cannot be classified or better than national standards Entire StateX

Utah—NO2 (2010 1-Hour Standard)

Designated area Designation aDate 1Type Cache CountyUnclassifiable/Attainment. Davis CountyUnclassifiable/Attainment. Salt Lake CountyUnclassifiable/Attainment. Utah CountyUnclassifiable/Attainment. Weber CountyUnclassifiable/Attainment. Rest of StateUnclassifiable/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.

Utah—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation aCategory/classification Date 1Type Date 1Type Salt Lake City Area: Davis CountyUnclassifiable/Attainment Salt Lake CountyUnclassifiable/Attainment Rest of State:Unclassifiable/Attainment Beaver County Box Elder County Cache County Carbon County Daggett County Duchesne County Emery County Garfield County Grand County Iron County Juab County Kane County Millard County Morgan County Piute County Rich County San Juan County Sanpete County Sevier County Summit County Tooele County Uintah County Utah County Wasatch County Washington County Wayne County Weber 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.

Utah—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation Classification Date 1Type Date 1Type Uinta Basin, UT: 2Unclassifiable Duchesne County Uintah County Ute Indian Tribe of the Uintah & Ouray Reservation 3Rest of State and Rest of Indian CountryUnclassifiable/Attainment

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

2 Excludes Indian country located in each area, unless otherwise noted.

3 Includes Indian country of the tribe listed in this table located in the identified area. Information pertaining to areas of Indian country in this table is intended for CAA planning purposes only and is not an EPA determination of Indian country status or any Indian country boundary. EPA lacks the authority to establish Indian country land status, and is making no determination of Indian country boundaries, in this table.

Utah—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area 1Designation Classification Date 2Type Date 2Type Northern Wasatch Front, UTNonattainment11/7/22Moderate. Weber County (part): All portions of Weber County west of and including Townships 5, 6, and that portion of 7 North Range 1 West that are west of the ridgeline that traces the Wasatch Mountains from the southeast corner of the township to the easternmost extension of the county boundary within the township. Tooele County (part): In Tooele County, the following Townships or portions thereof as noted (including Tooele City): Township 1 South Range 3 West. Township 2 South Range 3 West. Township 3 South Range 3 West Township 3 South Range 4 West. Township 2 South Range 4 West. Township 2 South Range 5 West. Township 3 South Range 5 West. Township 3 South Range 6 West. Township 2 South Range 6 West. Township 1 South Range 6 West. Township 1 South Range 5 West. Township 1 South Range 4 West. Township 1 South Range 7 West. Township 2 South Range 7 West. Township 3 South Range 7 West. All Sections within Township 4 South Range 7 West except for Sections 29, 30, 31 and 32. Township 4 South Range 6 West. Township 4 South Range 5 West. Township 4 South Range 4 West. Township 4 South Range 3 West. Salt Lake County. Davis County. Southern Wasatch Front, UTNonattainmentMarginal. Utah County (part): All portions of Utah County west of and including any portion of the following townships located within Utah County: Township 3 South Range 1 East. Township 4 South Range 2 East. Township 5 South Range 3 East. Township 6 South Range 3 East. Township 7 South Range 3 East. Township 8 South Range 3 East. Township 9 South Range 3 East. Township 10 South Range 2 East. Uinta Basin, UT 3 48/03/22Nonattainment11/7/22Marginal. Duchesne County (part): All land in Duchesne County below a contiguous external perimeter of 6,250 ft. in elevation. All areas within that contiguous external perimeter are included in the nonattainment area—including mesas and buttes which may have an elevation greater than 6,250 ft., but which are surrounded on all sides by land lower than 6,250 ft. Additionally, areas that fall outside the 6,250 ft. contiguous external perimeter that have elevations less than 6,250 ft. are excluded from the nonattainment area. The boundary is defined by the 6,250 ft. contour line created from the 2013 USGS 10-meter seamless Digital Elevation Model (USGS NED n41w110 1/3 arc-second 2013 1 × 1 degree IMG). Uintah County (part): All land in Uintah County below a contiguous external perimeter of 6,250 ft. in elevation. All areas within that contiguous external perimeter are included in the nonattainment area—including mesas and buttes which may have an elevation greater than 6,250 ft., but which are surrounded on all sides by land lower than 6,250 ft. Additionally, areas that fall outside the 6,250 ft. contiguous external perimeter that have elevations less than 6,250 ft. are excluded from the nonattainment area. The boundary is defined by the 6,250 ft. contour line created from the 2013 USGS 10-meter seamless Digital Elevation Model (USGS NED n41w110 1/3 arc-second 2013 1 × 1 degree IMG). Beaver County1/16/18Attainment/Unclassifiable Box ElderAttainment/Unclassifiable Cache CountyAttainment/Unclassifiable Carbon CountyAttainment/Unclassifiable Daggett CountyAttainment/Unclassifiable Duchesne County (part) remainderAttainment/Unclassifiable Emery County1/16/18Attainment/Unclassifiable Garfield County1/16/18Attainment/Unclassifiable Grand CountyAttainment/Unclassifiable Iron County1/16/18Attainment/Unclassifiable Juab CountyAttainment/Unclassifiable Kane County1/16/18Attainment/Unclassifiable Millard County1/16/18Attainment/Unclassifiable Morgan CountyAttainment/Unclassifiable Piute County1/16/18Attainment/Unclassifiable Rich CountyAttainment/Unclassifiable San Juan County1/16/18Attainment/Unclassifiable Sanpete CountyAttainment/Unclassifiable Sevier County1/16/18Attainment/Unclassifiable Summit CountyAttainment/Unclassifiable Tooele County (part) remainderAttainment/Unclassifiable Uintah County (part) remainderAttainment/Unclassifiable Utah County (part) remainderAttainment/Unclassifiable Wasatch CountyAttainment/Unclassifiable Washington County1/16/18Attainment/Unclassifiable Wayne County1/16/18Attainment/Unclassifiable Weber County (part) remainderAttainment/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.

3 The EPA is designating portions of the Uinta Basin as “nonattainment,” including both Tribal and State lands. The Ute Tribe has air quality planning jurisdiction in the areas of Indian country included in the Uinta Basin nonattainment area, while the State of Utah has air quality planning jurisdiction in the areas of State land included in the Uinta Basin nonattainment area.

Utah—2008 Lead NAAQS

Designated area Designation for the 2008 NAAQS aDate 1Type 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 § 81.345, 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 81.345