{"data":{"id":"us/40-cfr-81.345","jurisdiction":"us","citation":"40 CFR 81.345","heading":"Utah.","body":"Utah—1971 Sulfur Dioxide NAAQS\n[Primary and Secondary]\nDesignated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards\nSalt Lake County 1 X 1 X\nPortions of Tooele County 1 X 1 X\nRest of State X\n1 EPA designation replaces State designation.\nUtah—2010 Sulfur Dioxide NAAQS\n[Primary]\nDesignated area 1 Designation\nDate 2 Type\nStatewide:\nBeaver County Attainment/Unclassifiable.\nBox Elder County Attainment/Unclassifiable.\nCache County Attainment/Unclassifiable.\nCarbon County Attainment/Unclassifiable.\nDaggett County Attainment/Unclassifiable.\nDavis County Attainment/Unclassifiable.\nDuchesne County Attainment/Unclassifiable.\nEmery County Attainment/Unclassifiable.\nGarfield County Attainment/Unclassifiable.\nGrand County Attainment/Unclassifiable.\nIron County Attainment/Unclassifiable.\nJuab County Attainment/Unclassifiable.\nKane County Attainment/Unclassifiable.\nMillard County Attainment/Unclassifiable.\nMorgan County Attainment/Unclassifiable.\nPiute County Attainment/Unclassifiable.\nRich County Attainment/Unclassifiable.\nSalt Lake County Attainment/Unclassifiable.\nSan Juan County Attainment/Unclassifiable.\nSanpete County Attainment/Unclassifiable.\nSevier County Attainment/Unclassifiable.\nSummit County Attainment/Unclassifiable.\nTooele County Attainment/Unclassifiable.\nUintah County Attainment/Unclassifiable.\nUtah County Attainment/Unclassifiable.\nWasatch County Attainment/Unclassifiable.\nWashington County Attainment/Unclassifiable.\nWayne County Attainment/Unclassifiable.\nWeber County Attainment/Unclassifiable.\n1 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.\n2 This date is April 9, 2018, unless otherwise noted.\nUtah—Carbon Monoxide\nDesignated Area Designation Classification\nDate 1 Type Date 1 Type\nOgden Area\nWeber County (part)\ncity of Ogden 5/8/2001 Attainment\nProvo Area\nUtah County (part) city of Provo 1/3/2006 Attainment\nSalt Lake City Area 3/22/1999 Attainment\nSalt Lake County (part), Salt Lake City\nRest of State Unclassifiable/Attainment\nBeaver County\nBox Elder County\nCache County\nCarbon County\nDaggett County\nDavis County\nDuchesne County\nEmery County\nGarfield County\nGrand County\nIron County\nJuab County\nKane County\nMillard County\nMorgan County\nPiute County\nRich County\nSalt Lake County (part)\nRemainder of Salt Lake County\nSan Juan County\nSanpete County\nSevier County\nSummit County\nTooele County\nUintah County\nUtah County (part)\nRemainder of Utah county\nWasatch County\nWashington County\nWayne County\nWeber County (part)\nRemainder of Weber county\n1 This date is November 15, 1990, unless otherwise noted.\nUtah—Ozone (1-Hour Standard)2\nDesignated area Designation Classification\nDate 1 Type Date 1 Type\nSalt Lake City Area:\nDavis County Attainment\nSalt Lake County Attainment\nRest of State Unclassifiable/Attainment\nBeaver County\nBox Elder County\nCache County\nCarbon County\nDaggett County\nDuchesne County\nEmery County\nGarfield County\nGrand County\nIron County\nJuab County\nKane County\nMillard County\nMorgan County\nPiute County\nRich County\nSan Juan County\nSanpete County\nSevier County\nSummit County\nTooele County\nUintah County\nUtah County\nWasatch County\nWashington County\nWayne County\nWeber County\n1 This date is October 18, 2000, unless otherwise noted.\n2 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.\nUtah—PM-10\nDesignated Area Designation Classification\nDate Type Date Type\nSalt Lake County 3/27/2020 Attainment\nUtah County 3/27/2020 Attainment\nOgden Area Weber County (part) City of Ogden 3/27/2020 Attainment\nRest of State 1 11/15/1990 Unclassifiable\n1 Denotes a single area designation for PSD baseline area purposes.\nUtah—1997 Annual PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designation a Classification\nDate 1 Type Date Type\nBox Elder County, UT (part):\nBox Elder County (except Brigham City) Unclassifiable/Attainment\nBrigham City, UT:\nBox Elder County (part) Unclassifiable/Attainment\nThe 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 2W\nCache County, UT (part):\nCache County (except Lower Cache Valley) Unclassifiable/Attainment\nDavis County, UT (part):\nDavis County (except Wasatch Front) Unclassifiable/Attainment\nGrantsville, UT:\nTooele County (part) Unclassifiable/Attainment\nThe 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 R4W\nLower Cache Valley, UT:\nCache County (part) Unclassifiable/Attainment\nThe 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 R1E\nSalt Lake County, UT (part):\nSalt Lake County (except Wasatch Front) Unclassifiable/Attainment\nTooele County, UT (part):\nTooele County (remainder) Unclassifiable/Attainment\nUtah County, UT (part):\nUtah County (except Wasatch Front) Unclassifiable/Attainment\nWasatch Front, UT:\nDavis County (part) Unclassifiable/Attainment\nThe 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.\nSalt Lake County (part) Unclassifiable/Attainment\nThe 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.\nUtah County (part) Unclassifiable/Attainment\nThe 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.\nWeber County (part) Unclassifiable/Attainment\nThe 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 R1W\nWeber County, UT (part):\nWeber County (except Wasatch Front) Unclassifiable/Attainment\nRest of State:\nBeaver County Unclassifiable/Attainment\nCarbon County Unclassifiable/Attainment\nDaggett County Unclassifiable/Attainment\nDuchesne County Unclassifiable/Attainment\nEmery County Unclassifiable/Attainment\nGarfield County Unclassifiable/Attainment\nGrand County Unclassifiable/Attainment\nIron County Unclassifiable/Attainment\nJuab County Unclassifiable/Attainment\nKane County Unclassifiable/Attainment\nMillard County Unclassifiable/Attainment\nMorgan County Unclassifiable/Attainment\nPiute County Unclassifiable/Attainment\nRich County Unclassifiable/Attainment\nSan Juan County Unclassifiable/Attainment\nSanpete County Unclassifiable/Attainment\nSevier County Unclassifiable/Attainment\nSummit County Unclassifiable/Attainment\nUintah County Unclassifiable/Attainment\nWasatch County Unclassifiable/Attainment\nWashington County Unclassifiable/Attainment\nWayne County Unclassifiable/Attainment\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is 90 days after January 5, 2005, unless otherwise noted.\nUtah—2012 Annual PM2.5 NAAQS\n[Primary]\nDesignated area 1 Designation Classification\nDate 2 Type Date 2 Type\nStatewide:\nBeaver County Unclassifiable/Attainment\nBox Elder County Unclassifiable/Attainment\nCache County Unclassifiable/Attainment\nCarbon County Unclassifiable/Attainment\nDaggett County Unclassifiable/Attainment\nDavis County Unclassifiable/Attainment\nDuchesne County Unclassifiable/Attainment\nEmery County Unclassifiable/Attainment\nGarfield County Unclassifiable/Attainment\nGrand County Unclassifiable/Attainment\nIron County Unclassifiable/Attainment\nJuab County Unclassifiable/Attainment\nKane County Unclassifiable/Attainment\nMillard County Unclassifiable/Attainment\nMorgan County Unclassifiable/Attainment\nPiute County Unclassifiable/Attainment\nRich County Unclassifiable/Attainment\nSalt Lake County Unclassifiable/Attainment\nSan Juan County Unclassifiable/Attainment\nSanpete County Unclassifiable/Attainment\nSevier County Unclassifiable/Attainment\nSummit County Unclassifiable/Attainment\nTooele County Unclassifiable/Attainment\nUintah County Unclassifiable/Attainment\nUtah County Unclassifiable/Attainment\nWasatch County Unclassifiable/Attainment\nWashington County Unclassifiable/Attainment\nWayne County Unclassifiable/Attainment\nWeber County Unclassifiable/Attainment\n1 Includes areas of Indian country located in each county or area, except as otherwise specified.\n2 This date is April 15, 2015, unless otherwise noted.\nUtah—1997 24-Hour PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designation a Classification\nDate 1 Type Date Type\nLogan, UT-ID:\nCache County (part) Unclassifiable/Attainment.\nAll 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.\nProvo, UT:\nUtah County (part) Unclassifiable/Attainment.\nThe 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.\nSalt Lake City, UT:\nBox Elder County (part) Unclassifiable/Attainment.\nThe 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).\nDavis County Unclassifiable/Attainment.\nSalt Lake County Unclassifiable/Attainment.\nTooele County (part) Unclassifiable/Attainment.\nThe 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.\nWeber County (part) Unclassifiable/Attainment.\nThe 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).\nRest of State:\nBeaver County Unclassifiable/Attainment.\nBox Elder County (remainder) Unclassifiable/Attainment.\nCache County (remainder) Unclassifiable/Attainment.\nCarbon County Unclassifiable/Attainment.\nDaggett County Unclassifiable/Attainment.\nDuchesne County Unclassifiable/Attainment.\nEmery County Unclassifiable/Attainment.\nGarfield County Unclassifiable/Attainment.\nGrand County Unclassifiable/Attainment.\nIron County Unclassifiable/Attainment.\nJuab County Unclassifiable/Attainment.\nKane County Unclassifiable/Attainment.\nMillard County Unclassifiable/Attainment.\nMorgan County Unclassifiable/Attainment.\nPiute County Unclassifiable/Attainment.\nRich County Unclassifiable/Attainment.\nSan Juan County Unclassifiable/Attainment.\nSanpete County Unclassifiable/Attainment.\nSevier County Unclassifiable/Attainment.\nSummit County Unclassifiable/Attainment.\nTooele County (remainder) Unclassifiable/Attainment.\nUintah County Unclassifiable/Attainment.\nUtah County (remainder) Unclassifiable/Attainment.\nWasatch County Unclassifiable/Attainment.\nWashington County Unclassifiable/Attainment.\nWayne County Unclassifiable/Attainment.\nWeber County (remainder) Unclassifiable/Attainment.\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is 90 days after January 5, 2005, unless otherwise noted.\nUtah—2006 24-Hour PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designation a Classification\nDate 1 Type Date 2 Type\nLogan, UT-ID:\nCache County (part) June 18, 2021 Attainment\nAll portions of Cache County west of and including any portion of the following townships located within Utah:\nTownship 15 North Range 1 East;\nTownship 14 North Range 1 East;\nTownship 13 North Range 1 East;\nTownship 12 North Range 1 East;\nTownship 11 North Range 1 East;\nTownship 10 North Range 1 East;\nTownship 9 North Range 1 East.\nProvo, UT:\nUtah County (part) 12/19/2025 Attainment.\nThe 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\nSalt Lake City, UT:\nBox Elder County (part) 12/19/2025 Attainment\nThe 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).\nDavis County 12/19/2025 Attainment.\nSalt Lake County 12/19/2025 Attainment.\nTooele County (part) 12/19/2025 Attainment.\nThe 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.\nWeber County (part) 12/19/2025 Attainment.\nThe 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).\nRest of State:\nBeaver County Unclassifiable/Attainment\nBox Elder County (remainder) Unclassifiable/Attainment\nCache County (remainder) Unclassifiable/Attainment\nCarbon County Unclassifiable/Attainment\nDaggett County Unclassifiable/Attainment\nDuchesne County Unclassifiable/Attainment\nEmery County Unclassifiable/Attainment\nGarfield County Unclassifiable/Attainment\nGrand County Unclassifiable/Attainment\nIron County Unclassifiable/Attainment\nJuab County Unclassifiable/Attainment\nKane County Unclassifiable/Attainment\nMillard County Unclassifiable/Attainment\nMorgan County Unclassifiable/Attainment\nPiute County Unclassifiable/Attainment\nRich County Unclassifiable/Attainment\nSan Juan County Unclassifiable/Attainment\nSanpete County Unclassifiable/Attainment\nSevier County Unclassifiable/Attainment\nSummit County Unclassifiable/Attainment\nTooele County (remainder) Unclassifiable/Attainment\nUintah County Unclassifiable/Attainment\nUtah County (remainder) Unclassifiable/Attainment\nWasatch County Unclassifiable/Attainment\nWashington County Unclassifiable/Attainment\nWayne County Unclassifiable/Attainment\nWeber County (remainder) Unclassifiable/Attainment\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is 30 days after November 13, 2009, unless otherwise noted.\n2 This date is July 2, 2034, unless otherwise noted.\nUtah—NO2 (1971 Annual Standard)\nDesignated area Does not meet primary standards Cannot be classified or better than national standards\nEntire State X\nUtah—NO2 (2010 1-Hour Standard)\nDesignated area Designation a\nDate 1 Type\nCache County Unclassifiable/Attainment.\nDavis County Unclassifiable/Attainment.\nSalt Lake County Unclassifiable/Attainment.\nUtah County Unclassifiable/Attainment.\nWeber County Unclassifiable/Attainment.\nRest of State Unclassifiable/Attainment.\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is 90 days after October 31, 2011, unless otherwise noted.\nUtah—1997 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area Designation a Category/classification\nDate 1 Type Date 1 Type\nSalt Lake City Area:\nDavis County Unclassifiable/Attainment\nSalt Lake County Unclassifiable/Attainment\nRest of State: Unclassifiable/Attainment\nBeaver County\nBox Elder County\nCache County\nCarbon County\nDaggett County\nDuchesne County\nEmery County\nGarfield County\nGrand County\nIron County\nJuab County\nKane County\nMillard County\nMorgan County\nPiute County\nRich County\nSan Juan County\nSanpete County\nSevier County\nSummit County\nTooele County\nUintah County\nUtah County\nWasatch County\nWashington County\nWayne County\nWeber County\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is June 15, 2004, unless otherwise noted.\nUtah—2008 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area Designation Classification\nDate 1 Type Date 1 Type\nUinta Basin, UT: 2 Unclassifiable\nDuchesne County\nUintah County\nUte Indian Tribe of the Uintah \u0026 Ouray Reservation 3\nRest of State and Rest of Indian Country Unclassifiable/Attainment\n1 This date is July 20, 2012, unless otherwise noted.\n2 Excludes Indian country located in each area, unless otherwise noted.\n3 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.\nUtah—2015 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area 1 Designation Classification\nDate 2 Type Date 2 Type\nNorthern Wasatch Front, UT Nonattainment February 5, 2026 Moderate.\nDavis County.\nSalt Lake County.\nTooele County (part):\nIn Tooele County, the following Townships or portions thereof as noted (including Tooele City):\nTownship 1 North Range 6 West.\nTownship 1 North Range 7 West.\nTownship 1 North Range 8 West.\nTownship 2 North Range 6 West.\nTownship 2 North Range 7 West.\nTownship 2 North Range 8 West.\nTownship 3 North Range 7 West.\nTownship 3 North Range 8 West.\nTownship 1 South Range 3 West.\nTownship 1 South Range 4 West.\nTownship 1 South Range 5 West.\nTownship 1 South Range 6 West.\nTownship 1 South Range 7 West.\nTownship 1 South Range 8 West.\nTownship 2 South Range 3 West.\nTownship 2 South Range 4 West.\nTownship 2 South Range 5 West.\nTownship 2 South Range 6 West.\nTownship 2 South Range 7 West.\nTownship 2 South Range 8 West.\nTownship 3 South Range 3 West.\nTownship 3 South Range 4 West.\nTownship 3 South Range 5 West.\nTownship 3 South Range 6 West.\nTownship 3 South Range 7 West.\nTownship 3 South Range 8 West.\nTownship 4 South Range 3 West.\nTownship 4 South Range 4 West.\nTownship 4 South Range 5 West.\nTownship 4 South Range 6 West.\nAll sections within Township 4 South Range 7 West except for section 31.\nTownship 4 South Range 8 West.\nWeber County (part):\nAll 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.\nSouthern Wasatch Front, UT Nonattainment Marginal.\nUtah County (part):\nAll portions of Utah County west of and including any portion of the following townships located within Utah County:\nTownship 3 South Range 1 East.\nTownship 4 South Range 2 East.\nTownship 5 South Range 3 East.\nTownship 6 South Range 3 East.\nTownship 7 South Range 3 East.\nTownship 8 South Range 3 East.\nTownship 9 South Range 3 East.\nTownship 10 South Range 2 East.\nUinta Basin, UT 3 Nonattainment January 15, 2025 Moderate.\nDuchesne 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 n41w1101/3 arc-second 2013 1 × 1 degree IMG).\nUintah 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 n41w1101/3 arc-second 2013 1 x 1 degree IMG).\nBeaver County 1/16/2018 Attainment/Unclassifiable\nBox Elder Attainment/Unclassifiable\nCache County Attainment/Unclassifiable\nCarbon County Attainment/Unclassifiable\nDaggett County Attainment/Unclassifiable\nDuchesne County (part) remainder Attainment/Unclassifiable\nEmery County 1/16/2018 Attainment/Unclassifiable\nGarfield County 1/16/2018 Attainment/Unclassifiable\nGrand County Attainment/Unclassifiable\nIron County 1/16/2018 Attainment/Unclassifiable\nJuab County Attainment/Unclassifiable\nKane County 1/16/2018 Attainment/Unclassifiable\nMillard County 1/16/2018 Attainment/Unclassifiable\nMorgan County Attainment/Unclassifiable\nPiute County 1/16/2018 Attainment/Unclassifiable\nRich County Attainment/Unclassifiable\nSan Juan County 1/16/2018 Attainment/Unclassifiable\nSanpete County Attainment/Unclassifiable\nSevier County 1/16/2018 Attainment/Unclassifiable\nSummit County Attainment/Unclassifiable\nTooele County (part) remainder Attainment/Unclassifiable\nUintah County (part) remainder Attainment/Unclassifiable\nUtah County (part) remainder Attainment/Unclassifiable\nWasatch County Attainment/Unclassifiable\nWashington County 1/16/2018 Attainment/Unclassifiable\nWayne County 1/16/2018 Attainment/Unclassifiable\nWeber County (part) remainder Attainment/Unclassifiable\n1 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.\n2 This date is August 3, 2018, unless otherwise noted.\n3 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.\nUtah—2008 Lead NAAQS\nDesignated area Designation for the 2008 NAAQS a\nDate 1 Type\nWhole State Unclassifiable/Attainment.\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 December 31, 2011 unless otherwise noted.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 81—DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES","Subpart C—Section 107 Attainment Status Designations"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"6908a7d7639253bdd994ed47ffb8342c1ca4619015314e32f69fc3c2e931c84d","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-81.344","next":"us/40-cfr-81.346"},"notice":"GroundRules: Original legal text. Not legal advice."}