§ 52.320 Identification of plan.
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Title 40—Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS > PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS > Subpart G—Colorado
Text
(a) Purpose and scope. This section sets forth the applicable State Implementation Plan for Colorado under section 110 of the Clean Air Act, 42 U.S.C. 7410 and 40 CFR part 51 to meet national ambient air quality standards or other requirements under the Clean Air Act.
(b) Incorporation by reference. (1) Material listed in paragraphs (c) and (d) of this section with an EPA approval date prior to June 1, 2015, was approved for incorporation by reference by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Material is incorporated as submitted by the state to EPA, and notice of any change in the material will be published in the Federal Register. Entries for paragraphs (c) and (d) of this section with EPA approval dates after June 1, 2015, will be incorporated by reference in the next update to the SIP compilation.
(2) EPA Region 8 certifies that the rules/regulations provided by EPA in the SIP compilation at the addresses in paragraph (b)(3) of this section are an exact duplicate of the officially promulgated state rules/regulations which have been approved as part of the State Implementation Plan as of June 1, 2015.
(3) Copies of the materials incorporated by reference may be inspected at the Environmental Protection Agency, Region 8, 1595 Wynkoop Street, Denver, Colorado, 80202-1129; Air and Radiation Docket and Information Center, U.S. Environmental Protection Agency, West Building, 1301 Constitution Ave. NW., Washington, DC 20460; and, the National Archives and Records Administration (NARA). For information on the availability of materials from the docket in the EPA Headquarters Library, please call the Office of Air and Radiation (OAR) at (202) 566-1742. For information on the availability of this material at NARA, call (202) 741-6030, or go to http://www.archives.gov/federal-register/cfr/ibr-locations.html. Copies of the Colorado regulations we have approved are also available at http://www.epa.gov/region8/air/sip.html.
(c) EPA-approved regulations.
Title
State effective date
EPA Effective date
Final rule citation/date
Comments
5 CCR 1001-01, Procedural Rules
State Implementation Plan
9/14/2021
2/2/2026
90 FR 41, 1/2/2026
Includes revised numbering format and grammatical change.
5 CCR 1001-02, Common Provisions Regulation
I. Definitions, Statement of Intent, and General Provisions Applicable to all Emission Control Regulations adopted by the Colorado Air Quality Control Commission
12/15/2021
2/2/2026
90 FR 41, 1/2/2026
Revisions were made to I.A., replaces the word “section” with “§ ”, and updates how copies of materials incorporated by reference may be obtained. Except I.G. Definitions, “Construction” and “Day”
II. General
2/14/2023
1/27/2025
89 FR 105461, 12/27/2025
Previous SIP approval 1/25/2016 except for II.I. and II.J.5. Substantive changes removing II.E. and II.J. approved 12/27/2025.
5 CCR 1001-03, Regulation Number 1, Emission Control for Particulate Matter, Smoke, Carbon Monoxide, and Sulfur Oxides
Definitions
10/2/2005
2/17/2012
77 FR 2466, 1/18/2012
I. Applicability: Referenced Federal Regulations
10/2/2005
2/17/2012
77 FR 2466, 1/18/2012
II. Smoke and Opacity
10/2/2005
2/17/2012
77 FR 2466, 1/18/2012
III. Particulate Matter
10/2/2005
2/17/2012
77 FR 2466, 1/18/2012
IV. Continuous Emission Monitoring Requirements for New or Existing Sources
10/2/2005
2/17/2012
77 FR 2466, 1/18/2012
V. Emission Standards for Existing Iron and Steel Plant Operations
10/2/2005
2/17/2012
77 FR 2466, 1/18/2012
VI. Sulfur Dioxide Emission Regulations
10/2/2005
2/17/2012
77 FR 2466, 1/18/2012
VII. Emission Regulations for Certain Electric Generating Stations Owned and Operated by the Public Service Company of Colorado
10/2/2005
2/17/2012
77 FR 2466, 1/18/2012
VIII. Restrictions on the Use of Oil as a Backup Fuel
10/2/2005
2/17/2012
77 FR 2466, 1/18/2012
IX. Emission Regulations Concerning Areas Which Are Nonattainment for Carbon Monoxide—Refinery Fluid Bed Catalytic Cracking Units:
10/2/2005
2/17/2012
77 FR 2466, 1/18/2012
Appendix A, Method of Measuring Opacity from Fugitive Particulate Emission Sources
5/30/1982
1/2/1987
51 FR 43609, 12/3/1986
Appendix B, Method of Measurement of Off-Property Transport of Fugitive Particulate Emissions
5/30/1982
1/2/1987
51 FR 43609, 12/3/1986
5 CCR 1001-05, Regulation Number 3, Part A, Concerning General Provisions Applicable to Reporting and Permitting
I. Applicability
2/14/2023
8/21/2024
89 FR 59000, 7/22/2024
II. Air Pollution Emission Notice (APEN) Requirements
2/14/2023
8/21/2024
89 FR 59000, 7/22/2024
III. Administrative Permit Amendment Procedures
4/30/2008
3/17/2014
79 FR 8632, 2/13/2014
IV. Operational Flexibility
4/30/2008
3/17/2014
79 FR 8632, 2/13/2014
V. Certification and Trading of Emission Reduction Credits Offset and Netting Transactions
10/15/2014
6/3/2019
84 FR 18991, 5/3/2019
VI. Fees
11/30/2018
10/16/2020
85 FR 57696, 9/16/2020
VII. Confidential Information or Data Contained in Air Pollutant Emission Notices, Permit Applications, or Reports Submitted Pursuant to Part C, Section V.C.6
4/30/2008
3/17/2014
79 FR 8632, 2/13/2014
VIII. Technical Modeling and Monitoring Requirements
12/15/2010
2/24/2016
81 FR 3963, 1/25/2016
Appendix A, Method for Determining De Minimis Levels For Non-Criteria Reportable Pollutants
10/15/2014
11/13/2017
82 FR 47380, 10/12/2017
Appendix B, Non-criteria Reportable Pollutants (Sorted by BIN)
12/15/20102/15/2013
2/24/2016
81 FR 3963, 1/25/2016
5 CCR 1001-05, Regulation Number 3, Part B, Concerning Construction Permits
I. Applicability
4/30/2008
3/17/2014
79 FR 8632, 2/13/2014
II. General Requirements for Construction Permits
2/14/2020
12/22/2022
87 FR 71258, 11/22/2022
III. Construction Permit Review Procedures
2/14/2021
4/26/2023
88 FR 18054, 3/27/2023
5 CCR 1001-05, Regulation Number 3, Part D, Concerning Major Stationary Source New Source Review and Prevention of Significant Deterioration
I. Applicability
10/15/2014
6/3/2019
84 FR 18991, 5/3/2019
II. Definitions
2/14/2021
4/26/2023
88 FR 18054, 3/27/2023
III. Permit Review Procedures
12/15/2011
2/24/2016
81 FR 3963, 1/25/2016
IV. Public Comment and Hearing Requirements
2/14/2021
4/26/2023
88 FR 18054, 3/27/2023
V. Requirements Applicable to Nonattainment Areas
10/15/2014
6/3/2019
84 FR 18991, 5/3/2019
VI. Requirements applicable to attainment and unclassifiable areas and pollutants implemented under Section 110 of the Federal Act (Prevention of Significant Deterioration Program)
10/15/2014
6/3/2019
84 FR 18991, 5/3/2019
VII. Negligibly Reactive Volatile Organic Compounds (NRVOCs)
4/30/2008
3/17/2014
79 FR 8632, 2/13/2014
VIII. Area Classifications
4/30/2008
3/17/2014
79 FR 8632, 2/13/2014
IX. Redesignation
4/30/2008
3/17/2014
79 FR 8632, 2/13/2014
X. Air Quality Limitations
12/15/2011
2/24/2016
81 FR 3963, 1/25/2016
XI. Exclusions From Increment Consumption
4/30/2008
3/17/2014
79 FR 8632, 2/13/2014
XII. Innovative Control Technology
4/30/2008
3/17/2014
79 FR 8632, 2/13/2014
XIII. Federal Class I Areas
12/15/2011
2/24/2016
81 FR 3963, 1/25/2016
XIV. Visibility
12/15/2010
2/24/2016
81 FR 3963, 1/25/2016
XV. Actual PALs
10/15/2014
6/3/2019
84 FR 18991, 5/3/2019
5 CCR 1001-05, Regulation Number 3, Part F, Regional Haze Limits—Best Available Retrofit Technology (BART) and Reasonable Progress (RP)
VI. Regional Haze Determinations
2/14/2017
8/6/2018
83 FR 31332, 7/5/2018
VII. Monitoring, Recordkeeping, and Reporting for Regional Haze Limits
2/14/2011
1/30/2013
77 FR 76871, 12/31/2012
5 CCR 1001-06, Regulation Number 4, Sale and Installation of Wood-Burning Appliances and Use of Certain Wood Burning Appliances During High Pollution Days
I. Definitions
1/14/2016
8/16/2019
84 FR 34063, 7/17/2019
Previous SIP approval 4/17/1997.
II. Limitation on the Sale and Installation of Wood-Burning Stoves
4/30/2017
8/16/2019
84 FR 34063, 7/17/2019
Previous SIP approval 4/17/1997.
III. Approval Procedure for Pellet Stoves
1/14/2016
8/16/2019
84 FR 34063, 7/17/2019
Previous SIP approval 4/17/1997.
V. Enforcement
1/14/2016
8/16/2019
84 FR 34063, 7/17/2019
Previous SIP approval 4/17/1997.
VI. List of Approved-Wood Burning Appliances
1/14/2016
8/16/2019
84 FR 34063, 7/17/2019
Previous SIP approval 4/17/1997.
VII. High Pollution Days
1/14/2016
8/16/2019
84 FR 34063, 7/17/2019
Previous SIP approval 4/17/1997.
VIII. Requirements for Installation of Fireplaces
4/30/2017
8/16/2019
84 FR 34063, 7/17/2019
Previous SIP approval 4/17/1997.
IX. Implementation of Local Controls
1/14/2016
8/16/2019
84 FR 34063, 7/17/2019
Previous SIP approval 4/17/1997.
X. References
1/14/2016
8/16/2019
84 FR 34063, 7/17/2019
Previous SIP approval 4/17/1997.
5 CCR 1001-08, Regulation Number 6, Standards of Performance for New Stationary Sources
IV. Standards of Performance for New Sources of Sulfur Dioxide
3/30/1981
1/6/1982
46 FR 59536, 12/7/1981
5 CCR 1001-09, Regulation Number 7, Control of Ozone Via Ozone Precursors and Hydrocarbons via Oil and Gas Emissions, (Emissions of Volatile Organic Compounds and Nitrogen Oxides), Part A, Applicability and General Provisions
I. Applicability
2/14/2023
5/11/2026
91 FR 17857, 4/9/2026
State-only provisions excluded. Previous SIP approval 8/5/11. Nonsubstantive changes approved 7/3/2018, 2/24/2021, and 11/5/2021. Revisions to I.A.1.a., I.B.2.a.(iii), I.B.2.d., and I.B.2.d.(iii)-(iv) excluded from approval dated 4/9/2026 insofar as related to northern Weld County. Revisions to I.A.1.c., I.B.1.a., I.B.1.c., I.B.1.d., I.B.2.h. and I.B.2.i. excluded from approval dated 4/9/2026.
II. General Provisions
2/14/2023
5/11/2026
91 FR 17857, 4/9/2026
State-only provisions excluded. Previous SIP approval 8/5/11. Nonsubstantive changes approved 2/24/2021 and 11/5/2021. Appendix A excluded.
5 CCR 1001-09, Regulation Number 7, Control of Ozone Via Ozone Precursors and Hydrocarbons via Oil and Gas Emissions, (Emissions of Volatile Organic Compounds and Nitrogen Oxides), Part B, Storage, Transfer, and Disposal of Volatile Organic Compounds and Petroleum Liquids and Petroleum Processing and Refining
I. General Requirements for Storage and Transfer of Volatile Organic Compounds
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 8/5/2011. nonsubstantive changes approved 2/24/2021 and 11/5/2021.
II. Storage of Highly Volatile Organic Compounds
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 8/5/2011. nonsubstantive changes approved 11/5/2021.
III. Disposal of Volatile Organic Compounds
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approvals 8/5/2011 and 2/24/2021; nonsubstantive changes approved 11/5/2021.
IV. Storage and Transfer of Petroleum Liquid
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 8/5/2011; nonsubstantive changes to approved 7/3/2018 and 2/24/201. Substantive changes approved 11/5/2021.
V. Crude Oil
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 8/5/2011; nonsubstantive approved 7/3/2018, 2/24/2021, and 11/5/2021.
VI. Petroleum Processing and Refining
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 8/5/2011; nonsubstantive changes approved 7/3/2018, 2/24/2021, and 11/5/2021.
VII. Control of Volatile Organic Compound Leaks from Vapor Collection Systems and Vapor Control Systems Located at Gasoline Terminals, Gasoline Bulk Plants, and Gasoline Dispensing Facilities
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 8/5/2011; nonsubstantive changes approved 2/24/2021, substantive changes made to VII.-VII.B.2.b approved 11/5/2021.
Appendix B Criteria for Control of Vapors from Gasoline Transfer to Storage Tanks
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous approval 5/30/95. Substantive changes approved 11/5/2021
Appendix C Criteria for Control of Vapors from Gasoline Transfer at Bulk Plants
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous approval 3/13/81. Nonsubstantive changes approved 11/5/2021.
5 CCR 1001-09, Regulation Number 7, Control of Ozone Via Ozone Precursors and Hydrocarbons via Oil and Gas Emissions, (Emissions of Volatile Organic Compounds and Nitrogen Oxides), Part C, Surface Coating, Solvents, Asphalt, Graphic Arts and Printing, and Pharmaceuticals
I. Surface Coating Operations
6/14/2023
5/11/2026
91 FR 17857, 4/9/2026
Previous SIP approval 8/5/2011; nonsubstantive changes approved 7/3/2018; substantive changes approved 2/24/2021; nonsubstantive changes approved 11/5/2021. Substantive changes limited approval/disapproval 5/9/2023. Revisions to I.L.4.b., I.L.4.d., I.N.7. and I.O.2. excluded from approval dated 4/9/2026.
II. Solvent Use
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 8/5/2011; substantive changes approved 2/24/2021 and 11/5/2021.
III. Use of Cutback Asphalt
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 8/5/2011; nonsubstantive changes approved 2/24/2021 and 11/5/2021.
IV. Graphic Arts and Printing
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 8/5/2011. Substantive changes made in 7/3/2018 rulemaking. IBR correction approved 2/24/2021. Nonsubstantive changes approved 11/5/2021.
V. Pharmaceutical Synthesis
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 8/5/2011;, nonsubstantive changes approved 2/24/2021 and 86 FR 61071.
Appendix D Minimum Cooling Capacities for Refrigerated Freeboard Chillers on Vapor Degreasers
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 5/30/95. Nonsubstantive changes approved 11/5/2021.
Appendix E Emissions Limit Conversion Procedure
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Previous SIP approval 5/30/95. Nonsubstantive changes approved 11/5/2021.
5 CCR 1001-09, Regulation Number 7, Control of Ozone Via Ozone Precursors and Hydrocarbons via Oil and Gas Emissions, (Emissions of Volatile Organic Compounds and Nitrogen Oxides), Part D, Oil and Natural Gas Operations
I. Volatile Organic Compound Emissions from Oil and Gas Operations
1/30/2022
6/8/2023
88 FR 29827, 5/9/2023
Previous SIP approval 2/13/2008. Substantive changes to section XII; state-only provisions excluded, approved 7/3/2018. Substantive changes approved 11/25/2021 except no action on sections I.D., I.E., I.F. and I.J.1. Conditional approval of sections I.D., I.E., I.F., and I.J.1. 5/13/2022. Limited approval/disapproval section I.D., I.E., I.F., and I.J.1 5/9/2023.
II. Statewide Controls for Oil and Gas Operations
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
Substantive changes to II.C., II.C.1., II.C.1.b.(ii)-(B), and II.F approved 11/5/2021.
III. Natural Gas-Actuated Pneumatic Controllers Associated with Oil and Gas Operations
2/14/2020
6/8/2023
88 FR 29827, 5/9/2023
Substantive changes to III.-III.B.3., III.B.5., III.B.7.-III.C.2.c.(ii), III.D.-III.D.2.b., III.D.3.b., and III.E.-III.E.2.c. approved 11/5/2021. Revisions to definitions for pneumatic controls approved 5/9/2-23.
IV. Control of Emissions from Breweries in the 8-hour Ozone Control Area
2/14/2020
12/6/2021
86 FR 61071, 11/5/2021
New section approved in SIP 2/24/2021. Nonsubstantive changes approved 11/5/2021.
5 CCR 1001-12, Regulation Number 10, Criteria for Analysis of Transportation Conformity
I. Requirement to Comply with the Federal Rule
1/30/2012
4/3/2014
79 FR 12079, 3/4/2014
II. Definitions
3/30/2016
5/7/2018
83 FR 14757, 4/6/2018
III. Interagency Consultation
3/30/2016
5/7/2018
83 FR 14757, 4/6/2018
IV. Emission reduction credit for certain control measures
1/30/2012
4/3/2014
79 FR 12079, 3/4/2014
V. Enforceability of design concept and scope and project-level mitigation and control measures
1/30/2012
4/3/2014
79 FR 12079, 3/4/2014
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part A, General Provisions, Area of Applicability, Schedules for Obtaining Certification of Emissions Control, Definitions, Exemptions, and Clean Screening/Remote Sensing
I. Applicability
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
II. Definitions
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
III. Exemption from Section 42-4-314, C.R.S. for Department of Defense Personnel Participating in the Privately Owned Vehicle Import Control Program
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
IV. Clean Screen/Remote Emissions Sensing
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
V. Expansion of the Enhanced Emissions Program to the North Front Range Area
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part B, Standards and Procedures for the Approval, Operation, Gas Span Adjustment, Calibration and Certification of the Division Approved Test Analyzer Systems for Use in the Basic and Enhanced Areas and Test Analyzer Systems for Licensed Dealers in the Enhanced Area
I. Approval of the Colo '94 Test Analyzer Systems
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
II. Application for Approval of Colo '94 Test Analyzer Systems Equipment Manufacturers
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
III. Performance and Design Specification for the Colo '94 Exhaust Gas Analyzers
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
IV. Span Gases For Use With Colorado 94 and Colorado 97 Test Analyzer Systems
11/30/2014
3/11/2019
84 FR 2449, 2/7/2019
V. Documentation, Logistics, and Warranty Requirements
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
VI. Calibration of Colorado '94 Test Analyzer Systems
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
VII. Approval of the Colorado Automobile Dealers Transient Mode Test Analyzer System
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
VIII. Applications for Approval of the Colorado Automobile Dealers Transient Mode Test Analyzer System
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
IX. Approval of the Colorado On-Board Diagnostic (OBD) Test Analyzer System
2/15/2013
11/21/2016
81 FR 72720, 10/21/2016
X. The Colorado On-Board Diagnostics (OBD) Test Analyzer System
2/15/2013
11/21/2016
81 FR 72720, 10/21/2016
XI. Requests for Approval of Clean Screen Test Analyzer Systems
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part C, Inspection Procedures and Requirements for Exhaust Emissions, Fuel Evaporation Control, Visible Smoke Emissions, Emissions Control Systems, On-Board Diagnostics (OBD); and Practices to Ensure Proper Emissions Related Adjustments and Repairs
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part C, Inspection Procedures and Requirements for Exhaust Emissions, Fuel Evaporation Control, Visible Smoke Emissions, Emissions Control Systems, On-Board Diagnostics (OBD); and Practices to Ensure Proper Emissions Related Adjustments and Repairs
I. Pre-inspection Requirements
2/15/2013
11/21/2016
81 FR 72720, 10/21/2016
II. Exhaust Emissions Inspection Procedures
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
III. Emissions Control Systems Inspection Procedures
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
IV. On-Board Diagnostic II Inspection Procedures
2/15/2013
11/21/2016
81 FR 72720, 10/21/2016
V. Evaporative Fuel Control Inspection Procedures
2/15/2013
11/21/2016
81 FR 72720, 10/21/2016
VI. Free Reinspection
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
VII. Repair Information
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
VIII. Certification of Emissions Control
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
IX. [Reserved]
X. Emissions Related Repairs
11/30/2014
3/11/2019
84 FR 2449, 2/7/2019
XI. Engine Changes
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
XII. Clean Screen Inspection Program
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part D, Qualification and Licensing of Emissions Mechanics, Emissions Inspectors and Clean Screen Inspectors; Licensing of Emissions Inspection and Readjustment Stations, Inspection-Only Stations, Inspection-Only Facilities, Fleets, Motor Vehicle Dealer Test Facilities and Enhanced Inspection Centers; Qualification of Clean Screen Inspection Sites; and Registration of Emissions Related Repair Facilities and Technicians
I. Licensing of Emissions Inspection and Readjustment Stations, Inspection-Only Stations, Inspection-Only Facilities, Enhanced Inspection Centers, Fleet Inspection Stations and Motor Vehicle Dealer Test Facilities
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
II. Qualification and Licensing of Emission Mechanics, and Emissions Inspectors
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
III. Registration of Emissions Related Repair Facilities
10/15/2021
12/18/2025
90 FR 51515, 11/18/2025
IV. Requirements for Clean Screen/Remote Sensing Sites
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
V. Qualification of Clean Screen Emissions Inspectors
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
VI. Requalification Requirements for all Clean Screen Emissions Inspectors
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
VII. Transmittal of Letters of Qualification and Issuance of Clean Screen Inspector Licenses
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
VIII. Lapse of Certificate of Qualification for Clean Screen Inspector
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
IX. Program License Application Performance Review Criteria
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part E, Prohibited Acts and Penalties to Ensure Proper Inspection Procedures, Adherence to Prescribed Procedures and Effective Emissions Related Repairs
I. The Grounds Upon Which The License Of An Emissions Mechanic, Emissions Inspector Or Any Type Of AIR Program Inspection Business May Be Suspended, For A Period Of Time Not Less Than Six Months, Or Revoked
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part F, Maximum Allowable Emissions Limits for Motor Vehicle Exhaust, Evaporative and Visible Emissions for Light-Duty and Heavy-Duty Vehicles
I. The Idle Short Test Concentration Limits For Light-Duty Vehicles And Heavy-Duty Trucks Specified In Sections I (A) And II (A) Respectively Of This Part F Are Those Necessary To Comply With Emissions Reductions As The Program Matures
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
II. Heavy-Duty Vehicles (1978 and Earlier Greater Than 6000 lbs. GVWR) Subject to Idle Short Test(s)
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
III. Transient Test Mass Emissions Limits In Grams/Mile (GPM)
1/30/2006
1/22/2013
77 FR 75388, 12/20/2012
IV. Evaporative Emissions Control Standards
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
V. Visible Smoke
2/15/2013
11/21/2016
81 FR 72720, 10/21/2016
VI. Clean Screen Program Maximum Allowable Emissions Limits
9/30/2017
3/11/2019
84 FR 2449, 2/7/2019
VII. On-Board Diagnostic Inspection Passing Criteria
9/30/2017
3/11/2019
84 FR 2449, 2/7/2019
5 CCR 1001-13, Regulation Number 11, Appendices
Appendix A, Technical Specifications
11/30/2014,9/30/2017
3/11/2019
84 FR 2449, 2/7/2019
5 CCR 1001-14, Emission Budgets for Nonattainment Areas in the State of Colorado
Budgets
8/30/1995
4/30/1998
63 FR 15294, 3/31/1998
5 CCR 1001-18, Regulation Number 16, Street Sanding Emissions
I. Street Sanding Materials Specifications
4/19/2001
10/16/2002
67 FR 58335, 9/16/2002
II. Street Sanding Requirements Specific to the Denver PM-10 Attainment/Maintenance Area
4/19/2001
10/16/2002
67 FR 58335, 9/16/2002
5 CCR 1001-20, Nonattainment-Attainment/Maintenance Areas
I. Pagosa Springs Attainment/Maintenance Area
5/30/2000
8/14/2001
66 FR 32556, 6/15/2001
II. Telluride Attainment/Maintenance Area
5/30/2000
8/14/2001
66 FR 32556, 6/15/2001
III. Aspen/Pitkin County PM-10 Attainment/Maintenance Area
2/28/2001
7/14/2003
68 FR 26212, 5/15/2003
IV. Lamar Attainment/Maintenance Area
12/30/2001
11/25/2005
70 FR 61563, 10/25/2005
V. Canon City PM-10 Nonattainment Area
12/30/1993
2/13/1995
59 FR 64332, 12/14/1994
VIII. Steamboat Springs PM10 Attainment/Maintenance Area
11/24/2004
12/30/2001
69 FR 62210, 10/25/2004
5 CCR 1001-21, Regulation Number 21, Control of Volatile Organic Compounds from Consumer Products and Architectural and Industrial Maintenance Coatings
I. Applicability
09/14/2019
6/8/2023
88 FR 29827, 5/9/2023
Limited approval/disapproval 5/9/2023.
II. Consumer Products
09/14/2019
6/8/2023
88 FR 29827, 5/9/2023
Limited approval/disapproval 5/9/2023.
III. Architectural and Industrial Maintenance Coatings
09/14/2019
6/8/2023
88 FR 29827, 5/9/2023
Limited approval/disapproval 5/9/2023.
IV. Definitions
09/14/2019
6/8/2023
88 FR 29827, 5/9/2023
Limited approval/disapproval 5/9/2023.
5 CCR 1001-29 Regulation Number 25, Control of Emissions From Surface Coating, Solvents, Asphalt, Graphic Arts and Printing, and Pharmaceuticals, Part A, Applicability and General Provisions
I. Applicability
6/14/2023
5/11/2026
91 FR 17857, 4/9/2026
State-only provisions excluded. I.A.1.a., I.B.2.a.(iii), I.B.2.d., and I.B.2.d.(iii)-(iv) excluded from approval dated 4/9/2026 insofar as related to northern Weld County.
II. General Provisions
2/14/2025
5/11/2026
91 FR 17857, 4/9/2026
State-only provisions excluded. II.E., II.F., and appendix A excluded.
5 CCR 1001-29 Regulation Number 25, Control of Emissions From Surface Coating, Solvents, Asphalt, Graphic Arts and Printing, and Pharmaceuticals, Part B, Surface Coating, Solvents, Asphalt, Graphic Arts and Printing, and Pharmaceuticals
I. Surface Coating Operations
2/14/2025
5/11/2026
91 FR 17857, 4/9/2026
I.B. through I.O. excluded pending move from Regulation 7.
Appendix D Minimum Cooling Capacities for Refrigerated Freeboard Chillers on Vapor Degreasers
6/14/2023
5/11/2026
91 FR 17857, 4/9/2026
Appendix E Emission Limit Conversion Procedure
6/14/2023
5/11/2026
91 FR 17857, 4/9/2026
5 CCR 1001-30 Regulation Number 26, Control of Emissions from Engines and Major Stationary Sources, Part A, Applicability and General Provisions
I. General Provisions
2/14/2024
5/11/2026
91 FR 17857, 4/9/2026
Appendix A excluded.
5 CCR 1001-30 Regulation Number 26, Control of Emissions from Engines and Major Stationary Sources, Part B, Combustion Equipment and Major Source RACT
I. Control of Emissions from Engines
2/14/2024
5/11/2026
91 FR 17857, 4/9/2026
State-only provisions excluded. I.D.4.c. excluded from approval dated 4/9/2026.
II. Control of Emissions from Stationary and Portable Combustion Equipment in the 8-Hour Ozone Control Area or Northern Weld County
2/14/2025
5/11/2026
91 FR 17857, 4/9/2026
State-only provisions excluded. II.A.1.c.-e., II.A.4. (4th paragraph), II.A.4.a.(v)-(vi), portions of II.A.4.d. and II.A.4.d.(i), II.A.4.d.(ii)-(iii), II.A.4.e.(ii), II.A.4.g.(iii), Row 4 of table 3 in II.A.4.g.(iv), II.A.5.a.(iv)-(v), II.A.5.b.(ii)(B)(5), II.A.5.b.(ii)(C), II.A.6.a.(iii)-(v), II.A.6.b.(viii)(C)-(E), and II.A.8.c. excluded from approval dated 4/9/2026.
III. Control of Emissions from Specific Major Sources of VOC and/or NOX in the 8-Hour Ozone Control Area
6/14/2023
5/11/2026
91 FR 17857, 4/9/2026
III.C. excluded from approval dated 4/9/2026.
IV. Control of Emissions from Breweries in the 8-hour Ozone Control Area
6/14/2023
5/11/2026
91 FR 17857, 4/9/2026
V. Control of Emissions from Foam Manufacturing in the 8-hour Ozone Control Area
2/14/2024
5/11/2026
91 FR 17857, 4/9/2026
V.A.1.b., portion of V.A.4.a., and V.A.8.b. excluded from approval dated 4/9/2026.
IX. Control of Emissions from Cold Rolling Mills
2/14/2025
5/11/2026
91 FR 17857, 4/9/2026
(d) EPA-approved source-specific requirements.
Title
State effective date
EPA effective date
Final rule citation/date
Comments
Long-Term Strategy Review and Revision of Colorado's State Implementation Plan for Class I Visibility Protection: Part I: Hayden Station Requirements
8/15/1996
2/18/1997
62 FR 2305, 1/16/1997
Revision of Colorado's State Implementation Plan for Class I Visibility Protection Craig Station Units 1 and 2 Requirements
4/19/2001
8/6/2001
66 FR 35374, 7/5/2001
(e) EPA-approved nonregulatory provisions.
Title
State effective date
EPA effective date
Final rule citation/date
Comments
Legislation
Concerning Air Pollution Control, and, in connection therewith, revising the Air Program to comply with requirements of the Federal “Clean Air Act Amendments of 1990”
7/1/1993
12/8/1994
59 FR 55584, 11/8/1994
Concerning Legislative Procedures for the Approval of State Implementation Plans and Regulations Related to Air Pollution
5/31/1995
4/30/1998
63 FR 15294, 3/31/1998
Maintenance and Attainment Plan Elements
Aspen
Revised PM10 Maintenance Plan for the Aspen Attainment/Maintenance Area
12/16/2010
11/18/2013
78 FR 57496, 9/19/2013
Canon City
PM10 Maintenance Plan for Canon City
11/20/2008
9/9/2013
78 FR 41307, 7/10/2013
Colorado Springs
Colorado Springs Carbon Monoxide Maintenance Plan
12/17/2009
9/30/2013
78 FR 46521, 8/1/2013
Denver Metropolitan Area
1982 Denver Regional Element of the State Air Quality Implementation Plan
3/4/2001
10/11/2001
66 FR 47086, 9/11/2001
Carbon Monoxide Maintenance Plan for the Denver Metropolitan Area
8/30/2003
11/15/2004
69 FR 55752, 9/16/2004
Ozone Redesignation Request and Maintenance Plan for the Denver Metropolitan Area
1/11/2001
10/11/2001
66 FR 47086, 9/11/2001
PM10 Redesignation Request and Maintenance Plan For the Denver Metropolitan Area
4/19/2001
10/16/2002
67 FR 58335, 9/16/2002
Revision to the Colorado State Implementation Plan: Concerning the removal of the Colorado Clean Vehicle Fleet Program from the SIP, and the adoption of a replacement program
3/1/2000
1/14/2002
66 FR 64751, 12/14/2001
Early Action Compact Ozone Action Plan
5/31/2004
9/19/2005
70 FR 48652, 8/19/2005
2008 Ozone Moderate Area Attainment Plan
1/14/2017
8/2/2018
83 FR 31068, 7/3/2018
Reasonably Available Control Technology for the 2008 8-Hour Ozone National Ambient Air Quality Standard (NAAQS) Moderate State Implementation Plan (RACT SIP)
11/21/2017
1/8/2024
88 FR 85511, 12/8/2023
Previous SIP approvals 7/03/2018, 2/24/2021, and 11/05/2021. Limited approval/limited disapproval of RACT regulations 5/9/2023. Disapproval of refinery fueled process heaters located at major sources of NOX on December 8, 2023.
Ozone (8-hour, 2015) DMNFR NNSR Certification
7/6/2020
6/13/2022
87 FR 29232, 5/13/2022
2008 Ozone Serious Area Attainment Plan
2/14/2020
12/7/2023
88 FR 76676, 11/7/2023
Disapproval of contingency measures. RACM and attainment demonstration withdrawn.
Reasonably Available Control Technology for the 2008 8-Hour Ozone National Ambient Air Quality Standard (NAAQS) Serious State Implementation Plan (RACT SIP)
2/14/2020
1/8/2024
88 FR 85511, 12/8/2023
Disapproval of RACT for certain major sources of NOX on December 8, 2023.
Ozone (8-hour, 2015) DMNFR 2017 Base Year Inventory
2/14/2023
8/21/2024
89 FR 59000, 7/22/2024
Contingency Measures for the 2008 8-Hour Ozone National Ambient Air Quality Standard (NAAQS) Serious State Implementation Plan (Contingency Measures SIP)
2/14/2025
5/11/2026
91 FR 17857, 4/9/2026
Approval of previously disapproved element.
Landfill/biogas fired engine, refinery fuel process heater, and cold rolling mill RACT for the 2008 8-Hour Ozone National Ambient Air Quality Standard (NAAQS) Serious State Implementation Plan
2/14/2025
5/11/2026
91 FR 17857, 4/9/2026
Excluding process heater H-1717 due to identified error in Colorado's submission.
Fort Collins
Revised Carbon Monoxide Maintenance Plan, Fort Collins Attainment/Maintenance Area
12/16/2010
11/12/2013
78 FR 56164, 9/12/2013
Greeley
Greeley Carbon Monoxide Maintenance Plan
12/17/2009
10/1/2013
78 FR 46816, 8/2/2013
Lamar
PM10 Redesignation Request and Maintenance Plan for the Lamar Area
12/30/2001
11/25/2005
70 FR 61563, 10/25/2005
Longmont
Revised Carbon Monoxide Maintenance Plan for the Longmont Attainment/Maintenance Area
3/1/2004
11/29/2004
69 FR 58264, 9/30/2004
Pagosa Springs
Final Revised PM10 Maintenance Plan for the Pagosa Springs Attainment/Maintenance Area
11/19/2009
4/9/2014
79 FR 13256, 3/10/2014
Steamboat Springs
Revised PM10 Maintenance Plan for theSteamboat Springs Attainment/Maintenance Area
1/30/2012
3/23/2015
80 FR 2827, 1/21/2015
Telluride
Revised PM10 Attainment/Maintenance Plan Telluride Attainment/Maintenance Area
11/19/2009
3/13/2014
79 FR 8090, 2/11/2014
Local Ordinances/Resolutions
Adopting the Fort Collins Better Air Campaign for Inclusion in the Fort Collins Element of the State Implementation Plan for Air Quality
9/5/1989
6/17/1991
56 FR 15499, 4/17/1991
Visibility
State Implementation Plan for Class I Visibility Protection, State of Colorado
11/19/1987
10/11/1988
53 FR 30428, 8/12/1988
Regional Haze 5 Year Progress Report
11/19/2015
10/11/2019
84 FR 47884, 9/11/2019
Long-Term Strategy Review and Revision of Colorado's State Implementation Plan for Class I Visibility Protection, Part II: Revision of the Long-Term Strategy
11/18/2004
12/4/2006
71 FR 64465, 11/2/2006
[80 FR 58209, Sept. 28, 2015, as amended at 81 FR 3966, Jan. 25, 2016; 81 FR 21468, Apr. 12, 2016; 81 FR 72722, Oct. 21, 2016; 82 FR 47382, Oct. 12, 2017; 83 FR 14758, Apr. 6, 2018; 83 FR 31071, July 3, 2018; 83 FR 31333, July 5, 2018; 84 FR 2451, Feb. 7, 2019; 84 FR 18992, May 3, 2019; 84 FR 34064, July 17, 2019; 84 FR 47885, Sept. 11, 2019; 85 FR 57697, Sept. 16, 2020; 86 FR 11128, Feb. 24, 2021; 86 FR 61073, Nov. 5, 2021; 87 FR 29231, 29235, May 13, 2022; 87 FR 71261, Nov. 22, 2022; 88 FR 18055, Mar. 27, 2023; 88 FR 18426, Mar. 29, 2023; 88 FR 29833, May 9, 2023; 88 FR 76678, Nov. 7, 2023; 88 FR 85513, Dec. 8, 2023; 89 FR 59002, July 22, 2024; 89 FR 105462, Dec. 27, 2024; 90 FR 51516, Nov. 18, 2025; 91 FR 43, Jan. 2, 2026; 91 FR 17860, Apr. 9, 2026]
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