Colorado Becomes Seventh State with Class VI Primacy
1 Minute Read
October 15, 2026
Categories: Carbon
On October 13, the US Environmental Protection Agency (EPA) published the final rule authorizing Colorado’s Energy and Carbon Management Commission (ECMC) to regulate all underground injection of carbon dioxide for long-term geological sequestration within the state. The final rule followed a comprehensive technical and legal review to ensure the state’s Underground Injection Control (UIC) program met all requirements under the Safe Drinking Water Act (SDWA) section 1422.
Colorado ECMC previously received primacy over Class II wells in 1984 and will now regulate permitting, compliance, and enforcement for Class II and Class VI wells. EPA will retain jurisdiction over other well classes and for Class II and Class VI wells on tribal lands. Prior to the grant of primacy, EPA had only one Class VI permit application pending review for a project in Colorado. This application will now be transferred to ECMC.
Colorado marks the seventh state to obtain Class VI primacy.
PartnerAlexandra focuses on environmental issues across media involving regulation, compliance, enforcement and litigation.
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PartnerAs a former US Environmental Protection Agency (EPA) attorney, Sam utilizes his agency, regulatory, enforcement, and practical experience to help his clients navigate environmental, energy, natural resource, sustainability ...
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- Risk Management
- Risk Management Plan
- Risk Management Program
- Risk Management Regulations
- Rivers and Harbors Act
- RMP
- Roadmap Release
- Roanoke River Basin Association
- Robert Powelson
- ROE
- ROEs
- RoHS
- Roundtable on Sustainable Palm Oil
- Roundup
- Royalties
- RPS
- RRBA
- RRC
- RTR
- Rule 14a-8(i)(7)
- Rule 65(c)
- Rulemaking
- Russia
- SAB
- Sackett
- Sacred Sites
- SAFE
- Safe Drinking Water Act
- Safe Harbor
- Safe Harbor Regulation
- Safe Harbor Warning
- Safer Consumer Products
- SAFETY Act
- Safety Management System
- San Francisco Bay Regional Water Quality Control Board
- SASB
- SaskPower’s Boundary Dam Unit 3
- SB 1371
- SCAQMD
- Science
- Science Advisory Board
- Science Advisory Board (SAB)
- Scope
- Scope 1
- Scope 2
- Scope 3
- Scott Pruitt
- SCOTUS
- SDWA
- SEC
- Section 10
- Section 104 Request
- Section 114 Request
- Section 179B(b)
- Section 208 Request
- Section 308 Request
- Section 4
- Section 401
- Section 404
- Section 408
- Section 45Q
- Section 5
- Section 6(b)
- Securities Act
- Securities and Exchange Commission
- Securities and Exchange Commission (SEC)
- Securities Law
- Seismicity
- Seminole Rock
- Senate
- Senate Energy and Natural Resources Committee
- Senator Lamar Alexander
- SEP
- SEPs
- Services
- Settlements
- Sewage
- Shareholder Lawsuits
- Shutdown
- Sierra Club
- Significant Figures
- Significant Guidance
- Significant New Use Rule
- SIP
- Smelter
- SNUR
- Social
- Social Media
- Solar
- Solid Waste
- South China Sea
- South Coast Air Quality Management District
- SPCC
- Species
- SPEED Act
- Spill Prevention Control and Countermeasure Rule
- SSB 5135
- SSM SIP Call
- Stabilization Clause
- Standing
- Standing Rock Sioux
- Stare Decisis
- State
- State Administrative Appeals
- State Air Pollution Control Board
- State Constitutions
- State Environmental Quality Review Act
- State Implementation Plan
- State Law
- State Water Resources Control Board
- States
- Statute
- Statute of Limitations
- Statutory Authority
- Statutory Interpretation
- Stormwater
- Strategic
- Straw Proposal
- Subrogation
- sulfur dioxide
- Sunset Review
- Superfund
- Supplemental Environmental Projects
- Supply Chain
- Supreme Court
- Supreme Court of Texas
- Supreme Court of the United States (SCOTUS)
- Surface Mining Act
- Surface Mining and Reclamation Act
- Surface Water Discharge
- Susan Bodine
- Sustainability
- Sustainability Accounting Standards Board
- Sustainable Development Goals
- Sustainable Investing
- SWDA
- Switzerland
- SWRCB
- Tailings Storage Facility
- Take
- Take Prohibition
- Takings
- Task Force on Climate-Related Financial Disclosures (TCFD)
- Tax
- Tax Credit
- Tax Credits
- Tax Cuts and Jobs Act
- Tax Reform
- Taxonomy Regulation
- TCEQ
- TCI
- Temporary Policy
- TERP
- Texas
- Texas Alliance of Energy Producers
- Texas Commission on Environmental Quality
- Texas Legislature
- Texas Railroad Commission
- Texas Water Development Board
- Thailand
- THC
- The European Commission
- The Mikado
- The Treasury Department
- The Water Infrastructure Improvements Act
- the WIIN Act
- Third Circuit
- Threatened Species
- Title V
- TMDL
- TMDLs
- TNALs
- Toledo
- Tolling Order
- Total Maximum Daily Load
- Toxic Chemicals
- Toxic Substances Control Act
- Toxic Substances Control Act (TSCA)
- Toxics
- Toxics Release Inventory
- Transcos
- Transition
- Transmission
- Transparency
- Transport
- Treasury
- Treaty Rights
- Trends
- TRI
- Tribal Rights
- Tribes
- Trump
- Trump Administration
- TSA
- TSCA
- TSF
- TWDB
- U.S. Army Corps of Engineers
- U.S. Environmental Protection Agency
- U.S. Senate
- Ultimate Net Loss
- UNCLOS
- Underground Injection Wells
- Underground Storage Tank
- UNFCCC
- Unified Agenda
- United Airlines
- United Nations
- United Nations Framework Convention on Climate Change
- Urgenda
- US Army Corps of Engineers
- US Chemical Safety Board
- US Climate Alliance
- US Court of Appeals for the Ninth Circuit
- US Customs and Border Protection
- US Department of Agriculture
- US Environmental Protection Agency
- US Environmental Protection Agency (EPA)
- US Fish and Wildlife Service
- US FWS
- US SAFETY Act
- US Securities and Exchange Commission
- US Securities and Exchange Commission (SEC)
- US Supreme Court
- USACE
- USDA
- USDOT
- USFWS
- USMCA
- Utilities
- Utility
- Vapor Intrusion
- Vapor Recovery Units
- VCP
- Venting
- Veto
- Village of Old Mill Creek. v. Star
- Vineyard Wind
- Virginia
- Virginia Clean Economy Act
- Virginia Community Flood Preparedness Fund
- Virginia Department of Environmental Quality
- Virginia State Corporation Commission
- Vision of Corporation Finance
- VOCs
- Volatile Organic Compounds
- Voluntary Cleanup Program
- Voluntary Remediation
- Waiver
- Waiver Period
- Warnings
- Washington
- Waste
- Waste Discharge Identification Number
- Waste Electrical and Electric Equipment
- Waste Permitting
- Wasted Food
- Wastewater
- Wastewater Treatment
- Water
- Water Quality Certification
- Water Quality Criteria
- Water Regulation
- Water Reuse
- Water Supply and Management
- Water Systems
- Waterfront
- Waters
- Waters of the United States
- WDID
- WEA
- WEEE
- Well Blowout
- Well Control Rule
- WET Tests
- Wetlands
- Whole Effluent Testing
- Wholesale Electricity
- WildEarth Guardians
- Wildfire
- Wind
- Wind Energy
- Wind Energy Area
- Wind Farms
- Winning on Reducing Food Waste Initiative
- Winter v. NRDC
- Withdrawal or Reinstatement
- World Bank Group Equator Principles
- Worst-Case Discharge
- WOTUS
- WQBELs
- WQC
- Wyoming
- Zero Emissions
- Zero-Emissions Vehicle Initiative
- Zinke
Authors
- Walter J. Andrews
- Fatima Anjum
- John J. Beardsworth, Jr.
- Timothy E. Biller
- John R. Bobka
- George Borovas
- Lawrence J. Bracken II
- Shannon S. Broome
- Karma B. Brown
- Samuel L. Brown
- F. William Brownell
- Joseph W. Buoni
- Courtney Cochran Butler
- Aaron J. Carroll
- E. Carter Chandler Clements
- Benjamin Y. Cooper IV
- Eric S. Crusius
- Christopher J. Cunio
- Alexandra B. Cunningham
- Field Daniel
- Andrea DeField
- Douglas L. Dua
- Deidre G. Duncan
- Chloe Dupre
- Frederick R. Eames
- Kevin S. Elliker
- Clare Ellis
- Latosha M. Ellis
- Joanna D. Enns
- Geoffrey B. Fehling
- Hannah Flint
- Steven C. Friend
- Kevin E. Gaunt
- Andrew G. Geyer
- Roger C. Gibboni
- Sevren R. Gourley
- Elisabeth R. Gunther
- Steven M. Haas
- Alexandra Hamilton
- James W. Head
- Elizabeth L. Horner
- Patrick Jamieson
- Kevin W. Jones
- Laura Ellen Jones
- Dan J. Jordanger
- Ryan T. Ketchum
- Jonathan H. Kim
- Scott H. Kimpel
- Abigail Klauer
- Charles H. Knauss
- Katherine Kulbok
- J. Pierce Lamberson
- Lucinda Minton Langworthy
- Charlotte E. Leszinske
- Brian R. Levey
- Michael S. Levine
- Elbert Lin
- Eric R. Link
- David S. Lowman, Jr.
- Erika Maley
- Sadie Mapstone
- James Martin
- Jeffrey N. Martin
- Lorelie S. Masters
- Patrick M. McDermott
- Kerry L. McGrath
- Robert J. McNamara
- Nathan R. Menard
- Michael J. Messonnier, Jr.
- Todd S. Mikolop
- Lily Monfort
- Angela Morrison
- Michael J. Mueller
- Eric J. Murdock
- Ted J. Murphy
- Carlos A. Nevarez
- William L. Newton
- Paul T. Nyffeler, PhD
- Peter K. O’Brien
- G. Michael O’Leary
- Evangeline C. Paschal
- Kate Perkins
- Shemin V. Proctor
- Myles F. Reynolds
- Doris Rodríguez
- Brent A. Rosser
- Rachel Saltzman
- Arthur E. Schmalz
- Penny A. Shamblin
- Michael R. Shebelskie
- George P. Sibley, III
- Joseph C. Stanko
- Brian T. Stansbury
- Martin P. Stratte
- Javaneh S. Tarter
- Thomas W. Taylor
- David Arthur Terry
- Linda Trees
- Andrew J. Turner
- Paige Van Oosten
- Emily Burkhardt Vicente
- Carl von Merz
- Ayesha K. Waheed
- Gregory R. Wall
- Daniel C. Warren
- Thomas R. Waskom
- Malcolm C. Weiss
- Susan F. Wiltsie
