Please note these regulations are housed on the Secretary of State's website linked here.
Drinking water regulations:
- Regulation 11: Colorado Primary Drinking Water Regulations
Procedural and planning rules:
- Regulation 21: Procedural Rules
- Regulation 22: Site Location and Design Regulations for Domestic Wastewater Treatment Works
- Regulation 23: Regulations for State of Colorado Continuing Planning Process
Surface water quality classifications and standards:
- Regulation 31: The Basic Standards and Methodologies for Surface Water
- Regulation 32: Classifications and Numeric Standards for Arkansas River Basin
- Regulation 33: Classifications and Numeric Standards for Upper Colorado River Basin and North Platte River (Planning Region 12)
- Regulation 34: Classifications and Numeric Standards for San Juan River and Dolores River Basins
- Regulation 35: Classifications and Numeric Standards for Gunnison and Lower Dolores River Basins
- Regulation 36: Classifications and Numeric Standards for Rio Grande Basin
- Regulation 37: Classifications and Numeric Standards for Lower Colorado River Basin
- Regulation 38: Classifications and Numeric Standards for South Platte River Basin, Laramie River Basin, Republican River Basin, Smoky Hill River Basin
- Regulation 39: Colorado River Salinity Standards.
Groundwater quality classifications and standards:
- Regulation 41: The Basic Standards for Groundwater
- Regulation 42: Site-Specific Water Quality Classifications and Standards for Groundwater
- Regulation 43: On-Site Wastewater Treatment System Regulation
Financial assistance rules:
- Regulation 51: State of Colorado Water Pollution Control Revolving Fund Rules
- Regulation 52: Drinking Water Revolving Fund Rules
- Regulation 55: State Funded Water and Wastewater Infrastructure Programs
Point Source Discharge Permit and control regulations:
- Regulation 61: Colorado Discharge Permit System Regulations
- Regulation 62: Regulations for Effluent Limitations
- Regulation 63: Pretreatment Regulations
- Regulation 64: Biosolids Regulation
- Regulation 65: Regulations Controlling Discharges to Storm Sewers
- Regulation 66: Financial Assurance Criteria Regulations for Colorado Housed Commercial Swine Feeding Operations
Watershed protection control regulations:
- Regulation 71: Dillon Reservoir Control Regulation
- Regulation 72: Cherry Creek Reservoir Control Regulation
- Regulation 73: Chatfield Reservoir Control Regulation
- Regulation 74: Bear Creek Watershed Control Regulation
Other control regulations:
- Regulation 81: Animal Feeding Operations Control Regulation
- Regulation 82: 401 Certification Regulation
- Regulation 84: Reclaimed Water Control Regulation
- Regulation 85: Nutrients Management Control Regulation
- Regulation 86: Graywater Control Regulation
Implementation of Clean Water Act Section 303(d) requirements:
- Regulation 93: Colorado's Section 303(d) List of Impaired Waters and Monitoring and Evaluation List
Water Quality Civil Penalty Inflation Adjustment Regulation:
- Regulation 101: Water Quality Civil Penalty Inflation Adjustment Regulation.
Water Quality Control Division Cash Fees Regulation:
- Regulation 102: Water Quality Control Division Cash Fees Regulation.
The WQCC regularly holds rulemaking hearings for each regulation. Regulatory changes are adopted with a delayed effective date and can be found in the respective rulemaking hearing records here: