Water Quality Control Commission regulations

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
  • ​List of electronic formats for data exhibits.
• Regulation 22: Site Location and Design Regulations for Domestic Wastewater Treatment Works 
• Regulation 23: Regulations for State of Colorado Continuing Planning Process 
  • A Guide to Colorado Programs for Water Quality Management and Safe Drinking Water:A 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.