Water Quality Control Commission Regulations

Most of the regulation files below are pdf documents. These files require the use of the free Adobe Reader.

Procedural and Planning Rules

• Regulation 21 - Procedural Rules (amended 12/12/11, effective 01/31/12)
• Regulation 22 - Site Location and Design Approval Regulations for Domestic Wastewater Treatment Works (amended 8/10/09, effective 9/30/09)
• Regulation 23 - Regulations for State of Colorado Continuing Planning Process (last update effective 8/30/97)
• Colorado Water Quality Management and Drinking Water Protection Handbook - A Continuing Planning Process (Updated 11/13/06, Expiration Date 12/31/11)

Surface Water Quality Classifications and Standards

• Regulation 31 - The Basic Standards and Methodologies for Surface Water (amended 6/13/11, effective 1/1/12)
• Regulation 32 - Classifications and Numeric Standards for Arkansas River Basin (amended 11/14/11, effective 1/1/12)
• Numeric Standards Tables - Regulation 32
• Regulation 33 - Classifications and Numeric Standards for Upper Colorado River Basin and North Platte River (Planning Region 12) (amended 6/13/11, effective 1/1/12)
  • Numeric Standards Tables - Regulation 33
• Regulation 34 - Classifications and Numeric Standards for San Juan River and Dolores River Basins (amended 6/13/11, effective 1/1/12)
  • Numeric Standards Tables - Regulation 34
• Regulation 35 - Classifications and Numeric Standards for Gunnison and Lower Dolores River Basins (amended 6/13/11, effective 1/1/12)
  • Numeric Standards Tables - Regulation 35
• Regulation 36 - Classifications and Numeric Standards for Rio Grande River Basin (amended 6/13/11, effective 1/1/12)
  • Numeric Standards Tables - Regulation 36
• Regulation 37 - Classifications and Numeric Standards for Lower Colorado River Basin (amended 6/13/11, effective 1/1/12)
  • Numeric Standards Tables - Regulation 37
• Regulation 38 - Classifications and Numeric Standards for South Platte River Basin, Laramie River Basin, Republican River Basin, Smoky Hill River Basin (amended 6/13/11, effective 1/1/12)
  • Numeric Standards Tables - Regulation 38
• Regulation 39 - Colorado River Salinity Standards

Ground Water Quality Classifications and Standards

• Regulation 41 - The Basic Standards for Ground Water (amended 10/13/09, effective 11/30/09)
• Regulation 42 - Site-Specific Water Quality Classification and Standards for Ground Water (amended 2/13/06, effective 3/30/06)

Financial Assistance Rules

• Regulation 51 - State of Colorado Water Pollution Control Revolving Fund Rules (amended 3/9/09, effective 3/9/09 (emergency) and 4/30/09 (permanent)
• Regulation 52 - Drinking Water Revolving Fund Rules (amended 3/9/09, effective 3/9/09 (emergency) and 4/30/09 (permanent)
• Regulation 53 - Domestic Wastewater Treatment Grant Funding System (amended 8/11/08, effective 1/1/09)
• Regulation 54 - Drinking Water Grant Fund (amended 8/11/08, effective 1/1/09)
• Regulation 55 - Water Quality Improvement Fund (adopted 5/15/07, effective 7/30/07)

Point Source Discharge Permit and Control Regulations

• Regulation 61 - Colorado Discharge Permit System Regulations (amended 12/12/11, effective 01/30/12)
• Regulation 62 - Regulations for Effluent Limitations (amended 2/11/08, effective 3/30/08)
• Regulation 63 - Pretreatment Regulations (amended 02/12/07, effective 04/01/07)
• Regulation 64 - Biosolids Regulation (amended 2/8/10, effective 3/30/10)
Materials incorporated by reference:
• Code of Federal Regulations - 40 CFR Part 503
• "Test Methods for Evaluating Solid Waste, Physical/Chemical Methods"- SW-846
• Regulation 65 - Regulations Controlling Discharges to Storm Sewers(amended 4/14/08, effective 5/30/08)
• Regulation 66 - Financial Assurance Criteria Regulations for Colorado Housed Commercial Swine Feeding Operations(amended 7/12/10, effective 8/30/10)

Watershed Protection Control Regulations

• Regulation 71 - Dillon Reservoir Control Regulation (amended 4/9/07, effective 5/30/07)
• Regulation 72 - Cherry Creek Reservoir Control Regulation (amended 8/10/09, effective 1/1/10)
• Regulation 73 - Chatfield Reservoir Control Regulation amended 2/9/09, effective 3/30/09)
• Regulation 74 - Bear Creek Watershed Control Regulation (update effective 05/30/05)
• Regulation 75 - Cheraw Lake Control Regulation (triennial review 12/8/03)

Other Control Regulations

• Regulation 81 - Animal Feeding Operations Control Regulation (amended 8/10/09, effective 9/30/09)
• Regulation 82 - 401 Certification Regulation (last update effective 3/31/03)
• Regulation 83 - Passive Treatment of Mine Drainage Control Regulation repealed January 8, 2007)
• Regulation 84 - Reclaimed Water Control Regulation (amended 8/13/07, effective 9/30/07)

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 (amended 3/9/10, effective 4/30/10)
• Notice of Repeal - Regulation 94 (repealed 3/9/10, 4/30/10)
- The Colorado Monitoring and Evaluation List has been incorporated into Regulation 93, Colorado's Section 303(d) List of Impaired Waters and Monitoring and Evaluation List

Drinking Water Regulations

• Primary Drinking Water Regulations - 5 CCR 1003-1 (amended 8/9/10, effective 11/30/10)

ISDS Guidelines

• Guidelines on Individual Sewage Disposal Systems - 5 CCR 1003-6 (section IV.K. amended 9/15/04, effective 11/30/04)
• Individual Sewage Disposal System Permit Surcharge
• Local Permit Surcharge for Statewide ISDS Program Support Factsheet