Water Quality Control Commission Regulations

Procedural and Planning Rules

• Regulation 21 - Procedural Rules (amended 12/12/11, effective 1/31/12)
• 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 9/11/12, effective 1/31/13)

• Regulation 32 - Classifications and Numeric Standards for Arkansas River Basin (amended 11/14/11, effective 1/1/12)
  • Numeric Standards Tables - Regulation 32
• Regulation 32 - DELAYED EFFECTIVE DATE  - Classifications and Numeric Standards for Arkansas River Basin (Temporary Modificastions amended 01/14/13, effective 6/30/13) 
  • Numeric Standards Tables - DELAYED EFFECTIVE DATE  - Regulation 32 (Temporary Modifications amended 1/14/13, effective 6/30/13)
• 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 33 - DELAYED EFFECTIVE DATE  -  Classifications and Numeric Standards for Upper Colorado River Basin and North Platte River (Planning Region 12) (Temporary Modifications amended 1/14/13, effective 6/30/13) 
  • Numeric Standards Tables - DELAYED EFFECTIVE DATE   - Regulation 33 (Temporary Modifications amended 1/14/13, effective 6/30/13) 
• Regulation 34   - Classifications and Numeric Standards for San Juan River and Dolores River Basins (amended 11/5/12, effective 3/30/13)
  • Numeric Standards Tables   - Regulation 34 
• Regulation 35  - Classifications and Numeric Standards for Gunnison and Lower Dolores River Basins (amended 11/5/12, effective 3/30/13)
  • Numeric Standards Tables   - Regulation 35  (amended 11/5/12, effective 3/30/13)
• Regulation 35 - DELAYED EFFECTIVE DATE  -  Classifications and Numeric Standards for Gunnison and Lower Dolores River Basins (Temporary Modifications amended 1/14/13, effective 6/30/13)
  • Numeric Standards Tables - DELAYED EFFECTIVE DATE   - Regulation 35 (Temporary Modifications amended 1/14/13, effective 6/30/13)
• 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 36 - DELAYED EFFECTIVE DATE  -  Classifications and Numeric Standards for Rio Grande River Basin (Temporary Modifications amended 1/14/13, effective 6/30/13) 
  • Numeric Standards Tables - DELAYED EFFECTIVE DATE   - Regulation 36 (Temporary Modifications amended 1/14/13, effective 6/30/13)
• 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 37 - DELAYED EFFECTIVE DATE   - Classifications and Numeric Standards for Lower Colorado River Basin  (Temporary Modifications amended 1/14/13, effective 6/30/13)
  • Numeric Standards Tables - DELAYED EFFECTIVE DATE  - Regulation 37 (Temporary Modifications amended 1/14/13, effective 6/30/13)
•   Regulation 38  - Classifications and Numeric Standards for South Platte River Basin, Laramie River Basin, Republican River Basin, Smoky Hill River Basin (amended 10/9/12, effective 3/1/13)  
  • Numeric Standards Tables   - Regulation 38    
• Regulation 38 - DELAYED EFFECTIVE DATE   - Classifications and Numeric Standards for South Platte River Basin, Laramie River Basin, Republican River Basin, Smoky Hill River Basin  (Temporary Modifications amended 1/14/13, effective 6/30/13)
  • Numeric Standards Tables - DELAYED EFFECTIVE DATE   - Regulation 38 (Temporary Modifications amended 1/14/13, effective 6/30/13)
• Regulation 39 - Colorado River Salinity Standards

Ground Water Quality Classifications and Standards

• Regulation 41 - The Basic Standards for Ground Water (amended 9/11/12, effective 1/31/2013) 
• 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 5/14/12, effective 6/30/12)
• 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 (amended 6/11/12, effective 7/30/12)

Point Source Discharge Permit and Control Regulations

• Regulation 61 - Colorado Discharge Permit System Regulations (amended 12/12/11, effective 1/30/12)
• Regulation 62 - Regulations for Effluent Limitations (amended 6/11/12, effective 7/30/12)
• 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 10/9/12, effective 11/30/12)
• 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 84 - Reclaimed Water Control Regulation (amended 8/13/07, effective 9/30/07)
• Regulation 85 - Nutrients Management Control Regulation (adopted 6/11/12, effective 9/30/12)

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 02/13/12, effective 03/30/12)

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

Your opinion is important to us. If you have comments regarding this information, or wish to have additional information included, please e-mail us at cdphe.wqcc@state.co.us