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 - Currently Effective

• 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 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 5/13/13, effective 5/13/13)
  • 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 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 5/13/13, effective 5/13/13)  
  • Numeric Standards Tables   - Regulation 38      
• Regulation 39 - Colorado River Salinity Standards

• Regulation 32  EFFECTIVE JUNE 30, 2013  - Classifications and Numeric Standards for Arkansas River Basin (Temporary Modifications amended 01/14/13, effective 6/30/13)   
  • Numeric Standards Tables   EFFECTIVE JUNE 30, 2013 - Regulation 32   
• Regulation 33  EFFECTIVE JUNE 30, 2013 -  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   EFFECTIVE JUNE 30, 2013 - Regulation 33  
• Regulation 35   EFFECTIVE JUNE 30, 2012  -  Classifications and Numeric Standards for Gunnison and Lower Dolores River Basins (Temporary Modifications amended 1/14/13, effective 6/30/13)   
  • Numeric Standards Tables   EFFECTIVE JUNE 30, 2013 - Regulation 35
• Regulation 36   EFFECTIVE JUNE 30, 2013 -  Classifications and Numeric Standards for Rio Grande River Basin (Temporary Modifications amended 1/14/13, effective 6/30/13)   
  • Numeric Standards Tables   EFFECTIVE JUNE 30, 2013 - Regulation 36
• Regulation 37   EFFECTIVE JUNE 30, 2013   - Classifications and Numeric Standards for Lower Colorado River Basin  (Temporary Modifications amended 1/14/13, effective 6/30/13)
  • Numeric Standards Tables   EFFECTIVE JUNE 30, 2013 - Regulation 37 
• Regulation 38 EFFECTIVE JUNE 30, 2013 - 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  EFFECTIVE JUNE 30, 2013 - Regulation 38   

• Regulation 32  EFFECTIVE SEPTEMBER 30, 2013 - Classifications and Numeric Standards for Arkansas River Basin (amended 5/13/13, effective 9/30/13) 
  • Numeric Standards Tables   EFFECTIVE SEPTEMBER 30, 2013 - Regulation 32 
• Regulation 33   EFFECTIVE SEPTEMBER 30, 2013 - Classifications and Numeric Standards for Upper Colorado River Basin and North Platte River (Planning Region 12) (amended 5/13/13, effective 9/30/13) 
  • Numeric Standards Tables   EFFECTIVE SEPTEMBER 30, 2013 - Regulation 33 
• Regulation 34   EFFECTIVE SEPTEMBER 30, 2013 Classifications and Numeric Standards for San Juan River and Dolores River Basins (amended 5/13/13, effective 9/30/13) 
  • Numeric Standards Tables  EFFECTIVE SEPTEMBER 30, 2013 - Regulation 34
• Regulation 35  EFFECTIVE SEPTEMBER 30, 2013 - Classifications and Numeric Standards for Gunnison and Lower Dolores River Basins (amended 5/13/13, effective 9/30/13)   
  • Numeric Standards Tables  EFFECTIVE SEPTEMBER 30, 2013 - Regulation 35
• Regulation 36  EFFECTIVE SEPTEMBER 30, 2013 - Classifications and Numeric Standards for Rio Grande River Basin (amended 5/13/13, effective 9/30/13)   
  • Numeric Standards Tables   EFFECTIVE SEPTEMBER 30, 2013 - Regulation 36
• Regulation 37   EFFECTIVE SEPTEMBER 30, 2013 - Classifications and Numeric Standards for Lower Colorado River Basin (amended 5/13/13, effective 9/30/13)   
  • Numeric Standards Tables  EFFECTIVE SEPTEMBER 30, 2013 - Regulation 37 
• Regulation 38  EFFECTIVE SEPTEMBER 30, 2013 - Classifications and Numeric Standards for South Platte River Basin, Laramie River Basin, Republican River Basin, Smoky Hill River Basin (amended 5/13/13, effective 9/30/13)    
  • Numeric Standards Tables  EFFECTIVE SEPTEMBER 30, 2013 - Regulation 38

 Ground Water Quality Classifications and Standards

• Regulation 41 - The Basic Standards for Ground Water (amended 9/11/12, effective 1/31/13) 
• Regulation 42 - Site-Specific Water Quality Classification and Standards for Ground Water (amended 2/13/06, effective 3/30/06)
• Regulation 43  -  EFFECTIVE JUNE 30, 2013 - On-Site Wastewater Treatment System Regulation (adopted 5/13/13, effective 6/30/13)

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  CURRENTLY EFFECTIVE - Water Quality Improvement Fund (amended 6/11/12, effective 7/30/12)
• Regulation 55  EFFECTIVE JUNE 30, 2013 - Water Quality Improvement Fund (amended 5/13/12, effective 6/30/13) 

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

• Notice of Repeal of Guidelines on Individual Sewage Disposal Systems  EFFECTIVE JUNE 30, 2013  

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