Water Quality Control Commission regulations

 
Drinking water regulations:
  • Regulation 11: Colorado Primary Drinking Water Regulations (5 CCR 1002-11) (amended 11/13/18, effective 12/31/18).
Procedural and planning rules:
 
Surface water quality classifications and standards (currently effective):
  • Regulation 31: The Basic Standards and Methodologies for Surface Water (amended 12/11/17, effective 1/31/18).
  • Regulation 32: Classifications and Numeric Standards for Arkansas River Basin (amended 8/6/2018, effective 12/31/2018).
    • Appendix 32-1, Stream Classifications and Water Quality Standards Tables.
  • Regulation 33: Classifications and Numeric Standards for Upper Colorado River Basin and North Platte River (Planning Region 12) (amended 3/12/18, effective 6/30/18).
    • Appendix 33-1, Stream Classifications and Water Quality Standards Tables.
  • Regulation 34: Classifications and Numeric Standards for San Juan River and Dolores River Basins (amended 8/7/17, effective 12/31/17).
    • Appendix 34-1, Stream Classifications and Water Quality Standards Tables.
  • Regulation 35: Classifications and Numeric Standards for Gunnison and Lower Dolores River Basins (amended 8/7/17, effective 12/31/17).
    • Appendix 35-1, Stream Classifications and Water Quality Standards Tables.
  • Regulation 36: Classifications and Numeric Standards for Rio Grande Basin (amended 8/6/2018, effective 12/31/2018).
    • Appendix 36-1, Stream Classifications and Water Quality Standards Tables.
  • Regulation 37: Classifications and Numeric Standards for Lower Colorado River Basin (amended 1/8/18, effective 6/30/18).
    • Appendix 37-1, Stream Classifications and Water Quality Standards Tables.
  • Regulation 38: Classifications and Numeric Standards for South Platte River Basin, Laramie River Basin, Republican River Basin, Smoky Hill River Basin (amended 1/8/18, effective 6/30/18).
    • Appendix 38-1, Stream Classifications and Water Quality Standards Tables.
  • Regulation 39: Colorado River Salinity Standards.  
Surface water quality classifications and standards (adopted with delayed effective date)
 
Temporary Modifications (adopted 1/14/2019, effective 6/30/2019):
  • 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. 
  • 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. 

The links above are for revisions to regulations that have been adopted by the WQCC but have not yet been published by the Secretary of State because of a delayed effective date. Follow the links above to the Secretary of State's edocket website where the clean version and redline version are available for download for each regulation.  

Groundwater quality classifications and standards:
  • Regulation 41: The Basic Standards for Ground Water (amended 11/14/16, effective 12/30/16).
  • Regulation 42: Site-Specific Water Quality Classifications and Standards for Ground Water (amended 5/7/18, effective 6/30/18).
  • Regulation 43: On-Site Wastewater Treatment System Regulation (adopted 5/15/18, effective 5/15/18).
 
Financial assistance rules:
  • Regulation 51: State of Colorado Water Pollution Control Revolving Fund Rules (amended 8/10/15, effective 9/30/15).
  • Regulation 52: Drinking Water Revolving Fund Rules (amended 8/10/15, effective 9/30/15). 
  • Regulation 55: State Funded Water and Wastewater Infrastructure Programs (amended 11/13/17, effective 12/31/17).
 
Point Source Discharge Permit and control regulations:
  • Regulation 61: Colorado Discharge Permit System Regulations (amended 11/13/2018, effective 12/31/18).
  • Regulation 62: Regulations for Effluent Limitations (amended 6/11/12, effective 7/30/12).
  • Regulation 63: Pretreatment Regulations (amended 12/12/16, effective 03/01/17).
  • Regulation 64: Biosolids Regulation (amended 5/12/14, effective 6/30/14).
  • 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).
 
Other control regulations:
  • Regulation 81: Animal Feeding Operations Control Regulation (amended 6/12/2017, effective 7/31/17).
  • Regulation 82: 401 Certification Regulation (last update effective 1/30/19). 
  • Regulation 84: Reclaimed Water Control Regulation (amended 10/9/18, effective 11/30/18).
  • Regulation 85: Nutrients Management Control Regulation (adopted 11/13/17, effective 12/30/17).
  • Regulation 86: Graywater Control Regulation (amended 11/9/15, effective 12/30/15).
 
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 01/08/18, effective 03/02/18).