Statutes, codes, and regulations
Colorado Administrative Code
Department 1000 - Department of Public Health and EnvironmentDivision 1002 - Water Quality Control Commission (1002 Series)
Rule 5 CCR 1002-31 - REGULATION NO. 31 - THE BASIC STANDARDS AND METHODOLOGIES FOR SURFACE WATER
Section 5 CCR 1002-31.1 - AUTHORITY AND SCOPE

5 Colo. Code Regs. § 1002-31.1

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Current through Register Vol. 47, No. 20, October 25, 2024
Section 5 CCR 1002-31.1 - AUTHORITY AND SCOPE

This regulation is promulgated pursuant to 25-8-101et seq., and in particular, 25-8-203 and 25-8-204, C.R.S. It provides basic standards, an antidegradation rule and implementation process, and a system: for classifying state surface waters; for assigning water quality standards; for granting temporary modifications and for periodic review of the classifications and standards.

5 CCR 1002-31.1

39 CR 11, June 10, 2016, effective 6/30/2016
39 CR 17, September 10, 2016, effective 12/31/2016
40 CR 03, February 10, 2017, effective 3/2/2017
40 CR 23, December 10, 2017, effective 12/30/2017
41 CR 01, January 10, 2018, effective 1/31/2018
43 CR 03, February 10, 2020, effective 6/30/2020
43 CR 11, June 10, 2020, effective 6/30/2020
44 CR 17, September 10, 2021, effective 12/31/2021
Renumbered from 5 CCR 1002-31.57 44 CR 17, September 10, 2021, effective 12/31/2021
Renumbered to 5 CCR 1002-31.5844 CR 17, September 10, 2021, effective 12/31/2021
46 CR 10, May 25, 2023, effective 6/14/2023