Final Rule | Water Quality Division: Page 4 of 5

Revised on: April 9, 2018 - 9:05am

 

 

 

The Clean Water Act requires that states review, modify as appropriate and adopt surface water quality standards for “waters of the U.S.” at least once every three years, subject to approval by the Environmental Protection Agency (EPA). The following provides related draft and proposed rule information.

Water Quality Standards for Surface Waters (18 Arizona Administrative Code 11, Article 1)

Summary: ADEQ’s last rulemaking for the surface water quality standards was in 2009. ADEQ is seeking to amend errors or clarify language from the 2009 rules changes.

Termination of Prior Rulemaking:
Feb. 19, 2016
Rule: 22 Arizona Administrative Register 343 | Download >

Docket Opening:
Feb. 19, 2016
Rule: 22 Arizona Administrative Register 345 | Download >

Proposed Rulemaking:
Feb. 19, 2016
Rule: 22 Arizona Administrative Register 255 | Download >

Hearings:
Date: April 6, 2016
Time: 10 a.m.
Location: Arizona Department of Environmental Quality
1110 W. Washington Street, Conference Room 3175 A/B
Phoenix, AZ 85007

Close of Comment:
April 6, 2016, 5 p.m.

Studies Supporting the Proposed Rules:

  • ADEQ “Pinto Creek Site-Specific Water Quality Standard for Dissolved Copper, Salt River Watershed — HUC# 15060103-018, Gila, Maricopa and Pinal Counties, Arizona” (January 2015) | Download >
  • AECOM “Grand Canyon National Park — Water Effect Ratio Studies — Round 1; Acute Toxicity of Copper to Ceriodaphnis dubia in Site and Reconstituted Laboratory Water Under Static Test Conditions” (May 2008) | Download >
  • AECOM “Grand Canyon National Park — Water Effect Ratio Studies — Round 2; Acute Toxicity of Copper to Ceriodaphnis dubia in Site and Reconstituted Laboratory Water Under Static Test Conditions” (October 2008) | Download >
  • ADEQ “Location and Application of LCR Nutrient Standards” (February 2014) | Download >
  • ADEQ “A Review of the Status of Paradise Lake as an Arizona Surface Water” (August 2010) | Download >
  • ADEQ “Proposal to Remove Coors Lake from Appendix B” (January 2016) | Download >
  • ADEQ “Review of Proposed Designated Use Changes to Mineral Creek” (January 2016) | Download >

Governor's Regulatory Review Council (GRRC) Meeting:
Aug. 2, 2016

Final Rulemaking:1
Sept. 2, 2016
Rule: 22 Arizona Administrative Register 2328 | Download >

Effective Date:
Aug. 2, 2016 (immediate effective date upon GRRC approval)

1EPA disapproved the following two standards:

  • The “Natural Adaptive” clause at R18-11-115(B)(5), and
  • The site-specific copper criteria in Appendix C for Bright Angel Wash and Transept Canyon.

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