California's 2012 Section 303(d) List of Impaired Waters

On June 26, 2015, EPA approved California's 2012 Section 303(d) list of impaired waters in three Regional Water Quality Control Boards (the North Coast, the Lahontan and the Colorado River Boards) and disapproved the omission of the mercury impairment at Topaz Lake which met the federal listing requirements. EPA provided public notice of its proposed action to place Topaz Lake on California's 303(d) list and provided opportunity for public comment on the proposed addition. The public comment period closed on July 26, 2015, and no comments were received. On July 30, 2015, EPA issued its final decision to add Topaz Lake to the State's 303(d) list. See EPA's final decision letter below.

California's 2012 Integrated Report is available at the California State Water Resources Control Board.

• Final Decision Letter: California's 2012 Section 303(d) List of Impaired Waters (pdf) (331.41 KB, July 30, 2015)
  EPA's final decision to add Topaz Lake to California's 2014 303(d) list of water quality limited segments still requiring total maximum daily loads pursuant to Clean Water Act, section 303(d), and 40 CFR 130.7(d)(2).
• EPA Partial Approval/Partial Disapproval Letter: California's 2012 303(d) List of lmpaired Waters (pdf) (109.25 KB, June 26, 2015)
  EPA Region 9 partial approval/disapproval letter of California's 2012 Water Quality Integrated Report and supporting documentation pursuant to Clean Water Act (CWA) Sections 303(d) and 305(b).
• EPA Review of California’s 2012 Section 303(d) List (pdf) (98.38 KB, April 24, 2015)
  EPA Review of California’s 2012 Section 303(d) List Submitted April 24, 2015, describing the rationale for EPA's partial approval and partial disapproval of California’s 2012 list of water quality limited segments requiring a Total Maximum Daily Load (TMDL) under Clean Water Act, Section 303(d).