Copper TMDLs

The State Water Resources Control Board (State Water Board) will hold a public meeting to consider adopting a resolution to approve the Santa Ana Regional Water Quality Control Board's (Santa Ana Water Board) amendment to the Santa Ana River Basin Water Quality Control Plan (Basin Plan) to incorporate Total Maximum Daily Loads (TMDLs) for Copper in Newport Bay (Basin Plan amendment). The public hearing will be held at the following date, time, and location:

Tuesday, August 5, 2025, 9:00 AM
COASTAL HEARING ROOM
Joe Serna Jr. - CalEPA Headquarters Building
1001 I Street, Second Floor
Sacramento, CA 95814
and via Video and Teleconference

The State Water Board's Notice of Public Meeting on the Newport Bay Copper TMDLs is now available in English, Spanish/Español, and Traditional [Mandarin] Chinese/繁體中文"到繁體. The Santa Ana Water Board adopted the Basin Plan amendment on December 2, 2022, by Resolution R8-2022-0012. The public comment period for the State Water Board approval process ended on July 17, 2023.

• Resolution R8-2022-0012
• Final Responses to Cu TMDL Comments

For updates on the Copper TMDLs, Subscribe to the E-mail Notification List (Select " Newport Bay Cu / Metals -TMDL").

Basin Plan Amendments for Copper (Cu) TMDLs for Regional Board Hearing - December 2, 2022

• Basin Plan Amendment (BPA) Cu TMDLs - Attachment A to Resolution 2022-0012
• Substitute Environmental Document (SED) - Cu TMDLs
• Staff Report - Cu TMDLs - SED Appendix A
• SED Appendix B-1a Responses to 2016 Comments Document (2018)
• SED Appendix B-1b Responses to 2016 Board Meeting Comments Document (2021)
• SED Appendix B-2 Responses to August 2018 Comments Document (2021)
• SED Appendix B-3 Responses to 2019 Workshops Comments Document (2021)
• SED Appendix B-4 Responses to August 2021 Comments - Cu TMDLs (2022)
• SED Appendix B-5 Responses to County-City Alternative Implementation Proposal
• Notice of Public Hearing & Filing (October 18, 2022)

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