Lodi WRRF

State Water Board Passes New Toxicity Provisions

State Water Board, Regulations

From the State Water Board. Updated 2/5/21.

On December 1, 2020, the State Water Resources Control Board (State Water Board) adopted statewide numeric water quality objectives for both acute and chronic toxicity and a program of implementation to control toxicity, which are collectively known as the Toxicity Provisions. The Provisions provide consistent protection of aquatic life beneficial uses in inland surface waters, enclosed bays, and estuaries throughout the state, and protect aquatic habitats and life from the effects of known and unknown toxicants. The Provisions are not yet in effect. The Provisions will take effect upon approval by the California Office of Administrative Law for purposes of state law and upon approval by the U.S. Environmental Protection Agency for purposes of federal law.

Current Announcements

•  On December 1, 2020, the State Water Resources Control Board adopted the Resolution establishing the Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California and adopted the Toxicity Provisions. The Final Resolution, Toxicity Provisions, and Staff Report documents will be posted soon.

Ceriodaphnia dubia Study

• •  December 8, 2020 – Agenda for first Stakeholder Advisory Committee Meeting, scheduled for December 8, 2020 (PDF)
  •  December 7 2020 – Stakeholder Advisory Committee Member Names, Affiliations, and Email Addresses (PDF)
  •  October 30, 2020 – Development of Quality Assurance Recommendations for the Ceriodaphnia dubia Toxicity Test – Excerpt from contract between the State Water Resources Control Board and the Southern California Coastal Water Research Project Authority (Agreement Number 19-078-270) (PDF)

For more information, please visit the “Ceriodaphnia Toxicity Testing Quality Assurance” webpage on the Southern California Coastal Water Research Project Authority (SCCWRP) website: https://www.sccwrp.org/about/research-areas/additional-research-areas/ceriodaphnia-toxicity-testing-quality-assurance/

Alternative Test Procedure (ATP)

November 25, 2020 – ATP Request Letter (PDF)

• Attachment 1. Current Non-Storm Water NPDES Permits (PDF)
• Attachment 2. Current Storm Water NPDES Permits (PDF)
• Attachment 3. ELAP Accredited WET Laboratories (PDF)
• Attachment 4. Summary of Aquatic Toxicity Test Costs (PDF)

2020 Revised Draft Toxicity Provisions Documents

• November 9, 2020 – Summary of Comments and Responses on Appendices J and K and the Differences Between the October 2018 and July 2020 Versions of the Toxicity Provisions and Staff Report (Word Document)

2020 Staff Workshop Presentations

• July 29, 2020 – Staff Public Workshop Presentation (PDF)
• January 9, 2020 – Staff Public Workshop Presentation (PDF)