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Central Valley Pyrethroid TMDL and Basin Plan Amendment

Central Valley Pyrethroid Pesticides TMDL and Basin Plan Amendment

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The goal of this project is to Amend the Water Quality Control Plan for the Sacramento and San Joaquin River Basins (Basin Plan) to establish measurable pyrethroid concentration goals and a program of implementation for the control of pyrethroid pesticides that are impacting or could potentially impact aquatic life uses in surface waters in the Sacramento and San Joaquin River watersheds of the Central Valley to establish Total Maximum Daily Loads for waterbodies that are listed for pyrethroids on the Clean Water Act Section 303(d) list, and to establish provisions to address and/or prevent future pyrethroid listings. On 8 June 2017, the Central Valley Water Board adopted Resolution R5-2017-0057, adopting the Amendment ot the Basin Plan for the Control of Pyrethroid Pesticide Discharges and approving the supporting Substitute Enivornmental Documentation and Staff Report. Before becoming fully effective, this Amendment must be approved by the State Water Resources Control Board, the Office of Administrative Law, and United States Environmental Protection Agency. For additional information, please contact Danny McClure at (916) 464-4751 or dmcclure@waterboards.ca.gov.

New! Adopted Basin Plan Amendment and Resolution, Final Staff Report and Response to Comments

8/9 June 2017 Central Valley Board Meeting

On 8 June 2017 the Central Valley Water Board held a hearing to consider adoption of a Proposed Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Pyrethroid Pesticide Discharges.

May 2017 Draft Staff Report and Proposed Amendment

January 2017 Draft Staff Report and Proposed Amendment

Please see above notice for more information on providing comments on the proposed Basin Plan amendment. The Draft Staff Report was posted 25 January 2017 and written comments are due 24 March 2017. A comment hearing on the proposed amendment is scheduled for 23/24 February 2017. Please submit written comments to Tessa Fojut at Tessa.Fojut@waterboards.ca.gov or Danny McClure at Daniel.McClure@waterboards.ca.gov.

Past Board Meetings and Notices

Development of the Draft Staff Report

The following chapter is an excerpt from the draft staff report that provides the rationale for the proposed amendments to Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the control of pyrethroid pesticides discharges. The entire draft staff report was submitted for external scientific peer review on May 29, 2015.

Chapter 5 and Appendix C of the report are being released separately prior to completion of the external scientific peer review to provide preliminary information to the public on the technical analysis supporting development for a portion of the proposed amendment. Chapter 5 describes the alternatives considered and the staff recommendation for water quality objectives for pyrethroid pesticides. Appendix C includes data used for the technical analysis given in Chapter 5. The preceding and subsequent chapters and appendices of the report, which are not the focus of the scientific peer review, are not being released at this time. A complete draft staff report will be released for public comment after the peer review comments have been received and responses to those comments have been prepared (estimated release in winter 2015).

Documents related to the water quality criteria derived using the UC Davis Methodology can be found at: Water Quality Criteria Reports.

Scientific Peer Reviews
The draft staff report that provides the rationale for the proposed amendments to Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the control of pyrethroid pesticides discharges was submitted for external scientific peer review on May 29, 2015.

Public Meetings

Project Scoping

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--Web page updated 07/24/2017