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San Joaquin River Dissolved Oxygen TMDL

The San Joaquin River Dissolved Oxygen TMDL was adopted by the Regional Board on 27 January 2005. It has been approved by the State Water Resources Control Board (SWRCB) and the Office of Administrative Law. Final approval by U.S. EPA was received on 27 February 2007. The TMDL is a Basin Plan Amendment that includes a Control Program to reduce the amount of oxygen demanding substances and their precursors in the San Joaquin River. For additional information please contact Christine Joab at (916) 464-4655 or by email at cjoab@waterboards.ca.gov.


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New Posting! Downstream Control program Studies and Peer Review Report

The last of the Control Program studies has been completed along with an Independent Peer Review of the models developed for the TMDL. These studies, referred to as the "Downstream Studies", were mainly focused in the reach of the San Joaquin River between Mossdale and Turner Cut. Final report documents for the studies and the Peer Review can be found under the heading below titled, "Implementation of TMDL Required Studies".

Public Meetings and Workshops

Implementation of TMDL

The TMDL contains a Program of Implementation, which describes actions required for those responsible for the contributing factors of the dissolved oxygen impairment, and includes actions to be taken by the Central Valley Regional Water Board to ensure completion of these requirements.

The TMDL Control Program required oxygen demand and precursor studies to be completed to better understand the linkage between sources and downstream impacts.

In 1999, stakeholders formed a Steering Committee and participated in the formation of the TMDL. A Technical Working Group was formed to provide a public forum for discussing and disseminating technical information. A website was developed to store all of the technical information generated during the TMDL development.

2005 Final TMDL Report and Approvals

Development of 2005 Basin Plan Amendment


--Web page updated 10/31/2014