Welcome to the California Regional Water Quality Control Board, Central Valley Region Welcome to the California Environmental Protection Agency
Governor
My Water Quality
Performance Report
Central Valley Regional Water Board Brochure
Central Valley Regional Water Board Groundwater Quality Protection Strategy
RESOURCES

American River Watershed Methylmercury TMDL and Basin Plan Amendment

 

  • American River Watershed Mercury TMDL CEQA Scoping Meeting - CANCELED
    The meeting that was to be held on July 28 is being canceled.  The American River Methylmercury TMDL will be incorporated into the Statewide Mercury TMDL currently being developed by the State Water Resources Control Board.

Central Valley Water Board Data Compilations

The following are fish, water, and sediment mercury data that will be used for the development of the TMDL:

Past Stakeholder Meetings

13 April 2011 Stakeholder Meeting

17 March 2011 Stakeholder Meeting

17 February 2011 Stakeholder Meeting
Agenda topics included numeric targets and water quality objectives, fisheries management, and TMDL strategies.

11 January 2011 Stakeholder Meeting
Agenda topics included TMDL and BPA background, data availability, and source analysis strategies.

16 & 17 November 2010 Stakeholder Meeting
Board staff held meetings to introduce the American River Watershed Methylmercury TMDL to stakeholders on November 16, 2010 in Placerville and November 17, 2010 in Auburn. 

27 September 2010 Bay-Delta Science Conference
Board staff presented a poster providing information about the LAR Methylmercury TMDL at the Bay-Delta Science Conference.  Below is a copy of the poster presentation.

16 September 2010 Stakeholder Meeting
 Agenda topics included a presentation of Guiding Principles and the Straw Proposal

12 August 2010 Stakeholder Meeting
Agenda topics included a presentation of the inorganic mercury and methylmercury sources in the watersheds and potential fish tissue targets.

  • LAR TMDL 12 August 2010 Stakeholder Meeting Summary, 38 KB, PDF (PDF Info)
  • Agenda for 12 August 2010 Stakeholder Meeting, 22 KB, PDF (PDF Info)
  • Meeting Presentation, 610 KB, PDF (PDF Info)
  • Technical Reports discussed during the meeting:
    • Peterson, S.A., J. Van Sickle, A.T. Herlihy, and R.M. Hughes. 2007. Mercury concentration in fish from streams and rivers throughout the western United States. Environmental Science & Technology, 41(1): 58-65.
    • Slotton, D. 2008. The UC Davis Biosentinel Mercury Program: Using Small Fish to Monitor Fine-scale Patterns of Methylmercury Contamination in the Watershed Fact Sheet. The Fish Mercury Project. Contribution NO. 552. May, Available at: http://legacy.sfei.org/cmr/fishmercury/552_UCDFactSheet_FinalWebApril18_HiRes2.pdf, 3.21 MB*, PDF (PDF Info)
    • SFEI. 2007. The Fish Mercury Project: Monitoring and Reducing Methylmercury Exposure in the Bay-Delta Watershed. SFEI Contribution 531. San Francisco Estuary Institute, Oakland, CA, Available at: http://legacy.sfei.org/cmr/reports/FMP_531_FinalReport_lowRes.pdf, 21.81 MB*, PDF (PDF Info)
    • Foe, C., S. Louie, and D. Bosworth. 2008. Methylmercury Concentrations and Loads in the Central Valley and Freshwater Delta. Final Report submitted to the CALFED Bay-Delta Program for the project “Transport, Cycling and Fate of Mercury and Monomethylmercury in the San Francisco Delta and Tributaries” Task 2. Central Valley Regional Water Quality Control Board., Available at: http://mercury.mlml.calstate.edu/reports/reports/
    • Louie, S., C. Foe, and D. Bosworth. 2008. Mercury and Suspended Sediment Concentrations and Loads in the Central Valley and Freshwater Delta. Final Report submitted to the CALFED Bay-Delta Program for the project “Transport, Cycling and Fate of Mercury and Monomethylmercury in the San Francisco Delta and Tributaries” Task 2. Central Valley Regional Water Quality Control Board., Available at: http://mercury.mlml.calstate.edu/reports/reports/
    • Stephenson, M., C. Foe, G. Gill, K. Coale. 2008. Transport, Cycling and Fate of Mercury and Monomethylmercury in the San Francisco Delta and Tributaries.  Final Report submitted to the CALFED Bay-Delta Program.  September, 2008.
    • Choe, K., G. A. Gill, R. D. Lehman, S. Han. 2004. Sediment-water exchange of total mercury and monomethyl mercury in the San Francisco Bay-Delta. Limnology Oceanography, 49: 1512-1527.

CEQA Scoping Meeting

8 July 2010 CEQA Scoping Meeting
A CEQA Scoping Meeting/Public Workshop was held at on 8 July 2010 at the Central Valley Water Board in Rancho Cordova.

*Downloading Large Files
Please allow sufficient time for the file to download completely. Depending on your internet connection service, browser version and computer speed, downloading may take 15 minutes or more for files that are larger than 1 MB. Some browsers, such as certain versions of Internet Explorer, do not show the progress of the download, making it appear that nothing is happening.

--Web page updated 07/18/2011