mercury

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  • Bioaccumulation of Pollutants in California Waters: A Review of Historic Data and Assessment of Impacts on Fishing and Aquatic Life

    Bioaccumulation of Pollutants in California Waters: A Review of Historic Data and Assessment of Impacts on Fishing and Aquatic Life

    California State Water Resources Control Board, San Francisco Estuary Institute | October 24, 2007...
    Summary

    This report was written for the State Water Resources Control Board’s Surface Water Ambient Monitoring Program (SWAMP) as a step toward the development...

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  • California Bay – Delta Authority Fish Mercury Project: The Relationship between Landscape Features and Sport Fish Mercury in the Sacramento-San Joaquin Delta Watershed

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    California Bay – Delta Authority Fish Mercury Project: The Relationship between Landscape Features and Sport Fish Mercury in the Sacramento-San Joaquin Delta Watershed

    San Francisco Estuary Institute | November 2, 2007...
    Summary

    The goal of this study was to quantify the relationship between landscape features and mercury in sport fish. We hypothesized that spatial variation...

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  • Contaminant Concentrations in Sport Fish from San Francisco Bay: 2014

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    Contaminant Concentrations in Sport Fish from San Francisco Bay: 2014

    San Francisco Estuary Institute | January 1, 2014...
    Summary

    This summary report presents results from a 2014 survey of contaminants in San Francisco Bay sport fish, as well as an additional 2015...

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  • Contaminant Effects on California Bay-Delta Species & Human Health

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    Contaminant Effects on California Bay-Delta Species & Human Health

    San Francisco Estuary and Watershed Science | December 1, 2016...
    Summary

    Many contaminants in the California Bay-Delta exceed regulatory standards, impact aquatic species, and potentially affect human health. Recent studies provide evidence that contaminants...

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  • DRERIP Ecosystem Conceptual Model: Chemical stressors

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    DRERIP Ecosystem Conceptual Model: Chemical stressors

    California Department of Fish and Wildlife | February 5, 2008...
    Summary

    The Sacramento-San Joaquin Delta ecosystem comprises many different habitat types, and is home to a large number of species. Thousands of chemical contaminants...

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  • DRERIP Ecosystem Conceptual Model: Mercury

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    DRERIP Ecosystem Conceptual Model: Mercury

    California Department of Fish and Wildlife | January 24, 2008...
    Summary

    Mercury has been identified as an important contaminant in the Delta, based on elevated concentrations of methylmercury (a toxic, organic form that readily...

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  • Environmental Health Risks from Abandoned Mines in the Sierra Nevada

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    Environmental Health Risks from Abandoned Mines in the Sierra Nevada

    The Sierra Fund | June 9, 2014...
    Summary

    The widespread pollution from Gold Rush mining activities, including mercury, arsenic and lead, constitutes the oldest and longest neglected environmental justice problem in...

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  • Estimating Exposure of Piscivorous Birds and Sport Fish to Mercury in California Lakes Using Prey Fish Monitoring—A Predictive Tool for Managers

    Estimating Exposure of Piscivorous Birds and Sport Fish to Mercury in California Lakes Using Prey Fish Monitoring—A Predictive Tool for Managers

    U.S. Geological Survey (USGS) | May 22, 2015...
    Summary

    Numerous water bodies in California are listed under the Clean Water Act as being impaired due to mercury (Hg) contamination. The Surface Water...

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  • Long-term Monitoring of Pollutants in Fish and Mussels Documents Major Improvements and Persistent Problems

    Long-term Monitoring of Pollutants in Fish and Mussels Documents Major Improvements and Persistent Problems

    California State Water Resources Control Board | December 1, 2007...
    Summary

    Of the 390 sites sampled between 1998 and 2003, 32 percent fell into the “low” contamination category. These sites were scattered throughout the...

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  • Mercury levels in nearshore fish from the Central Coast area: Important information for fish consumers

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    Mercury levels in nearshore fish from the Central Coast area: Important information for fish consumers

    State Water Resources Control Board | April 11, 2017...
    Summary

    Several species of marine fish commonly caught in nearshore Central Coast waters may contain high levels of mercury. Several rockfish species, especially Black-and-Yellow,...

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  • Mercury losses and recovery during a suction dredge test in the South Fork of the American River

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    Mercury losses and recovery during a suction dredge test in the South Fork of the American River

    State Water Resources Control Board | July 29, 2005...
    Summary

    Mercury has been used widely since the dawn of recorded history for gold mining. During California’s gold rush, gold miners used about 6...

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  • Mercury on a landscape scale—Balancing regional export with wildlife health

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    Mercury on a landscape scale—Balancing regional export with wildlife health

    U.S. Geological Survey (USGS), U.S. Environmental Protection Agency (EPA), U.S. Bureau of Land Management (BLM), California Department of Fish and Wildlife (CDWF), California Water Boards - Central Valley Regional Water Quality Control Board, Cosumnes River Preserve | June 26, 2018...
    Summary

    The Cosumnes River watershed requires a 57–64 percent reduction in loads to meet the new Delta methylmercury (MeHg) total maximum daily load allocation,...

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  • Mercury Risks to Wildlife in California Lakes: Statewide Survey Finds Fish-Eating Birds at Risk in Many Lakes

    Mercury Risks to Wildlife in California Lakes: Statewide Survey Finds Fish-Eating Birds at Risk in Many Lakes

    U.S. Geological Survey | May 22, 2015...
    Summary

    Numerous water bodies in California are listed under the Clean Water Act as being impaired by mercury contamination. Mercury generally poses risks both...

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  • Mercury, Monomethyl Mercury, and Dissolved Organic Carbon Concentrations in Surface Water Entering and Exiting Constructed Wetlands Treated with Metal-Based Coagulants, Twitchell Island, California

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    Mercury, Monomethyl Mercury, and Dissolved Organic Carbon Concentrations in Surface Water Entering and Exiting Constructed Wetlands Treated with Metal-Based Coagulants, Twitchell Island, California

    USGS | August 30, 2015...
    Summary

    Coagulation with metal-based salts is a practice commonly employed by drinking-water utilities to decrease particle and dissolved organic carbon concentrations in water. In...

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  • Mining’s Toxic Legacy: An Initiative to Address Mining Toxins in the Sierra Nevada

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    Mining’s Toxic Legacy: An Initiative to Address Mining Toxins in the Sierra Nevada

    The Sierra Fund | March 1, 2008...
    Summary

    The purpose of this report is to present current information on the nature and extent of mining toxins in the Sierra, the problems...

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  • Pulse of the Delta 2012

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    Pulse of the Delta 2012

    Delta Regional Monitoring Program | August 2, 2013...
    Summary

    This second edition of the Pulse of the Delta includes the following sections: The KEY TOPIC article introduces this year’s theme, LINKING SCIENCE...

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  • Quantifying the Eroded Volume of Mercury-Contaminated Sediment Using Terrestrial Laser Scanning at Stocking Flat, Deer Creek, Nevada County, California, 2010–13

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    Quantifying the Eroded Volume of Mercury-Contaminated Sediment Using Terrestrial Laser Scanning at Stocking Flat, Deer Creek, Nevada County, California, 2010–13

    USGS | July 7, 2016...
    Summary

    High-resolution ground-based light detection and ranging (lidar), also known as terrestrial laser scanning, was used to quantify the volume of mercury-contaminated sediment eroded...

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  • Reducing Methylmercury Accumulation in the Food Webs of San Francisco Bay and Its Local Watersheds

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    Reducing Methylmercury Accumulation in the Food Webs of San Francisco Bay and Its Local Watersheds

    San Francisco Estuary Institute | April 8, 2014...
    Summary

    San Francisco Bay (California, USA) and its local watersheds present an interesting case study in estuarine mercury (Hg) contamination. This review focuses on...

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  • Sources, Pathways and Loadings: Multi-Year Synthesis with a Focus on PCBs and Hg

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    Sources, Pathways and Loadings: Multi-Year Synthesis with a Focus on PCBs and Hg

    San Francisco Estuary Institute | December 15, 2015...
    Summary

    This report provides a synthesis of information gathered since 2000 on sources, pathways, and loadings of pollutants of concern in the San Francisco...

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  • Summary of the MeHg Panels of the 2004 CalFed Science Conference

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    Summary of the MeHg Panels of the 2004 CalFed Science Conference

    San Francisco Estuary Institute | November 22, 2004...
    Summary

    Mercury (Hg) can become an environmental problem when sulfate-reducing anaerobic bacteria, in the presence of organic substrates, form methylmercury (MeHg), a highly toxic...

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