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Historical methyl mercury in San Francisco Bay San Francisco Bay, California is considered a mercury-impaired watershed. Elevated concentrations of mercury are found in water and sediment as well as fish and estuarine birds. Sources of mercury to the watershed since 1845 include sediment-associated mercury from mercury mining, mercury losses from gold amalgamation activities in mines of the Sierra Nevada, aerial deposition of mercury from global and regional emissions to air, and the direct discharge of mercury to Bay waters associated with the urbanization and industrialization of the estuary. We assessed historical trends in mercury bioaccumulation by measuring mercury concentrations in feathers of the endangered California Ridgway’s rail (formerly California... Categories: Data; Tags: California Ridgway's Rail, Feathers, Ice Cores, Lake Tahoe, Mercury, All tags... San Francisco Bay, Sediment, Structural Equation Model, USGS Science Data Catalog (SDC), Wyoming, Fewer tags Assessment of Mercury and Mercury Stable Isotopes in Sediments and Biota from Reservoirs and Remedial Zones within the Saint Louis River, Minnesota This data release includes mercury concentrations and mercury stable isotope measurements measured in sediments and biological tissues collected from the Saint Louis River located in Minnesota. Sediments and biota were collected by the U.S. Geological Survey, U.S. Environmental Protection Agency, U.S. Army Corps of Engineers, and federal contractors (Battelle) from 2017-2021. Collection regions included nearshore zones within the main estuary, remedial sites within the lower river, and upstream reservoir sites. Sediments were analyzed for total mercury, methylmercury, and mercury stable isotopes by the U.S. Geological Survey Mercury Research Laboratory (MRL, Madison, Wisconsin). Biological samples were analyzed... Categories: Data; Tags: Environmental Health, Geochemistry, Saint Louis River, Minnesota, USGS Science Data Catalog (SDC), biota, All tags... food web, isotopic analysis, mercury contamination, Fewer tags Fish tissue mercury and selenium concentrations in Upper Colorado River Basin: 1962-2011 These data were compiled to study mercury and selenium concentrations in fish species and assemblages in lotic waterbodies across the Upper Colorado River Basin. Data were compiled from State and Federal agencies. This data table contains raw concentration data, as well as standardized concentrations corrected for differences based on sample type (i.e., tissue type), species-specific bioaccumulation rates (Table S1), and fish size (Table S2). The data were used in linear mixed effects models to estimate average mercury and selenium concentration in fish species and in fish assemblages, including fish total length (cm), sampling location (Sub basin name and GPS coordinates), and sampling year (Figures 2,3, and 4... Categories: Data; Tags: Arizona, Colorado, Colorado Headwaters, Colorado River, Dirty Devil River, All tags... Dolores River, Great Divide-Upper Green River, Green River, Gunnison, Gunnison River, Lower Green, New Mexico, San Juan, San Juan River, USGS Science Data Catalog (SDC), Upper Colorado River Basin, Upper Colorado-Dirty Devil, Upper Colorado-Dolores, Utah, White River, White-Yampa, Yampa River, bioaccumulation, biota, endangered species, environment, fish, fish samples, fish tissue, fishes, mercury, mercury, mercury contamination, selenium, selenium, selenium concentration, Fewer tags Total mercury concentrations in dragonfly larvae from U.S. national parks (ver. 9.0, November 2023) Comma-separated values (.csv) file containing data related to mercury concentrations in dragonfly samples from U.S. National Parks collected as part of the Dragonfly Mercury Project (DMP). This data release supersedes Eagles-Smith, C.A., Nelson, S.J., Flanagan-Pritz, C.M., Willacker Jr., J.J., and Klemmer, A.J., 2018, Total mercury concentrations in dragonfly larvae from U.S. national parks (ver. 8.0, December 2022): U.S. Geological Survey data release, https://doi.org/10.5066/P9TK6NPT. Please contact fresc_outreach@usgs.gov for access. Categories: Data, Data Release - Revised; Tags: Acadia National Park, Allegheny Portage Railroad National Historic Site, Amistad National Recreation Area, Apostle Islands National Lakeshore, Appomattox Court House National Historical Park, All tags... Aquatic Biology, Assateague Island National Seashore, Battle Creek Cypress Swamp, Bear Creek Lake Park, Bear Meadows Natural Area, Big Bend National Park, Big Cypress National Preserve, Big Thicket National Preserve, Buffalo National River, Cape Cod National Seashore, Capitol Reef National Park, Carl Sandburg Home National Historic Site, Carlsbad Caverns National Park, Channel Islands National Park, Chattahoochee River National Recreation Area, Chickasaw National Recreation Area, City of Rocks National Reserve, Colorado National Monument, Congaree National Park, Crater Lake National Park, Craters of the Moon National Monument & Preserve, Cuyahoga Valley National Park, Death Valley National Park, Delaware Water Gap National Recreation Area, Denali National Park and Preserve, Devils Tower National Monument, East Inlet Natural Area-Connecticut Lakes Nature Preserve, Ecology, Ell Pond Preserve, Everglades National Park, Fort Larned National Historic Site, Fort Worth Nature Center and Refuge National Natural Landmark, Gateway National Recreation Area, Glacier Bay National Park & Preserve, Glacier National Park, Glen Canyon National Recreation Area, Golden Gate National Recreation Area, Grand Canyon National Park, Grand Portage National Monument, Grand Teton National Park, Great Basin National Park, Great Sand Dunes National Park, Great Smoky Mountains National Park, Gulf Islands National Seashore, Hawaii Volcanoes National Park, Homestead National Monument, Horseshoe Bend National Military Park, Hot Springs National Park, Indiana Dunes National Park, Isle Royale National Park, Jean Lafitte National Historical Park and Preserve, John Day Fossil Beds National Monument, Joshua Tree National Park, Katahdin Woods and Waters National Monument, Katmai National Park and Preserve, Kenai Fjords National Park, Kenilworth Park & Aquatic Gardens, Klondike Gold Rush National Historical Park, Knife River Indian Villages National Historic Site, Lake Clark National Park and Preserve, Lassen Volcanic National Park, Lewis and Clark National Historical Park, Lilley Cornett Woods, Mammoth Cave National Park, Marsh-Billings-Rockefeller National Park, Maurice National Wild and Scenic River, Minute Man National Historical Park, Mississippi National River & Recreation Area, Monocacy National Battlefield, Montezuma Castle National Monument, Mount Rainier National Park, Natchez Trace Parkway and National Scenic Trail, New River Gorge National Park and Preserve, Niobrara National Scenic River, North Cascades National Park, Ocmulgee Mounds National Historical Park, Olympic National Park, Oregon Caves National Monument, Ozark National Scenic Riverway, Padre Island National Seashore, Petersburg National Battlefield, Pictured Rocks National Lakeshore, Pinnacles National Park, Pipestone National Monument, Prince William Forest Park, Pu'ukohola Heiau National Historic Site, Redwood National Park, Richmond National Battlefield Park, Rio Grande Wild & Scenic River, Rock Creek Park, Rocky Mountain National Park, Roosevelt-Vanderbilt National Historic Sites, Saguaro National Park, Saint Croix National Scenic Riverway, Saint-Gaudens National Historic Site, San Juan Island National Historical Park, Santa Monica Mountains National Recreation Area, Sequoia & Kings Canyon National Parks, Shenandoah National Park, Sleeping Bear Dunes National Lakeshore, Sudbury, Assabet & Concord Wild & Scenic Rivers, Tallgrass Prairie National Preserve, Timucuan Ecological Historic Preserve, Tumacacori National Historical Park, Tuzigoot National Monument, USGS Science Data Catalog (SDC), Upper Delaware Scenic and Recreational River, Valles Caldera National Preserve, Voyageurs National Park, Water Quality, Weir Farm National Historical Park, Wekiva Wild & Scenic River, White Mountain National Forest, Wildlife Biology, Wind Cave National Park, Women’s Rights National Historical Park, Yellowstone National Park, Yosemite National Park, Zion National Park, biota, environment, mercury contamination, Fewer tags Mercury concentrations in amphibian tissues across the United States, 2016-2021 Comma-separated values (.csv) file containing data related to amphibian sampling across the United States between 2016 and 2021. Data files contain mercury concentrations in amphibian and dragonfly tissues, mercury concentrations in sediment, as well as amphibian morphometrics, and habitat and climate characteristics where the samples were collected. Categories: Data; Tags: Aquatic Biology, California, Colorado, Connecticut, Ecology, All tags... Environmental Health, Louisiana, Maine, Manitoba, Massachusetts, Montana, Oregon, Pennsylvania, USGS Science Data Catalog (SDC), Vermont, Virginia, Water Quality, Wildlife Biology, Wisconsin, Wyoming, biota, environment, inlandWaters, mercury contamination, Fewer tags Anticoagulant rodenticide concentrations in blood and tissue of California condors and turkey vultures (ver. 2.0, May 2023) The dataset includes specifics on liver tissue and blood plasma anticoagulant rodenticide concentrations measured using high-performance liquid chromatography-tandem mass spectrometry. This data release supersedes Herring, G., and Eagles-Smith, C.A., 2022, Anticoagulant rodenticide concentrations in blood and tissue of California condors and turkey vultures: U.S. Geological Survey data release, https://doi.org/10.5066/P9NHPLHX. Please contact fresc_outreach@usgs.gov for access. Categories: Data, Data Release - Revised; Tags: Arizona, California, California condor, Ecology, Oregon, All tags... USGS Science Data Catalog (SDC), Wildlife Biology, anticoagulant rodenticide, avian scavengers, biota, common raven, ecotoxicology, environment, food web, liver tissue, ornithology, plasma, turkey vulture, wildlife biology, Fewer tags Hydrological, Chemical, and Biological Characterization of the Snake River and Associated Tributaries and Irrigation Drains from River Mile 448 to 346, 2022 This dataset includes field hydrologic measurements and laboratory analyses of surface and pore waters, sediments, benthic plants/biofilms, and biota along the Middle Snake River upgradient of the Hells Canyon Complex. The study region for this work focuses on a section of the Snake River heavily utilized for agriculture, with complex systems of irrigation diversion and return drainage, spanning 164 km above the Hells Canyon Complex (Idaho, Oregon). The goal of this study was to identify potential loading sources of methylmercury from the upgradient Snake River into the reservoir complex, with a focus on the tributaries, irrigation return drains, and riparian zones adjacent to agricultural lands along the river.... Categories: Data; Tags: Aquatic Biology, Environmental Health, Geochemistry, Hydrology, Idaho, All tags... Oregon, Snake River, USGS Science Data Catalog (SDC), Water Quality, aquatic ecosystems, bioaccumulation, biofilm, biota, dissolved metals, ecotoxicology, environment, geochemistry, hydrology, inlandWaters, invertebrates, mercury, methylmercury, pore water quality, sediment quality, surface water quality, water chemistry, Fewer tags Mercury Bioaccumulation in US National Parks Using Dragonfly Larvae as Biosentinels, 2009-2018 Comma-separated values (.csv) files containing data related to a National-scale assessment of mercury bioaccumulation in the US National Parks using dragonfly larvae as biosentinels through a citizen science framework. Categories: Data; Tags: Acadia National Park, Allegheny Portage Railroad National Historic Site, Apostle Islands National Lakeshore, Appomattox Court House National Historical Park, Aquatic Biology, All tags... Battle Creek Cypress Swamp, Bear Creek Lake Park, Bear Meadows Natural Area, Big Bend National Park, Big Cypress National Park, Big Thicket National Preserve, Buffalo National River, Cape Cod National Seashore, Capitol Reef National Park, Carl Sandburg Home National Historic Site, Channel Islands National Park, Chickasaw National Recreation Area, Colorado National Monument, Congaree National Park, Cuyahoga Valley National Park, Death Valley National Park, Delaware Water Gap National Recreation Area, Denali National Park and Preserve, Devils Tower National Monument, East Inlet Natural Area-Connecticut Lakes Nature Preserve, Ecology, Environmental Health, Everglades National Park, Fort Worth Nature Center and Refuge National Natural Landmark, Gateway National Recreation Area, Glacier Bay National Park & Preserve, Glacier National Park, Glen Canyon National Recreation Area, Golden Gate National Recreation Area, Grand Canyon National Park, Grand Portage National Monument, Grand Teton National Park, Great Basin National Park, Great Sand Dunes National Park, Great Smoky Mountains National Park, Gulf Islands National Seashore, Hawaii Volcanoes National Park, Homestead National Historic Site, Hot Springs National Park, Indiana Dunes National Park, Isle Royale National Park, Jean Lafitte National Historical Park and Preserve, John Day Fossil Beds National Monument, Katahdin Woods and Waters National Monument, Katmai National Park and Preserve, Kenilworth Park & Aquatic Gardens, Klondike Gold Rush National Historical Park, Knife River Indian Villages National Historic Site, Lake Clark National Park, Lassen Volcanic National Park, Lewis and Clark National Historical Park, Mammoth Cave National Park, Marsh-Billings-Rockefeller National Park, Maurice National Wild & Scenic River, Minute Man National Historical Park, Mississippi National River & Recreation Area, Monocacy National Battlefield, Montezuma Castle National Monument, Mount Rainier National Park, Natchez Trace Parkway and National Scenic Trail, Niobrara National Scenic River, North Cascades National Park, Olympic National Park, Oregon Caves National Monument, Ozark National Scenic Riverway, Padre Island National Seashore, Pictured Rocks National Lakeshore, Pinnacles National Park, Pipestone National Monument, Prince William Forest Park, Pu'ukohola Heiau National Historic Site, Redwood National Park, Richmond National Battlefield Park, Rock Creek Park, Rocky Mountain National Park, Roosevelt-Vanderbilt National Historic Sites, Saguaro National Park, Saint Croix National Scenic Riverway, Saint-Gaudens National Historic Site, San Juan Island National Historical Park, Santa Monica Mountains National Recreation Area, Saugus Iron Works National Historic Site, Sequoia & Kings Canyon National Parks, Shenandoah National Park, Sleeping Bear Dunes National Lakeshore, Tallgrass Prairie National Preserve, Timucuan Ecological Historic Preserve, Tumacacori National Historical Park, Tuzigoot National Monument, USGS Science Data Catalog (SDC), Upper Delaware Scenic and Recreational River, Valles Caldera National Preserve, Voyageurs National Park, Water Quality, Weir Farm National Historic Site, Wildlife Biology, Wind Cave National Park, Women’s Rights National Historical Park, Yellowstone National Park, Yosemite National Park, Zion National Park, biota, environment, mercury contamination, Fewer tags Mercury in fishes from Clear Lake, California, 2019 and 2020 (ver. 2.0, February 2022) Comma-separated values (.csv) file containing data related to mercury in fishes collected from Clear Lake, California. This data release supersedes Pierce, J.R., Feyrer, F.V., Young, M.J., Enos, E.R., Clause, J.K., Alpers, C.N., and Eagles-Smith, C.A., 2022, Mercury in fishes from Clear Lake, California, 2019 and 2020: U.S. Geological Survey data release, https://doi.org/10.5066/P96912PN. Please contact fresc_outreach@usgs.gov for access. Categories: Data; Tags: Aquatic Biology, Clear Lake, CA, Ecology, Environmental Health, USGS Science Data Catalog (SDC), All tags... Water Quality, Wildlife Biology, biota, chemical analysis, contamination and pollution, environment, inlandWaters, Fewer tags Wetland Management Strategy to Reduce Mercury Export in Water and Bioaccumulation in Fish Total mercury concentrations in western mosquitofish (Gambusia affinis) that were caged at specific locations within four control wetlands and four treatment wetlands for a 30-day exposure time period to test the effectiveness of wetland management strategy to reduce mercury contamination. Fish data only. Water data published in a separate data release by co-authors. These data support the following publication: Ackerman, J.T., Fleck, J.A., Eagles‐Smith, C.A., Marvin‐DiPasquale, M., Windham‐Myers, L., Herzog, M.P. and McQuillen, H.L., 2019. Wetland Management Strategy to Reduce Mercury in Water and Bioaccumulation in Fish. Environmental toxicology and chemistry. https://doi.org/10.1002/etc.4535 Categories: Data; Tags: Cosumnes River Preserve, USGS Science Data Catalog (SDC), bioaccumulation, fish, mercury, All tags... methlmercury, Fewer tags Modeled Pacific salmon escapement biomass and nutrient and contaminant concentrations across western North America, 1976-2015 The data contain yearly modeled estimates of Pacific salmon escapement (in annual metric tons of wet mass) from 1976 to 2015 across four regions of western North America. A second data file contains modeled estimates of contaminant or nutrient concentrations in Pacific Salmon. The modeled estimates were derived from Bayesian generalized linear models (contaminant or nutrient concentrations) or from Bayesian generalized additive models (Salmon Escapement). Categories: Data; Tags: Aquatic Biology, Bering Sea Wilderness, British Columbia, North America, Southeast Alaska, All tags... USGS Science Data Catalog (SDC), biota, contamination and pollution, escapement, nutrient cycling, salmon, subsidies, Fewer tags Fluctuating Asymmetry in Waterbirds in Relation to Mercury Exposure The dataset includes the bird species, sex, mercury concentration in breast feathers and whole blood, and the composite measure of fluctuating asymmetry. Statistical models were developed for each species to analyze the relationship between mercury exposure in either breast feathers or whole blood and the composite measure of fluctuating asymmetry, while accounting for the sex of each bird. Categories: Data; Tags: California, Ecology, Environmental Health, Exposure, Fluctuating asymmetry, All tags... Mercury, Mercury toxicity, San Francisco Bay, USGS Science Data Catalog (SDC), Wildlife Biology, Fewer tags Mercury in smallmouth bass from the Snake River, USA, 2013-2022 Comma-separated values (.csv) file containing data related to mercury in smallmouth bass (Micropterus dolomieu) collected from the Snake River, USA. Categories: Data; Tags: Aquatic Biology, Ecology, Environmental Health, Idaho, Oregon, All tags... Snake River, USA, USGS Science Data Catalog (SDC), Water Quality, Wildlife Biology, biota, chemical analysis, contamination and pollution, environment, inlandWaters, Fewer tags Mercury and biogeochemical parameters in surface water and sediment from U.S. National Parks, 2014-2015 (ver. 2.0, December 2023) Comma-separated values (.csv) file containing data related to mercury and biogeochemical parameters in surface water and aquatic sediment collected from U.S. National Parks in 2014-2015. Categories: Data, Data Release - Revised; Tags: Acadia National Park, Big Bend National Park, Big Cypress National Park, Big Thicket National Preserve, Cape Cod National Seashore, All tags... Chickasaw National Recreation Area, Cuyahoga Valley National Park, Denali National Park and Preserve, Glacier National Park, Great Smoky Mountains National Park, Gulf Islands National Seashore, Indiana Dunes National Park, John Day Fossil Beds National Monument, Knife River Indian Villages National Historic Site, Lake Clark National Park and Preserve, Mammoth Cave National Park, Marsh-Billings-Rockefeller National Park, Montezuma Castle National Monument, Mount Rainier National Park, Niobrara National Scenic River, Olympic National Park, Ozark National Scenic Riverway, Pictured Rocks National Lakeshore, Pipestone National Monument, Redwood National Park, Rocky Mountain National Park, Roosevelt-Vanderbilt National Historic Sites, Saguaro National Park, Saint-Gaudens National Historic Site, Shenandoah National Park, Tallgrass Prairie National Preserve, Timucuan Ecological & Historic Preserve, Tumacacori National Historical Park, Tuzigoot National Monument, USGS Science Data Catalog (SDC), USGS:637e5e47d34ed907bf769345, Valles Caldera National Preserve, Voyageurs National Park, Yellowstone National Park, Yosemite National Park, environment, inlandWaters, mercury contamination, Fewer tags Assessment of Mercury Cycling in the St Louis River, MN using Mercury and Food Web (Carbon and Nitrogen) Stable Isotopes The St Louis River (SLR) is the second largest tributary to Lake Superior and a designated area of concern (AOC) due to past industrial contamination of organic chemicals and heavy metals, including mercury (Hg). Sediments, prey items (odonates, mixed benthic invertebrates, and spiders), and game fish were targeted within this study to determine if industrial sources of Hg were bioaccumulating into the food web. Samples from SLR were directly compared to a reference site in the Bad River, WI to assess if legacy contamination resulted in elevated Hg concentrations in comparisons to background regions with no known point sources. Carbon and nitrogen isotopes were also employed as food web tracers to determine if dietary... Categories: Data; Tags: Bad River, WI, Environmental Health, Geochemistry, Lake Superior, St Louis River, MN, All tags... USGS Science Data Catalog (SDC), bioaccumulation, contamination, food web, mercury, Fewer tags Biomass and methylmercury concentrations in biweekly biological samples from Brownlee and Oxbow Reservoir outflows, Snake River Hells Canyon Complex (Idaho-Oregon), 2018-2019 This dataset describes biomass and methylmercury concentrations in zooplankton, other invertebrates, fish, and coarse and fine detritus samples collected at the outflow locations of Brownlee and Oxbow Reservoirs in the Snake River Hells Canyon Complex. Based on the sampling locations, the sampled materials were presumed to have flowed through the dam turbines or over the spillway, thereby representing biological export from the reservoirs. Samples were collected biweekly at each location over a sixteen-month period, June 2018 – September 2019. Sampling and analysis methods are described in the Processing Steps section of the metadata. Categories: Data; Tags: Aquatic Biology, Ecology, Environmental Health, Hells Canyon, Ictaluridae, All tags... Idaho, Lepomis macrochirus, Micropterus dolomieu, Oregon, Perca flavescens, Pomoxis, Snake River, USGS Science Data Catalog (SDC), Water Quality, Water Resources, bioaccumulation, biota, contamination and pollution, ecotoxicology, environment, field sampling, fish, inlandWaters, invertebrates, mercury contamination, methylmercury, plankton, toxic trace element contamination, Fewer tags Contaminants in larval, juvenile, and adult Pacific lamprey (Entosphenus tridentatus), Oregon, 2017-2021 This data release contains analytical results of organohalogenated compounds and mercury in lamprey and sediment that were collected from rivers in Oregon and along the Pacific northwest coast from 2017 to 2021. In 2017, 20 lamprey were collected off the Washington and Oregon coasts by the National Oceanic and Atmospheric Administration. These ocean-caught juvenile lamprey were parasitizing targeted fish and were bycatch. In 2019, larval lamprey were collected by the Confederated Tribes of Warm Springs of Oregon from 8 sites on the Warm Springs Reservation. Larval lamprey were collected by electroshocking depositional sediment areas. Collocated depositional sediment samples also were collected along with the larval... Categories: Data; Tags: Aquatic Biology, Environmental Health, Oregon, USGS Science Data Catalog (SDC), United States, All tags... Warm Springs Indian Reservation, Water Quality, aquatic biology, biota, contamination and pollution, ecotoxicology, inlandWaters, Fewer tags Total Mercury and Methylmercury in Riparian Songbirds and Aquatic Invertebrates from the Willamette Valley, Oregon, 2013-2014 This dataset includes bird species, invertebrate order and family, sample identification codes, capture date, latitude, longitude, habitat, site name, bird age, total mercury concentrations in bird blood, and methylmercury concentrations in whole body aquatic invertebrates. Categories: Data; Tags: Aquatic Biology, Black Butte Mine, Cottage Grove Lake, Ecology, Environmental Health, All tags... Oregon, USGS Science Data Catalog (SDC), Water Quality, Wildlife Biology, Willamette River, aquatic invertebrates, biota, bivalves, chemical analysis, contamination and pollution, crustaceans, environment, inlandWaters, invertebrates, methylmercury, songbirds, specimen collecting, total mercury, Fewer tags Mercury Concentrations and Stable Isotopes in Riparian Songbirds and Invertebrates from the Willamette River, Oregon, 2013 This dataset includes bird species, invertebrate order and family, sample identification codes, collection date, latitude, longitude, site name, bird age, invertebrate life stage, invertebrate trophic group, carbon and nitrogen stable isotopes in birds and invertebrates, total mercury concentrations in bird blood, and methylmercury concentrations in composite invertebrates. Categories: Data; Tags: Aquatic Biology, Ecology, Environmental Health, Oregon, USGS Science Data Catalog (SDC), All tags... Water Resources, Wildlife Biology, Willamette River, biota, environment, mercury contamination, Fewer tags Mercury stable isotopes in biota, sediment, groundwater, and waste piles, Clear Lake area, Lake County, California, 2019-2022 Samples were collected from Clear Lake, California from 2019-2022 by the U.S. Geological Survey (USGS) California Water Science Center, the USGS Forest and Rangeland Ecosystem Science Center (FRESC), the US Environmental Protection Agency, and EA Engineering Science and Technology Inc. to assess the extent and cycling of legacy mercury (Hg) contamination from Sulphur Bank Mine. Samples of waste rock, sediments, groundwater, and biological tissue (zooplankton, bluegill, smallmouth bass, Mississippi silversides, and largemouth bass) were analyzed for Hg stable isotopes by the U.S. Geological Survey Mercury Research Laboratory. Mercury concentrations for sediments, waste rocks, and groundwaters are included within... Categories: Data; Tags: California, Clear Lake, California, Environmental Health, Lake County, California, USGS Science Data Catalog (SDC), All tags... fish, groundwater, isotopic analysis, mercury contamination, mine waste, sediment, Fewer tags 1 2 »