State Water Quality

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  • A hybrid machine learning model to predict and visualize nitrate concentration throughout the Central Valley aquifer, California, USA

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    A hybrid machine learning model to predict and visualize nitrate concentration throughout the Central Valley aquifer, California, USA

    Science of the Total Environment | June 9, 2017...
    Summary

    Intense demand forwater in the Central Valley of California and related increases in groundwater nitrate concentration threaten the sustainability of the groundwater resource....

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  • Adapting to Change: Utility Systems and Declining Flows

    Adapting to Change: Utility Systems and Declining Flows

    California Water Urban Agencies | November 1, 2017...
    Summary

    During the recent historic drought, Californians responded to the call for emergency statewide water use reductions, which the state has recognized as a...

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  • Advancement of Salinity and Flow Monitoring in the San Francisco Bay Delta, San Francisco Bay Delta Action Plan Implementation Support, FINAL REPORT

    Advancement of Salinity and Flow Monitoring in the San Francisco Bay Delta, San Francisco Bay Delta Action Plan Implementation Support, FINAL REPORT

    U.S. Geological Survey, U.S. Environmental Protection Agency | February 1, 2017...
    Summary

    This report evaluates the cost and utility of adding coupled surface and near-bottom salinity monitors along the axis of the San Francisco Estuary,...

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  • An Evaluation of Compensatory Mitigation Projects Permitted Under Clean Water Act Section 401 by the California State Water Resources Control Board, 1991-2002

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    An Evaluation of Compensatory Mitigation Projects Permitted Under Clean Water Act Section 401 by the California State Water Resources Control Board, 1991-2002

    California State Water Resources Control Board | August 2, 2008...
    Summary

    The purpose of this project, which was funded by the California State Water Resources Control Board (SWRCB), was to evaluate the compliance and...

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  • An Index of Biotic Integrity (IBI) for Perennial Streams in California’s Central Valley

    An Index of Biotic Integrity (IBI) for Perennial Streams in California’s Central Valley

    California State Water Resources Control Board | December 1, 2008...
    Summary

    Bioassessment is the science of using aquatic organisms as indicators of ecological condition in streams in rivers. Many types of organisms can be...

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  • Bay Delta Water Quality Control Plan (Bay Delta Plan)

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    Bay Delta Water Quality Control Plan (Bay Delta Plan)

    California State Water Resources Control Board | December 13, 2006...
    Summary

    "Bay Delta Plan" is short for the State Water Resources Control Board's (State Water Board) San Francisco Bay/Sacramento-San Joaquin Delta Estuary Water Quality...

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  • Benthic Invertebrate and Deposited Sediment TMDL Guidance for the Pajaro River Watershed

    Benthic Invertebrate and Deposited Sediment TMDL Guidance for the Pajaro River Watershed

    California State Water Resources Control Board | March 1, 2016...
    Summary

    The Pajaro River and its tributaries are exposed to sediments from a variety of sources. To establish limits for regulating this pollutant, it...

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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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  • Biological Condition of Non-Perennial Streams and Spring-Fed Oases in the Colorado River Basin Region

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    Biological Condition of Non-Perennial Streams and Spring-Fed Oases in the Colorado River Basin Region

    State Water Resources Control Board | August 22, 2014...
    Summary

    The Colorado River Basin Regional Water Board conducted bioassessment sampling at high-quality (i.e., “reference”) streams in their region during 2013-2015. The purpose of...

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  • Biology-based Stressor Thresholds

    Biology-based Stressor Thresholds

    California State Water Resources Control Board, Non-point Source Program | October 1, 2011...
    Summary

    The objective of this memo is to describe how biological assessment data (such as those collected using Surface Water Ambient Monitoring Program (SWAMP)...

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  • California’s Groundwater Update 2013: A Compilation of Enhanced Content for California Water Plan Update 2013

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    California’s Groundwater Update 2013: A Compilation of Enhanced Content for California Water Plan Update 2013

    California Department of Water Resources (DWR) | April 1, 2015...
    Summary

    The primary goal of California’s Groundwater Update 2013: A Compilation of Enhanced Content for California Water Plan Update 2013 (California’s Groundwater Update 2013)...

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  • Characterizing Nitrates in Central Coast Groundwater

    Characterizing Nitrates in Central Coast Groundwater

    Central Coast Groundwater Coalition (CCGC) | April 1, 2016...
    Summary

    The Central Coast Groundwater Coalition (CCGC) is a third-party cooperative groundwater monitoring program that was established for landowners/operators in the Central Coast region...

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  • Clean Water, Clean Beaches Water Quality Funding Measure*

    Clean Water, Clean Beaches Water Quality Funding Measure*

    Los Angeles County Department of Public Works, Los Angeles County Flood Control District | September 21, 2012...
    Summary

    The Problem: Stormwater and runoff rushes down the street, picking up trash and toxic pollutants. On a rainy day, over 10 billion gallons...

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  • Detections of current-use pesticides at 12 surface water sites in California during a 2-year period beginning in 2015

    Detections of current-use pesticides at 12 surface water sites in California during a 2-year period beginning in 2015

    U.S. Geological Survey (USGS), Central Valley Regional Water Quality Control Board | July 27, 2018...
    Summary

    Surface water samples were collected by the U.S. Geological Survey and multiple cooperators during base flow/irrigation runoff and storm runoff conditions from 12...

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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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  • Effects of wildfire on benthic macroinvertebrate assemblages in Southern California streams and implications for bioassessment monitoring programs

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    Effects of wildfire on benthic macroinvertebrate assemblages in Southern California streams and implications for bioassessment monitoring programs

    California State Water Resources Control Board | June 13, 2012...
    Summary

    Wildfires are common in arid regions of southern California, sometimes burning as much as half a million acres in a season. These fires...

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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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  • Evaluation of a Ground-Water Flow and Transport Model of the Upper Coachella Valley, California

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    Evaluation of a Ground-Water Flow and Transport Model of the Upper Coachella Valley, California

    U.S. Geological Survey; California Regional Water Quality Control Board, Colorado River Basin Region | June 25, 1992...
    Summary

    A geohydrologic data base was compiled to evaluate the changes in ground-water conditions in the upper Coachella Valley, California, since 1978, when the...

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  • Evaluation of Processes Affecting 1,2-Dibromo-3-Chloropropane (DBCP) Concentrations in Ground Water in the Eastern San Joaquin Valley, California: Analysis of Chemical Data and Ground-Water Flow and Transport Simulations

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    Evaluation of Processes Affecting 1,2-Dibromo-3-Chloropropane (DBCP) Concentrations in Ground Water in the Eastern San Joaquin Valley, California: Analysis of Chemical Data and Ground-Water Flow and Transport Simulations

    U.S. Geological Survey, University of California - Davis | December 17, 1999...
    Summary

    Future use of the sole-source aquifer near Fresno in the eastern San Joaquin Valley, California, will depend, in part, on how long 1,2-dibromo-3-chloropropane...

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  • Evaluation of the California State Water Resource Control Board’s Bioassessment Program

    Evaluation of the California State Water Resource Control Board’s Bioassessment Program

    California State Water Resources Control Board | May 15, 2009...
    Summary

    The State of California’s bioassessment, monitoring and assessment (M&A), and water quality standards (WQS) programs were reviewed in January 2008 using the U.S....

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