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    • Coupling the dual-isotope indicators of water and nitrate indicates legacy groundwater pollution

    Metadata Updated: February 10, 2021

    Shallow groundwater samples were collected since 2006 for routine analysis by ODEQ from 16 domestic wells (installation dating from the 1970s) and 23 ODEQ groundwater monitoring wells (installation dating between 2003-2006) across the SWV-GWMA. In 2012, sampling and analysis for water isotopes (δH2O:2H-H2O and 18O-H2O) were added to the monitoring program. At that time, ODEQ collected samples quarterly in all wells. However, in 2016, ODEQ decreased sampling frequency to once a year (May/June) for all 39 wells, while 12 wells continued to be sampled every quarter. At the same time, sampling and analysis for NO3- isotopes (δNO3-: 15N-NO3- and 18O-NO3-) were added to the monitoring program. This study reports on the monitoring results through 2019, which includes 8 years of water isotope and 4 years for nitrate isotope data.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

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    Dates

    Metadata Created Date February 10, 2021
    Metadata Updated Date February 10, 2021

    Metadata Source

    Harvested from EPA ScienceHub

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date February 10, 2021
    Metadata Updated Date February 10, 2021
    Publisher U.S. EPA Office of Research and Development (ORD)
    Maintainer
    Identifier https://doi.org/10.23719/1519089
    Data Last Modified 2020-07-22
    Public Access Level public
    Bureau Code 020:00
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Harvest Object Id 43a4340e-91ca-4fa1-a0cd-88c73de10c11
    Harvest Source Id 04b59eaf-ae53-4066-93db-80f2ed0df446
    Harvest Source Title EPA ScienceHub
    License https://pasteur.epa.gov/license/sciencehub-license.html
    Program Code 020:000
    Publisher Hierarchy U.S. Government > U.S. Environmental Protection Agency > U.S. EPA Office of Research and Development (ORD)
    Source Datajson Identifier True
    Source Hash 85cdd74fd0ceb811f4745afd35b981bebc23e944
    Source Schema Version 1.1

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