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    • EPA Long-Term Monitoring of Acidified Surface Waters

    Metadata Updated: October 25, 2025

    This dataset compiled surface water chemistry data from 1980 to 2024. Data were collected in four regions in the eastern United States (Virginia streams, New York lakes and streams, Maine and New Hampshire lakes, and Vermont lakes). These data are used to calculate trends in surface water chemistry to assess aquatic ecosystem response to changes in sulfur and nitrogen deposition. Water chemistry in this data can be influenced by the ambient flow conditions. To be included in the dataset, sites needed to have regular sampling (at least once per year for 20 years). Citation information for this dataset can be found in Data.gov's References section.

    Access & Use Information

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

    Downloads & Resources

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date October 25, 2025

    Metadata Source

    Harvested from EPA ScienceHub

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date October 25, 2025
    Publisher U.S. Environmental Protection Agency
    Maintainer
    Identifier https://doi.org/10.23719/1518546
    Data Last Modified 2025-10-01
    Public Access Level public
    Bureau Code 020:00
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Data Dictionary https://pasteur.epa.gov/uploads/10.23719/1518546/documents/Data_Dictionary_2025_9_23.xlsx
    Data Dictionary Type application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
    Harvest Object Id 55ad90f6-ca72-44fe-b2cb-6988d0c852f2
    Harvest Source Id 04b59eaf-ae53-4066-93db-80f2ed0df446
    Harvest Source Title EPA ScienceHub
    License https://pasteur.epa.gov/license/sciencehub-license.html
    Old Spatial -83.8225,36.4646,-66.5649,47.4872
    Program Code 020:000
    Publisher Hierarchy U.S. Government > U.S. Environmental Protection Agency
    Source Datajson Identifier True
    Source Hash 358d52231bf2365f664a7f63f6710a16954482cd9537c3923a0199d4c3c587e7
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -83.8225, 36.4646, -83.8225, 47.4872, -66.5649, 47.4872, -66.5649, 36.4646, -83.8225, 36.4646}

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