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Glyphosate and aminomethylphosphonic acid (AMPA) in National Water Quality Network Streams and Rivers in the U.S., Water Years 2015-2017

Metadata Updated: July 6, 2024

The U.S. Geological Survey (USGS) National Water Quality Network - Rivers and Streams (NWQN) is comprised of 110 surface-water monitoring sites designed to track ambient water-quality conditions across the nation. Although numerous constituents, including pesticides, have been collected at many of these sites since 1991, glyphosate and its metabolite aminomethylphosphonic acid (AMPA) were not routinely measured in NWQN water samples prior to 2014. Because of the widespread use of glyphosate for agricultural and nonagricultural applications, in 2014, these two compounds were added to the NWQN. This dataset includes concentrations of glyphosate and AMPA from water samples collected from 2015 through 2017 at 70 NWQN sites that passed screening criteria. It is a companion to the larger work (Medalie and others, 2019) which characterizes the regional distribution of glyphosate and AMPA detection frequencies and concentrations in water and examines their association with watershed size and land use. This dataset is comprised of 5 tables: Table1.NWQN.SiteInformation.txt, Table2.Glyphosate.AMPA.SampleConc.txt, Table3.Glyphosate.AMPA.AnnualData.txt, Table4.GlyphosateAgUse.txt, and Table5.LandUseClass.txt

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024
Publisher U.S. Geological Survey
Identifier USGS:5d8a1757e4b0c4f70d0ae50b
Data Last Modified 20200818
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 51fde535-b35a-449f-a4e0-aaba6feecad0
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -127.9223,22.5929,-65.0234,50.6301
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash fbf3fd6ca14df8760e0180db5e0b8ccfafb2f2fbfb7bc7643cf16e1eb99646ca
Source Schema Version 1.1
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