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Map of Arsenic concentrations in groundwater of the United States

Metadata Updated: March 22, 2024

The map graphic image at illustrates arsenic values, in micrograms per liter, for groundwater samples from about 31,000 wells and springs in 49 states compiled by the United States Geological Survey (USGS). The map graphic illustrates an updated version of figure 1 from Ryker (2001). Cited Reference: Ryker, S.J., Nov. 2001, Mapping arsenic in groundwater-- A real need, but a hard problem: Geotimes Newsmagazine of the Earth Sciences, v. 46 no. 11, p. 34-36 at An excel tabular data file, a txt file, along with a GIS shape file of arsenic concentrations (20,043 samples collected by the USGS) for a subset of the sites shown on the map. Samples were collected between 1973 and 2001 and are provided for download.

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.

Downloads & Resources


Metadata Created Date June 1, 2023
Metadata Updated Date March 22, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date March 22, 2024
Publisher U.S. Geological Survey
Identifier USGS:95456880-0d8d-4398-b82e-674672bad2bc
Data Last Modified 20201117
Category geospatial
Category Tag 16E15F51 D96E 4051 9124 75665Abdc6Ff "Human Health"
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id f41563d8-ffdd-4a71-9491-8a9834070adf
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -158.631946,25.3905,-66.991122,68.143334
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 678df2638dffd3fad37b80af0d2c4bcdd2487f502dddaf265bde8d87ca2e0439
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -158.631946, 25.3905, -158.631946, 68.143334, -66.991122, 68.143334, -66.991122, 25.3905, -158.631946, 25.3905}

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