Description
The map graphic image at https://www.sciencebase.gov/catalog/file/get/63140561d34e36012efa2b7f?name=arsenic_map.png 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
http://www.agiweb.org/geotimes/nov01/feature_Asmap.html. 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.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| Original Metadata | XML | The metadata original format | Open resource |
| Digital Data | XML | Landing page for access to the data | Open resource |