[Parameters: Topic='TERRESTRIAL HYDROSPHERE', Term='GROUND WATER', Variable_Level_1='GROUNDWATER CHEMISTRY']
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Arsenic in ground water of the United States
Entry ID:
USGS_ARSENIC_H2O
Summary
Abstract:
[From Arsenic in ground water of the United States,
http://water.usgs.gov/nawqa/trace/arsenic/ Arsenic is a naturally occurring element in the environment. Arsenic in ground water is largely the result of minerals dissolving naturally from weathered rocks and soils. Several types of cancer have been linked to arsenic in water. The US Environmental Protection Agency is currently reviewing the maximum contaminant level of arsenic permitted in drinking water, and will likely lower it, as recommended last year by the National Research Council. The USGS has developed a map that shows where and to what extent arsenic occurs in ground water across the country. Highest concentrations were found throughout the West and in parts of the Midwest and Northeast.
Related URL
Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
Data Set Citation
Dataset Originator/Creator:
Cartography and Spatial Data Services, U.S. Fish & Wildlife Service
Dataset Title:
Rachel Carson Upper Wells Division National Wildlife Refuge Boundary Data
Dataset Release Date:
2000-04-21
Dataset Release Place:
Hadley, MA
Dataset Publisher:
U.S. Fish & Wildlife Service
Data Presentation Form:
GIS map
Online Resource:
http://picard.fws.gov/metadata.html#Maine
Parent DIF
This data set description is a member of a collection. The
collection is described in
USFWS_CSDS_NWR Location Keywords
Science Keywords
ISO Topic Category
Quality
Digital refuge boundaries are plotted with arc and polygon
attributes, then compared to USFWS Realty status maps, survey documents, and collateral information for coding accuracy. Three levels of quality-control review are conducted (Cartography and Spatial Data Services, Realty Management Branch, Refuge Staff) with corrections being incorporated after each review ... 
Access Constraints
None
Use Constraints
Refuge boundary data were compiled for resource applications. It is
inappropriate to use these data in legal situations, or other applications where spatial error cannot exceed the USGS 7.5-minute mapping standards. Ancillary Keywords
Data Set Progress
COMPLETE
Originating Center
Data Center
Distribution
Distribution Media:
electronic
Distribution Format:
ArcInfo export format
Fees:
No fees
Personnel
Role:
DIF AUTHOR
Phone:
(301) 614-6898
Fax:
301-614-5268
Email:
Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Creation and Review Dates
DIF Creation Date:
2002-10-08
Last DIF Revision Date:
2008-04-14
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