Map Information:

Map Title:
Susceptibility of Source Water to Community Water-Supply Wells in NJ to Contamination by Inorganic Constituents

Name(s) of Author(s):
Ed Apalinski

Organization:
NJDEP / Land Use Management / Division of Water Supply / Bureau of Safe Drinking Water

Email Address:
Edward.apalinski@dep.state.nj.us

Telephone Number:
609-984-7968

Software Used to Make Map:
ArcGIS 8.3

Platform on Which
Software Was Used:
Windows

Plotter Used to Print Map:
Hewlett Packard 1055CM

Data Sources:

Physiographic Provinces, Public Community Water Supply Wells, SWAP Inorganic Susceptibility Assessments

Map Description:

As part of the Source Water Assessment Program (SWAP) susceptibility assessment models were developed to predict the susceptibility of source water to community water-supply (CWS) wells in New Jersey to contamination by inorganic constituents. Metals and major constituents were used to develop the SWAP inorganic model. A separate report and model is available for nitrate. Susceptibility is defined by variables describing hydrogeologic sensitivity and potential contaminant-use intensity within the area contributing water to a well. The models were developed by using water-quality data from well samples collected and analyzed by the U.S. Geological Survey. Individual models were developed for 6 of 14 constituents with primary maximum contaminant levels (MCLs): arsenic, barium, beryllium, fluoride, lead, and mercury. The susceptibility ratings for the inorganic constituents group are based on individual constituent susceptibility assessment models. The constituent group rating for a well is the highest susceptibility rating of the individual constituent ratings. A Low rating is susceptible at < 10% of the MCL, a Medium rating is susceptible at => 10% and < 50% of the MCL, and a High rating is susceptible at => 50% of the MCL. Of the 2,237 community water supply wells, the susceptibility to inorganic constituents was low for 789 (35 percent), medium for 851 (38 percent), and high for 597 (27 percent). Susceptibility ratings for arsenic were highest in the Piedmont Physiographic Province and are likely associated with geologic sources rather than with human activities. Barium concentrations also were highest in the Piedmont, and may be the result of natural sources and agricultural practices. Beryllium, lead, and mercury were frequently detected in low pH water typical of the Coastal Plain aquifers of New Jersey.

Map Title:	Susceptibility of Source Water to Community Water-Supply Wells in NJ to Contamination by Inorganic Constituents
Name(s) of Author(s):	Ed Apalinski
Organization:	NJDEP / Land Use Management / Division of Water Supply / Bureau of Safe Drinking Water
Email Address:	Edward.apalinski@dep.state.nj.us
Telephone Number:	609-984-7968
Software Used to Make Map:	ArcGIS 8.3
Platform on Which Software Was Used:	Windows
Plotter Used to Print Map:	Hewlett Packard 1055CM
Data Sources:	Physiographic Provinces, Public Community Water Supply Wells, SWAP Inorganic Susceptibility Assessments
Map Description:	As part of the Source Water Assessment Program (SWAP) susceptibility assessment models were developed to predict the susceptibility of source water to community water-supply (CWS) wells in New Jersey to contamination by inorganic constituents. Metals and major constituents were used to develop the SWAP inorganic model. A separate report and model is available for nitrate. Susceptibility is defined by variables describing hydrogeologic sensitivity and potential contaminant-use intensity within the area contributing water to a well. The models were developed by using water-quality data from well samples collected and analyzed by the U.S. Geological Survey. Individual models were developed for 6 of 14 constituents with primary maximum contaminant levels (MCLs): arsenic, barium, beryllium, fluoride, lead, and mercury. The susceptibility ratings for the inorganic constituents group are based on individual constituent susceptibility assessment models. The constituent group rating for a well is the highest susceptibility rating of the individual constituent ratings. A Low rating is susceptible at < 10% of the MCL, a Medium rating is susceptible at => 10% and < 50% of the MCL, and a High rating is susceptible at => 50% of the MCL. Of the 2,237 community water supply wells, the susceptibility to inorganic constituents was low for 789 (35 percent), medium for 851 (38 percent), and high for 597 (27 percent). Susceptibility ratings for arsenic were highest in the Piedmont Physiographic Province and are likely associated with geologic sources rather than with human activities. Barium concentrations also were highest in the Piedmont, and may be the result of natural sources and agricultural practices. Beryllium, lead, and mercury were frequently detected in low pH water typical of the Coastal Plain aquifers of New Jersey.