GROUND WATER ATLAS of the UNITED STATES
Alaska, Hawaii, Puerto Rico and the U. S. Virgin Islands
HA 730-N
Puerto Rico and the U. S. Virgin Islands Regional Summary
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Ground-Water Quality
Figure 75 Graphs showing the chemical constituents in
water from aquifers of Puerto Rico and the Virgin Islands (39K)
editable eps file N075.eps.gz
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Figure 76 Map showing levels of dissolved-solids
concentrations in water from the North Coast Limestone aquifer
system (18K)
editable eps file N076.eps.gz
(85K compressed)
Figure 77 Diagrammatic section showing the
saltwater-freshwater interface within the upper aquifer of the
North Coast Limestone aquifer system (46K)
editable eps file N077.eps.gz
(325K compressed)
editable eps file N075.eps.gz
(71K compressed) 
editable eps file N076.eps.gz
(85K compressed) 
editable eps file N077.eps.gz
(325K compressed)