United States Geological Survey
http://water.usgs.gov/
Blue Ridge Aquifer
http://capp.water.usgs.gov/gwa/ch_l/L-text4.html
Information from NC State
http://www.ces.ncsu.edu/disaster/drought/
http://www.bae.ncsu.edu/programs/extension/wqg/publications.html
Other Links
http://www.ces.ncsu.edu/depts/hort/consumer/hortinternet/water_quality.html
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