Relation between selected well-construction characteristics and occurrence of bacteria in private household-supply wells, south-central and southeastern Pennsylvania

by Zimmerman, Tammy M.
Published: U.S. Dept. of the Interior, U.S. Geological Survey ; Branch of Information Services [distributor], 2001

Microbiological quality of water from noncommunity supply wells in carbonate and crystalline aquifers of Pennsylvania

by Lindsey, Bruce D., 1962-
Published: U.S. Dept. of the Interior, U.S. Geological Survey ; U.S. Geological Survey, Branch of Information Services [distributor], 2002

Water quality in the principal aquifers of the Piedmont, Blue Ridge, and Valley and Ridge regions, eastern United States, 1993-2009

by Lindsey, Bruce D., 1962-
Published: U.S. Geological Survey, 2014