<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>William M. Alley</dc:contributor>
  <dc:contributor>Martin E. Gurtz</dc:contributor>
  <dc:creator>Robert J. Gilliom</dc:creator>
  <dc:date>1995</dc:date>
  <dc:description>The National Water-Quality Assessment Program assesses the status of and trends in the quality of the Nation's ground- and surface-water resources. The occurrence and distribution assessment component characterizes broad-scale water-quality conditions in relation to major contaminant sources and background conditions in each study area. The surface-water design focuses on streams. The ground-water design focuses on major aquifers, with emphasis on recently recharged ground water associated with human activities.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/cir1112</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey ;&#13;
U.S.G.S. Information Services [distributor],</dc:publisher>
  <dc:title>Design of the National Water-Quality Assessment Program; occurrence and distribution of water-quality conditions</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>