Groundwater Level - California
Hydrologic data for California, including groundwater levels, water quality, surface water flows, climatology, and water well logs.
wdl.water.ca.gov
Arid West Water Quality Research Project
Created to address concerns that water quality criteria and standards developed under the Clean Water Act were not always appropriate for use in arid and semiarid areas of the western U.S.
www.co.pima.az.us/wwm/wqrp
National Water Quality Assessment Program of the USGS
Surface- and ground-water quality analysis, bed-sediment chemistry, and aquatic ecology in the Upper Mississippi River Basin in Minnesota and Wisconsin.
wwwmn.cr.usgs.gov/umis
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