- Groundwater Level - California
Hydrologic data for California, including groundwater levels, water quality, surface water flows, climatology, and water well logs.
wdl.water.ca.gov
- Ground-Water Hydrology of Prairie Potholes in North Dakota
1972 geological research paper on the ground water level, movement, and quality of the prairie potholes.
www.lib.ndsu.nodak.edu/govdocs/text/potholes/585c.html
- 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
- Hudson River Basin National Water Quality Assessment
Water quality of surface water and ground water in the Hudson River basin is being investigated by the USGS .
wwwdnyalb.er.usgs.gov/projects/hdsn
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