National Water-Quality Assessment Program (U. S.)

• Water Quality in the Western Lake Michigan Drainages, Wisconsin and Michigan, 1992-95 (U.S. Geological Survey Circular, 1156)
• Ground-Water Quality Assessment of the Carson River Basin, Nevada, and California
• Water Quality in the Central Columbia Plateau, Washington, and Idaho, 1992-95 (U.S. Geological Survey Circular, 1144)
• Water Quality in the Georgia-Florida Coastal Plain, Georgia and Florida, 1992-96 (U.S. Geological Survey Circular, 1151)
• Water Quality in the Lower Susquehanna River Basin, Pennsylvania and Maryland, 1992-95
• Water Quality in the Ozark Plateaus, Arkansas, Kansas, Missouri, and Oklahoma
• Water Quality in the Red River of the North Basin, Minnesota, North Dakota, and South Dakota, 1992-95 (U.S. Geological Survey Circular, 1169)
• Water quality in the Upper Mississippi River Basin, Minnesota, Wisconsin, South Dakota, Iowa, and North Dakota, 1995-98
• Water quality in the Upper Tennessee River Basin, Tennessee, North Carolina, Virginia, and Georgia, 1994-98
• Water Quality in the Willamette Basin, Oregon, 1991-95 (U.S. Geological Survey Circular, 1161)