California Water Science Center
In 1991 the U.S. Geological Survey initiated the National Water-Quality Assessment(NAWQA) Program.
The long term goals of this program are to assess the status of and trends in the quality of
freshwater streams and aquifers, and to provide a sound understanding of the natural and human
factors that affect the quality of these resources. As part of the program, investigations are
conducted within "study units" throughout the Nation to provide a framework for national and
regional water-quality assessment.
The San Joaquin-Tulare Basins(SANJ) study unit, located in central California, was a part of the first decadal cycle of the program investigations. The SANJ intensively investigated the quality of water resources in the study unit in order to establish existing water quality conditions of streams and aquifers. A summary of the first cycle findings can be found in Dubrovsky and others (1998).
(Photograph by Larry Brown, U.S. Geological Survey)
If you have questions and comments related to the San Joaquin-Tulare Basins NAWQA study, contact: Joseph Domagalski(email@example.com) or write:
SANJ NAWQA Project Chief
U.S. Geological Survey
Placer Hall, 6000 J Street
Sacramento, California 95819-6129