California Water Science Center

Home
Projects
Publications
Water Data
Drought
Webcams
News
Cooperators
Information Requests
Navigation and SearchHide Navigation

National Water-Quality Assessment Program (NAWQA)

NAWQA Study Units

In 1991 the U.S. Geological Survey initiated the National Water-Quality Assessment (NAWQA) Program to assess the status 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 will be conducted in 59 areas-- called "study units"-- throughout the Nation to provide a framework for national and regional water-quality assessment. Together, these areas account for 60 to 70 percent of the Nation's water use and population served by public water supplies, and cover about one-half of the land area of the Nation.

NAWQA Studies in California


National Studies


Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://ca.water.usgs.gov/nawqa.html
Page Contact Information: GS-W-CAWSC_WWW@usgs.gov
Page Last Modified: Thursday, 23-Feb-2012 16:05:57 EST