| As of fiscal year 2005,
the National Irrigation Water Quality Program
has been inactive.
For further information regarding the program,
please "Contact Us" via the link
at the top of this page.
NIWQP Project/Study Area—
Sacramento Refuge Complex, California
LocationThe Sacramento Valley forms the northern part of California's Central Valley. The Sacramento Valley is bounded to the west by the Coast Ranges, to the east by the Sierra Nevada and Cascade Range, and to the north by the Klamath Mountains. (Detail map)
StatusBased on the studies at this Project, selenium concentrations in water and bottom sediment were well within national and regional baselines. Concentrations in biological tissues were not toxicologically significant except for heron and mallard eggs, which were slightly elevated above the guidelines for no clear risk. The NIWQP is no longer involved at this location.
Phases 2 and 3 DataChemical Data From Water:
ASCII - 8 KB .dat File or Microsoft Excel - 41 KB .xls File
ASCII - 10 KB .dat File or Microsoft Excel - 56 KB .xls File
ASCII - 33 KB .dat File or Microsoft Excel - 125 KB .xls File
ASCII - 27 KB .dat File or Microsoft Excel - 93 KB .xls File
DocumentsDileanis, P.D., Sorenson, S.K., Schwarzbach, S.E., and Maurer, T.C., 1992, Reconnaissance investigation of water quality, bottom sediment and biota associated with irrigation drainage in the Sacramento National Wildlife Refuge Complex, California, 1988-89: U.S. Geological Survey Water-Resources Investigations Report 92-4036, 79 p.