Project Contacts
Chris Konrad
(cpkonrad@usgs.gov)
(253) 552-1634

Mark Mastin
(mcmastin@usgs.gov)
(253) 552-1609

Frank Voss
(fdvoss@usgs.gov)
(253) 552-1689


934 Broadway,
Suite 300
Tacoma, WA 98402

Methow River Basin

Scientific Topics - Water Quality

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The U.S. Geological Survey (USGS) has been collecting and analyzing ground- and surface-water samples to assess ambient water-quality conditions in the Methow River Basin. Physical properties of temperature, pH, specific conductance, and dissolved oxygen were measured, and samples were collected to analyze for concentrations of nitrate and chloride. A subset of the samples was analyzed for major ions and selected metals. The data will provide a baseline for water-quality conditions that can be referenced in future studies.

Surface-Water Quality

Nineteen surface-water sites in the Methow River Basin were sampled September 17-21, 2001. Samples were collected from 5 sites on the mainstem of the Methow River, 2 sites on the Twisp River, 6 tributaries to the upper Methow River, 3 sites on the Chewuch River or its tributaries, and 3 tributaries to the lower Methow River.

Ground-Water Quality

Eighty-nine ground-water sites in the Methow River Basin were sampled June 16-20, 2001. Samples were randomly selected from all hydrogeologic locations to assess the general quality of ground water in the basin.