United States DepartsMnt of the Interior, Fred A. Seaton, Secretary 

 Fish and Wildlife Seirvlce, Amle J. Suomela, Coanlssloner 



WATER QUALITY STUDIBS IH THE 

 COLUMBIA RIVER BASIN 



by 



Robert 0. Sylvester, Project Supervisor 

 Associate Professor of Sanitary Engineering 

 University of Washington 



This work was financed by the Bureau of 

 CoBmercled Fisheries under Contract No. 

 ll^-19 -008-2419, with funds made avail- 

 able under the Act of July 1, 1954 (68 

 Stat. 376), conmonly known as the Sal- 

 tonstall-Kezmedy Act. 



Special Scientific Report— Fisheries No. 239 



Washington, D. C. 

 May 1958 



