o 

 u 



s 



w 



s 



o 

 u 



+ 



>■ 



> 



3 

 O 





« 



100 



400 



eoo 



200 



JAN FEB MAR. 



APR MAY JUN JUL AUG SEP 



SNAKE RIVER AT MOUTH 



Average Monthly Water Quality 



1954 - 1957 



OCT. NOV. DEC. 



FIG. 10 



32 



