n 



o 



b. 

 >u 



o 



Si 



t 



o 

 u 



o o 



a? 



X 

 a. 



o < 



2i 



u < 



X 



JAN FEB. MAR. APR MAY JUN. JUL AUG SEP 



YAKIMA RIVER AT ENTERPRISE 



Average Monthly Water Quality 



1954-1957 



OCT NOV. DEC. 



FIG. 13 



37 



