M 

 U 



U. 

 _l 

 3 

 OT 



O 



O 



u 



>■ 

 o 



u 



3 

 O 

 Z 



o 

 u 



o 



M 



< 



o 



JAN FEB MAR APR MAY JUN JUL AUG SEP OCT 



WENATCHEE RIVER BELOW PLAIN 



Average Monthly Water Quality 

 1955 - 1957 



NOV DEC 



FIG. 30 



63 



