TABLE OF CONTENTS 



Page 



Introduction 1 



General discussion of factors affecting water quality .... 1 



Topography 1 



Stream flow characteristics 3 



Geology 5 



Soil mamtle 5 



Climate 5 



Land use and vegetjJL cover 6 



Population 7 



Industry 7 



Ground water 8 



Irrigation , 8 



Sampling for determination of water qualities 8 



Scunpling stations 8 



Physical tests 8 



Chemical tests 11 



Sampling procedure 11 



Frequency of sampling 11 



Water quality in the Wenatchee River Basin 11 



Nason Creek (Station 1) 11 



Chiwawa River (Station 2) 14 



Lake Wenatchee (Station 3) 17 



Wenatchee River at Plain (Station 4) 20 



Wenatchee River at Tumwater Canyon (Station 5) 23 



Wenatchee River at Sleepy Hollow (Station 6) 26 



Wenatchee River progressing downstream from Lake 



Wenatchee 26 



Comparison of water queility, Wenatchee River and 



Columbia River 30 



