Table 6. — Water quality summary - monthly average. 

 [Chemical characteristics in mg. /liter where applicable] 



Sta: Columbia R. at IfcWary Daa 



Summary Ptrlod: 19 5^^ - 55 - 5 6 - 57 



Sta. No. 



D««ignatlon : C- 292.0 



^ D. 0. satur. is at sea level; alkalinity and hardness as equivalent CaCOoJ 

 conductivity in mlcromhos per cm. at 25 ''c. 



1 - 1954 4 - 1957 



2 - 1955 5 - ATg. monthly at McNary Dam 



3 - 1956 



27 



