Table 15. — ^".-.'ater quality conporison. 

 Colunbla Hiver at Northport, 191C-11 (U.S.G.S.) 

 In ?.?.•■:. 



Jan 



F9b. 



H»r. 



April May June July Aug. 3epit. Pet. Not. 



Dee, 



1 Each sample represents conposlte of 10 or more daily samples 



2 As p.p.m. CaCOs 



3 Compated from Ca and Mg as CsCO^ 



Table I6. — Water quality comparisons. 

 Columbia River at Pasco, 1910-11 (U.S.G.C.) 



Jan. Feb. Mar. April Hay Jxata Jnlj Aug. Sept. 



Oct. 



Nor. Dec. 



Tlaea Sampled 

 Flow X 1,000 

 Total Am. 

 Sulfate 

 Color 

 Turbidity 

 Total Hardiiess 

 Ma + K 

 Ca ♦ Mg 

 Total Solids 

 Iron (Fe) 



Columbia River at Pasco, 1951.-56 (University of Washington) 



Tines Sampled 

 Flow X 1,000 

 Total Alk. 

 Sulfate 

 Color 

 Turbidity 

 Total SoUds 

 Na ♦ K 

 Ca + Mg 

 Iron (Fe) 

 Total Hardness 



1 Each sample represents composite of 10 daily samples 



2 Computed as p.p.ra. CaCOj from Ca and Mg content 



3 Each sample represents composite of 2 or more individual samples 



70 



