116 



COXSERVATION DEPARTMENT 



en cji 

 c* O 



o 



(0 



Disc^lved Oxygen - Per cent of Saturation 



50 75 ^100 125 



Stony Brook 



i^arysburg 



Attica 



Rapids 



Barge Canal June 



Tonawanda 



Niagara 





River 



