Table 40 



Number of Municipal and Industrial Sources of Pollution in the Major 



Source: Buswell, 1927: 9. 



exclusive of the Metropolitan Sanitary District of Chicago. 



Upper Illinois River to Vermilion River mouth. 



Vermilion River mouth to Sangamon River mouth. 



Sangamon River mouth to Illinois River mouth. 



Wisconsin border to Moline, Illinois. 



Moline, Illinois to Hamilton, Illinois. 

 S Hamilton, Illinois to Illinois River mouth. 



Illinois River mouth to Ohio River mouth. 



131 



