199 
in 1897, and states the pumpage in gallons per day, the popula- 
tion, and pertinent data concerning the systems in discussion. 
The population is that reported by the census of 1890, and the 
figures for 1897 would show a considerable increase owing to 
the rapid growth of the urban population in the vicinity of 
Chicago during the past decade. The second part of the table 
includes the smaller cities with water-works but without de- 
veloped sewage systems. These do not contribute to the stream 
POPULATION AND PUMPAGE IN CITIES WITH SEWAGE SYSTEMS. 
City Population in 1890 7 es ea Remarks. 
Illinois 
Aurora 19,688 1,338,570 |Combined sewage system 
Chicago 849,850 520,275,109 | Population 1,099,850,from 
which 250,000 was de- 
ducted for area of City 
draining directly into 
Lake Michigan. Pump- 
age is that at Bridge- 
port. 
Elgin 17,823 1,143,488 |Combined sewage system 
Hinsdale 1,584 124,000 
Joliet 23,264 2,500,000 |Part separate, part com- 
bined systems. 
Kankakee 9,025 1,200,000 
LaGrange 2,314 223,609 |Combined sewage system 
La Salle 9,855 1,503,835 
Lemont — 600,000 |Population not given in 
1890 apart from that of 
township. 
Mendota 3,542 205,479 |Separate sewage system. 
Ottawa 9,985 511,000 |Sewage system incompl't. 
Pekin 6,347 750,000 zs ss “s 
Peoria 41,024 5,000,000 
Peru 5,550 216,183 |Sewage system incompl't. 
Pontiac 2,784 750,000 |Pumpage estimate re- 
duced from 2,000,000 
gal. 
Streator 11,414 2,000,000 
Utica 1,094 720,000 |Water supply from ar- 
tesian wells. 
Watseka 2,017 150,000 |Pumpage estimated. 
Wheaton 1,622 70,000 |Sewage system incomp!l't. 
Wisconsin 
Waukesha 6,321 500,000 |Separate sewage system. 
Indiana 
La Porte 7,126 747,788 
Total 1,032,229 540,529,061 Total pumpage, 442.17 cu. 
ft. per sec. 
