This map shows the layout of sewers in Chicago at the end of 1857. Chicago built one of the first sewage systems in the United States to treat wastewater. Photo: C.S. Chesbrough, Chicago sewerage report of the results of examinations made in relation to sewerage in several European cities, in the winter of 1856-57, Chicago, 1858.

map of the layout of sewers in Chicago at the end of 1857

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