Cohocksink Sewer System outlet at Laurel Street
Bacteria in Delaware River, Torresdale Filters, 1913
Sewer Demand Taken to City Hall, 7/25/32
1779 Revolutionary War-era map of Philadelphia and environs
Centennial Exhibition situation plan, 1876
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
69th St. Sewer and Culvert across Lansdowne AVe.
Outhouse over the Schuylkill near Pottstown
Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912
Swimmers at Pier 126, Delaware River, July 15, 1918