Wastewater Treatment Process diagram
Jar of raw sewage before treatment, 2000
Southeast Sewage Treatment Works diagram, 1955
Swimmers at Pier 126, Delaware River, July 15, 1918
Allegheny Avenue Sewer at Pier 126, 1918
Water Before and After Roxborough
State Road triple pipeline construction, 1904
Upper Roxborough Filter Beds Complete, 1903