Outhouse over the Schuylkill near Pottstown
McConnell Germ-Proof Filters ad
Bureau of Water Spring Garden Testing Station, 1901
Jar of raw sewage before treatment, 2000
Northeast Sewage Plant opening, 1951
Allegheny Avenue Sewer at Pier 126, 1918
Outside Sprinkling Filters, Spring Garden Sewage Experiment Station, 1911
Water Before and After Roxborough
State Road triple pipeline construction, 1904
Upper Roxborough Filter Beds Complete, 1903