 
		 
		 
		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
