Items

Historic resources from our archives - images, maps, documents, and more.

Diagram from sewage treatment plan for Philadelphia, 1912

Black-and-white photo of industrial tank installation with smokestacks and factories in the background

Emscher Tank Installation at Essen Nord, Germany

Black-and-white image of a tray with three compartments and four small glass cylinders

Drain water from sludges obtained from sedimentation, septic and Emscher tanks

Black-and-white image of a brick sewer outlet that drains into a creek with trees and a hill behind it

Thomas Run sewer outlet at Cobbs Creek