Watersheds Delaware River Watershed

Philadelphia harbor and rivers chart with points of interest

Map of Philadelphia Harbor, Delaware and Schuylkill, 1912

Black-and-white line graph showing two jagged lines on a grid

Diagram Showing Decreased Amount of Dissolved Oxygen in Delaware River, 1913

Black-and-white image of a body of water with trees and shoreline in the far distance

Delaware River at Arch Street from the New Jersey side, 1914

Black-and-white image showing sewer outlet, retaining walls and body of water

Cohocksink Sewer System outlet at Laurel Street

Black-and-white image of a table with numbers in columns

Bacteria in Delaware River, Torresdale Filters, 1913

Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia

Swimmers at Pier 126, Delaware River July 15, 1918

Swimmers at Pier 126, Delaware River, July 15, 1918

Photo of Allegheny Avenue Sewer, Pier 126, Delaware River, July 15, 1918

Allegheny Avenue Sewer at Pier 126, 1918

The Pennypack Sewage Treatment Works in 1914

Pennypack Sewage Treatment Works, 1914