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Watersheds
Delaware River Watershed
CITIZENS’ BUSINESS: 1939-1946
Diagram Showing Decreased Amount of Dissolved Oxygen in Delaware River, 1913
Delaware River at Arch Street from the New Jersey side, 1914
Cohocksink Sewer System outlet at Laurel Street
Bacteria in Delaware River, Torresdale Filters, 1913
Pennypack Sewage Treatment Works, 1914