State of the Schuylkill River in 1876: Sewage pollution and possible remedies
The Water and Drainage History of Philadelphia, Part 7
Pipes, distribution mains, transmission mains, filtration plants, pumping stations, and all other appurtenances, either above or underground, that relate to providing drinking water to homes and businesses. In tandem with sewer systems, properly-designed water supply systems are what make densely-populated urban areas possible.