![Outhouse over Schuylkill near Pottstown](https://waterhistoryphl.org/wp-content/uploads/C.1_FINAL_Warwick-Furnace_editcrop.jpg?w=300)
![Outhouse over Schuylkill near Pottstown](https://waterhistoryphl.org/wp-content/uploads/C.1_FINAL_Warwick-Furnace_editcrop.jpg?w=300)
![36. [Laboratory] Left to right: raw water, settled water, filtered water, ca. 1943](https://waterhistoryphl.org/wp-content/uploads/2012.002.0036.jpg?w=300)
36. [Laboratory] Left to right: raw water, settled water, filtered water, ca. 1943
![35. [Laboratory] Turbidity test ca. 1943](https://waterhistoryphl.org/wp-content/uploads/2012.002.0035.jpg?w=300)
35. [Laboratory] Turbidity test ca. 1943
![Laboratory Alkalinity test, ca. 1943](https://waterhistoryphl.org/wp-content/uploads/2012.002.0034.jpg?w=300)
Laboratory Alkalinity test, ca. 1943
![32. [Laboratory] Bacteria count, ca. 1943](https://waterhistoryphl.org/wp-content/uploads/2012.002.0032.jpg?w=300)
32. [Laboratory] Bacteria count
![31. [Laboratory] Taste and odor test, ca. 1943 (2012.002.0031)](https://waterhistoryphl.org/wp-content/uploads/2012.002.0031.jpg?w=300)
31. [Laboratory] Taste and odor test
![Baldwin Locomotive Works, 1884](https://waterhistoryphl.org/wp-content/uploads/2004.007.0004-scaled.jpg?w=300)
Baldwin Locomotive Works
![Two bottles of water from a river, one dark with pollution and one clear after filtration](https://waterhistoryphl.org/wp-content/uploads/BeforeAfter_1986.002.1280.jpg?w=300)
Water Before and After Roxborough
![Henry Disston's Keystone Saw Works was located along the Delaware riverfront in Tacony. The black-and-white lithograph shows the factory's many smokestacks emitting smoke into the atmosphere.](https://waterhistoryphl.org/wp-content/uploads/Disston_20050170201_750w.jpg?w=300)