![Diagram showing the Philadelphia Water Department's water treatment process](https://waterhistoryphl.org/wp-content/uploads/DrinkingWaterTTMNT_diagram_edit.jpg?w=300)
![Diagram showing the Philadelphia Water Department's water treatment process](https://waterhistoryphl.org/wp-content/uploads/DrinkingWaterTTMNT_diagram_edit.jpg?w=300)
![Cartoon depicting William Penn toasting the Devil with a glass of filtered water](https://waterhistoryphl.org/wp-content/uploads/2004.012.0131_Typhoid_SpeedPartingGuest_1909_rev.jpg?w=300)
“Speeding the Parting Guest,” Feb. 25, 1909
![William Penn balks at drinking the "mixed drink" offered him: Schuylkill water, mixed with pollution from the upstream sources named. Editorial cartoon by Fred Morgan, Philadelphia Inquirer, April 6, 1899. One of a series of cartoons drawn by Morgan protesting the state of the city's drinking water and trying to encourage the passage of legislation authorizing the construction of a water filtration system.](https://waterhistoryphl.org/wp-content/uploads/MixedDrink_Inq_1899-04-06_Morgan_crop2.jpg?w=300)
“A Decidedly Mixed Drink,” April 6, 1899
![Black-and-white image of a table with numbers in columns](https://waterhistoryphl.org/wp-content/uploads/bacteria-in-delaware-river-torresdale-filters-1913.jpg?w=300)
Bacteria in Delaware River, Torresdale Filters, 1913
![Belmont Filters construction 1903](https://waterhistoryphl.org/wp-content/uploads/D.2_FINAL_1986.002.1075-scaled.jpg?w=300)
Belmont Filters construction, 1903
![Finished Upper Roxborough filters, 1903](https://waterhistoryphl.org/wp-content/uploads/D.1b_FINAL_1986.002.1032-1-scaled.jpg?w=300)
Finished Upper Roxborough filters, 1903
![Upper Roxborough filter beds](https://waterhistoryphl.org/wp-content/uploads/D.1a_FINAL_1986.002.0660-61-62-1.jpg?w=300)
Upper Roxborough filter beds under construction, July 1902
![A.C. Abbott, MD](https://waterhistoryphl.org/wp-content/uploads/C.5f_FINAL_Abbott_Photo_UPaArchives_edit.jpg?w=300)
A.C. Abbott, MD
![McDonnell filter advertisement](https://waterhistoryphl.org/wp-content/uploads/B.3_SCAN_waterdept002_300dpi.jpg?w=300)
McConnell Germ-Proof Filters ad
![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
![Black-and-white photograph showing the completed Upper Roxborough Filter system. Vaulted concrete ceiling with beds of filter sand.](https://waterhistoryphl.org/wp-content/uploads/D.1b_FINAL_1986.002.1032.jpg?w=300)