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Historic resources from our archives - images, maps, documents, and more.
33. [Laboratory] Presumptive coli test
32. [Laboratory] Bacteria count
31. [Laboratory] Taste and odor test
29. Water sample collector [for laboratory]
11. Taking a water sample for laboratory ca. 1943
Northeast Sewage Plant opening, 1951
Southeast Sewage Treatment Works diagram, 1955
Plan for the Collection, Treatment and Disposal of Sewage, 1914
Outside Sprinkling Filters, Spring Garden Sewage Experiment Station, 1911
Water Before and After Roxborough
Upper Roxborough Filter Beds Complete, 1903
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