Category:Water treatment plants in Pennsylvania
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Media in category "Water treatment plants in Pennsylvania"
The following 3 files are in this category, out of 3 total.
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Constructin of the Upper Roxborough Filters.jpg 2,409 × 771; 248 KB
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Pittsburgh Highland Park Reservoir No.1 Membrane Filtration Plant.jpg 3,024 × 4,032; 1.65 MB
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Waterworks in Pittsburgh.jpg 2,048 × 1,365; 1.54 MB