22 Indiana water districts with results read from their own annual water quality report or EPA testing, largest first.
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- Citizens Water - Indianapolis866,928 people · 21 results
- Fort Wayne - 3 Rivers Filtration Plant269,994 people · 22 results
- Carmel Water Department90,434 people · 25 results
- Hammond Water Works Department78,384 people · 13 results
- Lafayette Water Works70,835 people · 2 results
- Columbus Municipal Utility56,490 people · 9 results
- Purdue Univ. Water Works55,000 people · 11 results
- Citizens Water of Westfield, LLC48,978 people · 17 results
- Elkhart Public Works and Utilities45,698 people · 13 results
- Plainfield Water Works34,477 people · 10 results
- Crown Point Water Works30,000 people · 12 results
- Marion City Water Works28,363 people · 12 results
- East Chicago Water Works26,370 people · 9 results
- Brownsburg Water Works23,750 people · 12 results
- Highland Water Works23,546 people · 5 results
- St. John Municipal Water Utility17,000 people · 9 results
- Dyer Water Department16,800 people · 7 results
- Frankfort Water Works16,422 people · 10 results
- Sellersburg Water Department15,655 people · 1 results
- Jackson County Water Utility13,667 people · 5 results
- Greensburg Municipal Water Works12,650 people · 4 results
- Bluffton Utilities Water Dept3 results