7 Idaho water districts with results read from their own annual water quality report or EPA testing, largest first.
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- Nampa City of100,200 people · 9 results
- Caldwell City of74,000 people · 12 results
- Idaho Falls City of69,450 people · 10 results
- Coeur D Alene City of54,115 people · 5 results
- Kuna City of32,038 people · 11 results
- Ammon City of17,338 people · 10 results
- Chubbuck City of15,842 people · 6 results