7 New Hampshire water districts with results read from their own annual water quality report or EPA testing, largest first.
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- Aquarion Water/Nh34,000 people · 13 results
- Portsmouth Water Works33,000 people · 9 results
- Keene Water Dept30,000 people · 11 results · 1 over a limit
- Dover Water Dept29,000 people · 2 results
- Merrimack Village Dist25,500 people · 8 results
- Rochester Water Dept25,000 people · 17 results
- Salem Water Dept21,000 people · 15 results