Is PENNICHUCK WATER WORKS's water safe to drink?
PENNICHUCK WATER WORKS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 88,853 people through 27,007 service connections.
Ranked against every other system in this dataset
2 total violations and 1 health-based ones put PENNICHUCK WATER WORKS at the 30th percentile nationally for violation burden, rank 9,076 of 12,903.
Against the NH average
NH's 62 covered systems average 8.6 health-based violations each; PENNICHUCK WATER WORKS carries 1, not more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
PENNICHUCK WATER WORKS's most recent violation on record is dated 2008-01-10, with the most recent health-based one dated 2002-01-08. Last reported to EPA: 06/23/2026.
The concern categories on record
PENNICHUCK WATER WORKS's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Microbial contamination / treatment technique - flagged from: Surface Water Treatment Rule
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What PENNICHUCK WATER WORKS's record does not cover
PENNICHUCK WATER WORKS's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 2 logged violations can see. The guide to what this data misses covers that gap.