LOCKE LAKE: EPA violation history, explained
LOCKE LAKE has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 2,308, over 923 connections.
How this compares nationally
Out of 12,903 systems in this dataset, LOCKE LAKE ranks 2,083th by violation burden (84th percentile) - 74 violations total, 9 health-baseds.
How LOCKE LAKE compares within NH
NH's 62 covered systems average 8.6 health-based violations each; LOCKE LAKE carries 9, more than typical for the state. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for LOCKE LAKE is from 2018-01-04 (health-based: 2018-01-04). Last reported to EPA: 06/23/2026.
What kind of problem, specifically
LOCKE LAKE'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: Coliform (TCR)
- Other regulated metals - flagged from: Arsenic
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 this data is and is not
This is what LOCKE LAKE reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. Between the utility's meter and LOCKE LAKE's customers' taps is household plumbing, invisible to a system-level record ranked 2,083th of 12,903 by violation count. The guide to what this data misses covers that gap.