WILMINGTON WATER DEPT: EPA violation history, explained
WILMINGTON WATER DEPT had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. 21,654 people get their water from it, across 7,789 connections.
WILMINGTON WATER DEPT's record against the rest of the country
31 total violations and 5 health-based ones put WILMINGTON WATER DEPT at the 73th percentile nationally for violation burden, rank 3,504 of 12,903.
How WILMINGTON WATER DEPT compares within MA
WILMINGTON WATER DEPT's 5 health-based violations sit within the MA average of 7.0, across 283 systems statewide. 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 WILMINGTON WATER DEPT is from 2022-01-09 (health-based: 2022-01-09). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
WILMINGTON WATER DEPT'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:
- Lead & copper - flagged from: Lead and Copper Rule
- Microbial contamination / treatment technique - flagged from: Coliform (TCR); Revised Total Coliform Rule
- Nitrate / nitrite - flagged from: Nitrite
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
This is what WILMINGTON WATER DEPT 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 WILMINGTON WATER DEPT's customers' taps is household plumbing, invisible to a system-level record ranked 3,504th of 12,903 by violation count. The guide to what this data misses covers that gap.