What's in WILMINGTON's water?
WILMINGTON has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 5,700 people get their water from it, across 2,471 connections.
How this compares nationally
WILMINGTON has 106 violations on record in total, 8 of thems health-based - ranking it 2,307th of 12,903 systems by violation count, the 82th percentile nationally.
Against the IL average
WILMINGTON's 8 health-based violations sit above the IL average of 5.0, across 560 systems statewide. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
WILMINGTON's most recent violation on record is dated 2025-02-07, with the most recent health-based one dated 1997-01-07. Last reported to EPA: 05/27/2026.
The concern categories on record
WILMINGTON'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)
- Radionuclides - flagged from: Combined Radium (-226 and -228); Gross Alpha, Excl. Radon and U
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What WILMINGTON's record does not cover
This is what WILMINGTON 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's customers' taps is household plumbing, invisible to a system-level record ranked 2,307th of 12,903 by violation count. The guide to what this data misses covers that gap.