CITY OF WILLIS: EPA violation history, explained
CITY OF WILLIS had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. 14,133 people get their water from it, across 4,711 connections.
Ranked against every other system in this dataset
39 total violations and 3 health-based ones put CITY OF WILLIS at the 62th percentile nationally for violation burden, rank 4,842 of 12,903.
How CITY OF WILLIS compares within TX
TX's 1,633 covered systems average 6.7 health-based violations each; CITY OF WILLIS carries 3, not more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for CITY OF WILLIS is from 2026-10-02 (health-based: 2026-10-02). Last reported to EPA: 06/26/2026.
What kind of problem, specifically
CITY OF WILLIS'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); Revised Total Coliform 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 this data is and is not
This is what CITY OF WILLIS 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. This record - 3 health-based violations on file for CITY OF WILLIS - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.