SONTERRA MUD: EPA violation history, explained
SONTERRA MUD has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 16,614 people get their water from it, across 9,221 connections.
How this compares nationally
Out of 12,903 systems in this dataset, SONTERRA MUD ranks 6,526th by violation burden (49th percentile) - 10 violations total, 2 health-baseds.
Against the TX average
Among the 1,633 TX systems in this dataset, the average is 6.7 health-based violations - SONTERRA MUD's 2 is at or below that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
SONTERRA MUD's most recent violation on record is dated 2026-06-12, with the most recent health-based one dated 2017-01-04. Last reported to EPA: 06/26/2026.
The concern categories on record
SONTERRA MUD'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:
- Other regulated metals - flagged from: Fluoride
The most severe category on record is other regulated metals, which points toward a reverse osmosis-class filter if you want to address it directly.
What SONTERRA MUD's record does not cover
SONTERRA MUD'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. Between the utility's meter and SONTERRA MUD's customers' taps is household plumbing, invisible to a system-level record ranked 6,526th of 12,903 by violation count. The guide to what this data misses covers that gap.