Is EL OSO WSC's water safe to drink?
EL OSO WSC had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. It serves 6,288 people through 2,096 service connections.
How this compares nationally
21 total violations and 16 health-based ones put EL OSO WSC at the 91th percentile nationally for violation burden, rank 1,180 of 12,903.
Against the TX average
EL OSO WSC's 16 health-based violations sit above the TX average of 6.7, across 1,633 systems statewide. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
EL OSO WSC's most recent violation on record is dated 2025-02-07, with the most recent health-based one dated 2024-01-01. Last reported to EPA: 06/26/2026.
The concern categories on record
EL OSO WSC'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: Arsenic
- Disinfection byproducts - flagged from: TTHM
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 EL OSO WSC's record does not cover
EL OSO WSC'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. This record - 16 health-based violations on file for EL OSO WSC - 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.