F14/100
EL OSO WSC — Water Quality Report 2026
Serving 6,288 people · Texas
Water Source
Groundwater
County
—
System ID
TX1280007
Violations
19
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
2
Health-Related
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2024 – March 31, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2023 – September 30, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About EL OSO WSC
Is EL OSO WSC water safe to drink?
EL OSO WSC water receives a grade of F (14/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 19 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has EL OSO WSC detected?
31 contaminants were tested in EL OSO WSC's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does EL OSO WSC have any EPA violations?
Yes, EL OSO WSC has 19 EPA violation(s) on record, with the most recent in 2024. Violation types include MCL, MR, Other. 16 are health-based violations.
How many people does EL OSO WSC serve?
EL OSO WSC serves approximately 6,288 people, Texas.
What type of water does EL OSO WSC provide?
EL OSO WSC sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is TX1280007.
How does EL OSO WSC compare to other utilities in Texas?
EL OSO WSC scores 14/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Texas state page for a full comparison of water systems.