D21/100
POTOSI WSC — Water Quality Report 2026
Serving 7,413 people · Texas
Water Source
Purchased Surface Water
County
—
System ID
TX2210008
Violations
23
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.020 µg/L | 0.004 µg/L | Over Limit |
PFHxS | 0.016 µg/L | 0.010 µg/L | Over Limit |
PFOA | 0.006 µg/L | 0.004 µg/L | Over Limit |
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – June 11, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: January 7, 2023 – June 26, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2021 – September 30, 2021Rule: Stage 1 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 POTOSI WSC
Is POTOSI WSC water safe to drink?
POTOSI WSC water receives a grade of D (21/100), which is considered poor. 3 contaminant(s) exceed EPA legal limits and 23 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has POTOSI WSC detected?
34 contaminants were tested in POTOSI WSC's water. Notable contaminants include PFOS, PFHxS, PFOA. 3 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does POTOSI WSC have any EPA violations?
Yes, POTOSI WSC has 23 EPA violation(s) on record, with the most recent in 2023. Violation types include Other, MR, MCL. 8 are health-based violations.
How many people does POTOSI WSC serve?
POTOSI WSC serves approximately 7,413 people, Texas.
What type of water does POTOSI WSC provide?
POTOSI WSC sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is TX2210008.
How does POTOSI WSC compare to other utilities in Texas?
POTOSI WSC scores 21/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Texas state page for a full comparison of water systems.