When: January 7, 2023 – May 28, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: May 1, 2022 – May 31, 2022Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2021 – January 5, 2022Rule: 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 POST OAK SUD
Is POST OAK SUD water safe to drink?
POST OAK SUD water receives a grade of F (13/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 35 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has POST OAK SUD detected?
1 contaminants were tested in POST OAK SUD's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does POST OAK SUD have any EPA violations?
Yes, POST OAK SUD has 35 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, RPT. 13 are health-based violations.
How many people does POST OAK SUD serve?
POST OAK SUD serves approximately 3,117 people, Texas.
What type of water does POST OAK SUD provide?
POST OAK SUD 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 TX1090030.
How does POST OAK SUD compare to other utilities in Texas?
POST OAK SUD scores 13/100 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.