Community Water System · PWS TX1090030
Post Oak Sud
Operator location Hubbard, Texas - 41% of 109 violations are health-based (upper-third health share (> 23%)); surface water source; 3,117 served per SDWIS.
- 3,117
- People served (this PWS)
- 109
- EPA violations (this PWS)
- 45
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Post Oak Sud standing, high SDWIS violation third
41% of 109 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 41% is upper-third health share (> 23%). Population rank #10,339 of 29,740 among systems serving 500+.
The verdict
Post Oak Sud sits in the upper third of the sitemap cohort by violation count (109), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 3,117 (mid served population (≤ 3,309)). Health-based share is 41% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #10,339 of 29,740
- Population · /systems
- #1,236 of 3,040
- Population · TX
- 109
- Total EPA violations on record
- 41%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,039
- County
- Hill
- School/Daycare
- No
- MCL Violations
- 42
- Monitoring Violations
- 37
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 29 | 2008 |
| Chlorine | MR | 17 | 2021 |
| Consumer Confidence Rule | Other | 11 | 2024 |
| Coliform (TCR) | MCL | 8 | 2006 |
| Revised Total Coliform Rule | MON | 8 | 2023 |
| Coliform (TCR) | MR | 7 | 2003 |
| Public Notice | Other | 7 | 2025 |
| Lead and Copper Rule | MR | 5 | 2024 |
| Total Haloacetic Acids (HAA5) | MCL | 5 | 2007 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
| Surface Water Treatment Rule | TT | 1 | 1993 |
Violation Count vs. the National Corpus
Post Oak Sud has 109 recorded EPA violations, 75% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 25% carry more. 41% of this system's own violations are health-based (45 of 109), and it ranks #10,339 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
109 Around the middle fewer violations than 25% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Post Oak Sud
45 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for TX1090030.
Sources: EPA SDWIS · Texas Commission on Environmental Quality (TCEQ) - Drinking Water Watch
Nationwide peers
109 violations · 3,117 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Post Oak Sud
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Texas compares on the same EPA violation measures. Texas systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.