Post Oak Special Utility District
EPA ID: TX1090030 · 3,117 people served · 7 ZIP codes
ZipCheckup's reading of EPA records for Post Oak Special Utility District (TX1090030): 4 violations recorded with unresolved status in the SDWIS data used. Post Oak Special Utility District has 4 EPA violations listed as open in the reviewed federal record - approximately 3,117 people fall within its service area.
Data: EPA SDWIS
Service Area Map
Coverage area for Post Oak Special Utility District Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Post Oak Special Utility District have a median household income of $56,354 and about 9,478 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 55% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 71% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
🌊 Where Does Your Water Come From?
Post Oak Special Utility District's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 1 detection recorded.
Comparable Water Systems
Similar-sized systems in Texas
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Post Oak Special Utility District (EPA ID: TX1090030) is a community water system in Texas that serves approximately 3,117 people from surface water sources.
This system provides water to 7 ZIP codes across 7 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 9 resolved, 0 archived, 0 addressed, and 4 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| April 2, 2026 | Public Notice | Non-health-based | Unaddressed (current) |
| May 1, 2025 | Public Notice | Non-health-based | Unaddressed (current) |
| December 30, 2024 | Lead and Copper Rule | Non-health-based | Resolved |
| November 1, 2024 | Public Notice | Non-health-based | Resolved |
| October 17, 2024 | LEAD AND COPPER RULE REVISIONS | Health-based | Unaddressed (current) |
| October 17, 2024 | LEAD AND COPPER RULE REVISIONS | Non-health-based | Unaddressed (current) |
| July 1, 2024 | Consumer Confidence Rule | Non-health-based | Resolved |
| July 1, 2024 | Consumer Confidence Rule | Non-health-based | Resolved |
| October 1, 2023 | Revised Total Coliform Rule | Non-health-based | Resolved |
| January 7, 2023 | Public Notice | Non-health-based | Resolved |
| May 1, 2022 | Revised Total Coliform Rule | Non-health-based | Resolved |
| December 30, 2021 | Lead and Copper Rule | Non-health-based | Resolved |
| July 1, 2021 | Chlorine | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Public Notice | Other (notice or report rule) | 4 | No |
| Public Notice | Monitoring & Reporting | 2 | No |
| LEAD AND COPPER RULE REVISIONS | Treatment Technique, Monitoring & Reporting | 2 | Yes |
| Consumer Confidence Rule | Other (notice or report rule) | 2 | No |
| Chlorine | Monitoring & Reporting | 2 | No |
| Chlorine | Monitoring & Reporting | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| Below the reporting limit | No | 2024-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
7 of 7 ZIP records with known zones are in EPA Radon Zone 3.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by TX or modeled from parcel and building-footprint data.
- 76635 - Coolidge
- 76639 - Dawson
- 76648 - Hubbard
- 76660 - Malone
- 76673 - Mount Calm
- 76676 - Penelope
- 76679 - Purdon
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Post Oak Special Utility District (TX1090030) on EPA.gov.
Frequently Asked Questions
Is Post Oak Special Utility District water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current health-based noncompliance record for Post Oak Special Utility District. Review the utility's current notices and EPA record. This system-level compliance history cannot determine conditions at a specific tap.
How many people does Post Oak Special Utility District serve?
Post Oak Special Utility District serves approximately 3,117 people across 7 ZIP codes in Texas.
Where does Post Oak Special Utility District get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Post Oak Special Utility District (TX): 1 Health Violation. https://zipcheckup.com/water-system/tx1090030/
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author = {{ZipCheckup}},
title = {{Post Oak Special Utility District (TX): 1 Health Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/tx1090030/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Post Oak Special Utility District (EPA ID: TX1090030) - request the latest Consumer Confidence Report or ask about specific contaminants.