The Oaks Water Supply Corporation
EPA ID: TX0150399 · 1,191 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for The Oaks Water Supply Corporation (TX0150399): 1 EPA violation in the last five years. The Oaks Water Supply Corporation carries 1 resolved violation in the five-year EPA record - each has been formally closed, and the supplier, which serves approximately 1,191 people, now meets all applicable federal drinking water standards with no open enforcement activity remaining.
Data: EPA SDWIS
Service Area Map
Coverage area for The Oaks Water Supply Corporation Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The The Oaks Water Supply Corporation serves a community with a median household income of $151,673 and an estimated 18,107 residents across its service area.
Environmental Justice Note: 46% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. 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?
The Oaks Water Supply Corporation'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.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Detected Contaminants
How The Oaks Water Supply Corporation compares to EPA limits
What This Means For You
Surface Water Treatment Rule at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 3 detections 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
The Oaks Water Supply Corporation (EPA ID: TX0150399) is a community water system in Texas that serves approximately 1,191 people from surface water sources.
This system serves ZIP code 78255 in San Antonio.
Violation History
Status breakdown for accepted records with record years 2021-2026: 1 resolved, 0 archived, 0 addressed, and 0 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 |
|---|---|---|---|
| July 1, 2025 | Surface Water Treatment Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
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.
- 78255 - San Antonio
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for The Oaks Water Supply Corporation (TX0150399) on EPA.gov.
Frequently Asked Questions
Is The Oaks Water Supply Corporation water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for The Oaks Water Supply Corporation; its 1 accepted 2021-2026 record are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does The Oaks Water Supply Corporation serve?
The Oaks Water Supply Corporation serves approximately 1,191 people across 1 ZIP code in Texas.
Where does The Oaks Water Supply Corporation get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). The Oaks Water Supply Corporation (TX): 1 EPA Violation. https://zipcheckup.com/water-system/tx0150399/
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author = {{ZipCheckup}},
title = {{The Oaks Water Supply Corporation (TX): 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/tx0150399/}
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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
The Oaks Water Supply Corporation (EPA ID: TX0150399) - request the latest Consumer Confidence Report or ask about specific contaminants.