Rockwall Ranch Subdivision
EPA ID: TX0460250 · 1,773 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Rockwall Ranch Subdivision (TX0460250): no drinking-water violations recorded since 2021. With no violations in its EPA file, Rockwall Ranch Subdivision serves 1,773 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Rockwall Ranch Subdivision Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Rockwall Ranch Subdivision have a median household income of $132,470 and about 7,274 residents live in those ZIP codes (Census; not the number of people this system supplies).
💧 Where Does Your Water Come From?
Rockwall Ranch Subdivision's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
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. 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
Rockwall Ranch Subdivision (EPA ID: TX0460250) is a community water system in Texas that serves approximately 1,773 people from groundwater sources.
This system serves ZIP code 78266 in San Antonio.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.001 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: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
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.
- 78266 - San Antonio
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Rockwall Ranch Subdivision (TX0460250) on EPA.gov.
Frequently Asked Questions
Is Rockwall Ranch Subdivision water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Rockwall Ranch Subdivision in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Rockwall Ranch Subdivision serve?
Rockwall Ranch Subdivision serves approximately 1,773 people across 1 ZIP code in Texas.
Where does Rockwall Ranch Subdivision get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Rockwall Ranch Subdivision Water Quality Report, TX. https://zipcheckup.com/water-system/tx0460250/
@misc{zipcheckup-water-system-tx0460250,
author = {{ZipCheckup}},
title = {{Rockwall Ranch Subdivision Water Quality Report, TX}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/tx0460250/}
}