Cornerstones Municipal Utility District
EPA ID: TX1011692 · 5,331 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Cornerstones Municipal Utility District (TX1011692): no EPA violations recorded in the last five years. EPA data: Cornerstones Municipal Utility District - zero violations, five years, 5,331 served.
Data: EPA SDWIS
Service Area Map
Coverage area for Cornerstones Municipal Utility District Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Cornerstones Municipal Utility District serves a community with a median household income of $105,607 and an estimated 73,226 residents across its service area.
💧 Where Does Your Water Come From?
Cornerstones Municipal Utility District's water is pumped from underground aquifers. 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.
Wastewater Proximity Note: This service area ranks in the 70th percentile nationally for proximity to wastewater discharge points.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 7 detections recorded. 1 exceeds federal EPA limits (4 ppt for PFOA/PFOS).
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
Cornerstones Municipal Utility District (EPA ID: TX1011692) is a community water system in Texas that serves approximately 5,331 people from groundwater sources.
This system serves ZIP code 77450 in Katy.
Violation History
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.
- 77450 - Katy
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Cornerstones Municipal Utility District (TX1011692) on EPA.gov.
Frequently Asked Questions
Is Cornerstones Municipal Utility District water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Cornerstones Municipal Utility District 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 Cornerstones Municipal Utility District serve?
Cornerstones Municipal Utility District serves approximately 5,331 people across 1 ZIP code in Texas.
Where does Cornerstones Municipal Utility District get its water?
The primary water source is groundwater.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Cornerstones Municipal Utility District Water Report, TX. https://zipcheckup.com/water-system/tx1011692/
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