Medina Valley Water Supply Company
EPA ID: TX1630036 · 255 people served · 1 ZIP code
Across every monitored period in the past five years, Medina Valley Water Supply Company reported no EPA violations for its service population of 255.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Medina Valley Water Supply Company Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Medina Valley Water Supply Company serves a community with a median household income of $102,724 and an estimated 9,494 residents across its service area.
💧 Where Does Your Water Come From?
Medina Valley Water Supply Company'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.
About 2% of homes in Medina County, Texas rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
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
Medina Valley Water Supply Company (EPA ID: TX1630036) is a community water system in Texas that serves approximately 255 people from groundwater sources.
This system serves ZIP code 78009 in Castroville.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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
- 78009 — Castroville
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Medina Valley Water Supply Company (TX1630036) on EPA.gov.
Frequently Asked Questions
Is Medina Valley Water Supply Company water safe to drink?
Based on EPA records, Medina Valley Water Supply Company has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Medina Valley Water Supply Company serve?
Medina Valley Water Supply Company serves approximately 255 people across 1 ZIP code in Texas.
Where does Medina Valley Water Supply Company get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.