Tonkawa Water Supply Corporation
EPA ID: TX2270112 · 90 people served · 1 ZIP code
Across every monitored period in the past five years, Tonkawa Water Supply Corporation reported no EPA violations for its service population of 90.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Tonkawa Water Supply Corporation Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Tonkawa Water Supply Corporation serves a community with a median household income of $126,422 and an estimated 11,980 residents across its service area.
💧 Where Does Your Water Come From?
Tonkawa Water Supply Corporation'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 1% of homes in Travis 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
Tonkawa Water Supply Corporation (EPA ID: TX2270112) is a community water system in Texas that serves approximately 90 people from groundwater sources.
This system serves ZIP code 78669 in Spicewood.
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
- 78669 — Spicewood
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Tonkawa Water Supply Corporation (TX2270112) on EPA.gov.
Frequently Asked Questions
Is Tonkawa Water Supply Corporation water safe to drink?
Based on EPA records, Tonkawa Water Supply Corporation has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Tonkawa Water Supply Corporation serve?
Tonkawa Water Supply Corporation serves approximately 90 people across 1 ZIP code in Texas.
Where does Tonkawa Water Supply Corporation 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.