Mcmullen County Calliham
EPA ID: TX1560001 · 300 people served · 1 ZIP code
Five years of EPA monitoring have produced no violations for Mcmullen County Calliham — the supplier serving 300 residents has kept every contaminant level within federal limits, a result that places it among the top-performing utilities for systems with a service population of comparable size.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 1 (2021) to 2 (2024). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Mcmullen County Calliham Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Mcmullen County Calliham serves a community with a median household income of $45,417 and an estimated 277 residents across its service area. Approximately 53% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Mcmullen County Calliham'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 3% of homes in McMullen County, Texas rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Wastewater Proximity Note: This service area ranks in the 60th percentile nationally for proximity to wastewater discharge points.
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
Mcmullen County Calliham (EPA ID: TX1560001) is a community water system in Texas that serves approximately 300 people from groundwater sources.
This system serves ZIP code 78072 in Tilden.
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
- 78072 — Tilden
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Mcmullen County Calliham (TX1560001) on EPA.gov.
Frequently Asked Questions
Is Mcmullen County Calliham water safe to drink?
Based on EPA records, Mcmullen County Calliham has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Mcmullen County Calliham serve?
Mcmullen County Calliham serves approximately 300 people across 1 ZIP code in Texas.
Where does Mcmullen County Calliham get its water?
The primary water source is groundwater.