Holbrook Sda Indian School
EPA ID: AZ0409046 · 100 people served · 1 ZIP code
EPA data: Holbrook Sda Indian School — zero violations, five years, 100 served.
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 1 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Holbrook Sda Indian School Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Holbrook Sda Indian School serves a community with a median household income of $64,167 and an estimated 5,189 residents across its service area. Approximately 69% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 84% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Holbrook Sda Indian School'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 11% of homes in Navajo County, Arizona 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 Arizona
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
Holbrook Sda Indian School (EPA ID: AZ0409046) is a community water system in Arizona that serves approximately 100 people from groundwater sources.
This system serves ZIP code 86025 in Holbrook.
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
- 86025 — Holbrook
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Holbrook Sda Indian School (AZ0409046) on EPA.gov.
Frequently Asked Questions
Is Holbrook Sda Indian School water safe to drink?
Based on EPA records, Holbrook Sda Indian School has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Holbrook Sda Indian School serve?
Holbrook Sda Indian School serves approximately 100 people across 1 ZIP code in Arizona.
Where does Holbrook Sda Indian School 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.