Granite Oaks Water Users Association
EPA ID: AZ0413155 · 1,200 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Granite Oaks Water Users Association (AZ0413155): 2 unresolved EPA violations on record. EPA compliance records for Granite Oaks Water Users Association show 2 unresolved violations - findings that remain open and are tracked at the federal level, covering a service territory of approximately 1,200 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Granite Oaks Water Users Association Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Granite Oaks Water Users Association serves a community with a median household income of $70,809 and an estimated 38,727 residents across its service area.
Environmental Justice Note: 38% 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?
Granite Oaks Water Users Association'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 60th percentile nationally for proximity to wastewater discharge points.
Infrastructure Risk
Detected Contaminants
How Granite Oaks Water Users Association compares to EPA limits
What This Means For You
Revised Total Coliform Rule at 3 presence exceeds the EPA maximum of presence.
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Stage 2 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper Rule at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 14 detections recorded. 4 exceed federal EPA limits (4 ppt for PFOA/PFOS). 2 exceed state limits.
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
Granite Oaks Water Users Association (EPA ID: AZ0413155) is a community water system in Arizona that serves approximately 1,200 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 4 resolved, 0 archived, 0 addressed, and 2 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| November 26, 2025 | Lead and Copper Rule | Non-health-based | Unaddressed (current) |
| July 2, 2025 | Stage 2 DBP Rule | Non-health-based | Resolved |
| May 1, 2025 | Revised Total Coliform Rule | Non-health-based | Resolved |
| October 1, 2024 | Stage 1 DBP Rule | Non-health-based | Unaddressed (current) |
| April 1, 2022 | Revised Total Coliform Rule | Non-health-based | Resolved |
| January 1, 2022 | Revised Total Coliform Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Revised Total Coliform Rule | Microbiological | 3 | No |
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
| Stage 2 DBP Rule | Treatment Failure | 1 | No |
| Lead and Copper Rule | Treatment Failure | 1 | No |
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 AZ or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Granite Oaks Water Users Association (AZ0413155) on EPA.gov.
Frequently Asked Questions
Is Granite Oaks Water Users Association water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 2 current noncompliance records and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does Granite Oaks Water Users Association serve?
Granite Oaks Water Users Association serves approximately 1,200 people across 2 ZIP codes in Arizona.
Where does Granite Oaks Water Users Association get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Granite Oaks Water Users Association (AZ): 6 EPA Violations. https://zipcheckup.com/water-system/az0413155/
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author = {{ZipCheckup}},
title = {{Granite Oaks Water Users Association (AZ): 6 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/az0413155/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Granite Oaks Water Users Association (EPA ID: AZ0413155) - request the latest Consumer Confidence Report or ask about specific contaminants.