TapSafetyReport
F0/100

GRANITE OAKS WATER USERS ASSOCIATION — Water Quality Report 2026

Serving 1,200 people · Arizona

Water Source
Groundwater
County
—
System ID
AZ0413155
Violations
103

Contaminant Test Results

EPA Violation History

4

Violations (last 5yr)

1

Unresolved

0

Health-Related

TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: May 1, 2025 – May 31, 2025Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Unresolved

Failed to issue ongoing public notification

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: October 1, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 1, 2022 – June 30, 2022Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Failed Level 2 Assessment under Revised Total Coliform Rule

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2022 – March 31, 2022Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway

Understanding violation severity

Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.

Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly

Frequently Asked Questions About GRANITE OAKS WATER USERS ASSOCIATION

Is GRANITE OAKS WATER USERS ASSOCIATION water safe to drink?

GRANITE OAKS WATER USERS ASSOCIATION water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 103 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has GRANITE OAKS WATER USERS ASSOCIATION detected?

1 contaminants were tested in GRANITE OAKS WATER USERS ASSOCIATION's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.

Does GRANITE OAKS WATER USERS ASSOCIATION have any EPA violations?

Yes, GRANITE OAKS WATER USERS ASSOCIATION has 103 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, Other, MON.

How many people does GRANITE OAKS WATER USERS ASSOCIATION serve?

GRANITE OAKS WATER USERS ASSOCIATION serves approximately 1,200 people, Arizona. The system provides water to 1 community: Prescott.

What type of water does GRANITE OAKS WATER USERS ASSOCIATION provide?

GRANITE OAKS WATER USERS ASSOCIATION sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is AZ0413155.

How does GRANITE OAKS WATER USERS ASSOCIATION compare to other utilities in Arizona?

GRANITE OAKS WATER USERS ASSOCIATION scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Arizona state page for a full comparison of water systems.

Cities Served

Prescott