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D22/100

EPCOR - LAKE HAVASU — Water Quality Report 2026

Serving 4,788 people · Arizona

Water Source
Groundwater
County
—
System ID
AZ0408015
Violations
78

Contaminant Test Results

EPA Violation History

8

Violations (last 5yr)

2

Unresolved

0

Health-Related

TIER 3Unresolved

Disinfection byproduct treatment technique failure

When: July 30, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved

Disinfection byproduct treatment technique failure

When: July 2, 2025Rule: 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: June 1, 2024 – June 30, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Monitoring Violation

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

When: June 1, 2024 – June 30, 2024Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Exceeded the MCL for disinfection byproducts

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

When: July 1, 2023 – September 30, 2023Enforcement: Resolving — corrective action underway
TIER 3Resolved

Exceeded the MCL for disinfection byproducts

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

When: July 1, 2022 – September 30, 2022Enforcement: 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: August 1, 2021 – July 31, 2022Rule: Stage 2 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: August 1, 2021 – July 31, 2022Rule: Stage 2 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 EPCOR - LAKE HAVASU

Is EPCOR - LAKE HAVASU water safe to drink?

EPCOR - LAKE HAVASU water receives a grade of D (22/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 78 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has EPCOR - LAKE HAVASU detected?

31 contaminants were tested in EPCOR - LAKE HAVASU's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.

Does EPCOR - LAKE HAVASU have any EPA violations?

Yes, EPCOR - LAKE HAVASU has 78 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MON.

How many people does EPCOR - LAKE HAVASU serve?

EPCOR - LAKE HAVASU serves approximately 4,788 people, Arizona. The system provides water to 1 community: Lake Havasu City.

What type of water does EPCOR - LAKE HAVASU provide?

EPCOR - LAKE HAVASU sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is AZ0408015.

How does EPCOR - LAKE HAVASU compare to other utilities in Arizona?

EPCOR - LAKE HAVASU scores 22/100 with a grade of D (poor). 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

Lake Havasu City