B64/100

EPCOR - SAN TAN ANTHEM — Water Quality Report 2026

Serving 10,362 people · Arizona

Water Source
Groundwater
County
System ID
AZ0411136
Violations
28

Contaminant Test Results

1 contaminant above EPA health goals
ContaminantDetectedLimit (MCL)Status
PFOA
0.019 µg/L0.004 µg/LOver Limit

EPA Violation History

5

Violations (last 5yr)

0

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: October 1, 2024 – October 31, 2024Rule: 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: April 1, 2024 – April 30, 2024Rule: Stage 1 DBPREnforcement: 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: January 1, 2023 – December 31, 2023Enforcement: 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: April 1, 2022 – June 30, 2022Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved

Disinfection byproduct treatment technique failure

When: March 2, 2022 – June 20, 2022Rule: Ground Water RuleEnforcement: 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 - SAN TAN ANTHEM

Is EPCOR - SAN TAN ANTHEM water safe to drink?

EPCOR - SAN TAN ANTHEM water receives a grade of B (64/100), which is considered good. Out of 31 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.

What contaminants has EPCOR - SAN TAN ANTHEM detected?

31 contaminants were tested in EPCOR - SAN TAN ANTHEM's water. Notable contaminants include PFOA. 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).

Does EPCOR - SAN TAN ANTHEM have any EPA violations?

Yes, EPCOR - SAN TAN ANTHEM has 28 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, Other, MON.

How many people does EPCOR - SAN TAN ANTHEM serve?

EPCOR - SAN TAN ANTHEM serves approximately 10,362 people, Arizona. The system provides water to 1 community: Johnson Ranch.

What type of water does EPCOR - SAN TAN ANTHEM provide?

EPCOR - SAN TAN ANTHEM sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is AZ0411136.

How does EPCOR - SAN TAN ANTHEM compare to other utilities in Arizona?

EPCOR - SAN TAN ANTHEM scores 64/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Arizona state page for a full comparison of water systems.

Cities Served