TapSafetyReport
D34/100

WATCO WATER — Water Quality Report 2026

Serving 1,153 people · Arizona

Water Source
Groundwater
County
—
System ID
AZ0409049
Violations
54

Contaminant Test Results

EPA Violation History

8

Violations (last 5yr)

4

Unresolved

1

Health-Related

TIER 3Unresolved

Monitoring Violation

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

When: September 1, 2025 – September 30, 2025Rule: Total Coliform RuleVerify on EPA.gov
TIER 3Unresolved

Surface water treatment technique failure

When: July 1, 2025Verify on EPA.gov
TIER 3Unresolved

Monitoring / Reporting Violation

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

When: January 1, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved

Disinfection byproduct treatment technique failure

When: October 2, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved

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, 2023 – January 22, 2025Rule: Ground Water RuleEnforcement: 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, 2023 – June 30, 2023Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved

Treatment technique violation

When: November 6, 2022 – January 17, 2023Rule: Total Coliform RuleEnforcement: 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: September 1, 2022 – November 14, 2022Rule: Total Coliform 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 WATCO WATER

Is WATCO WATER water safe to drink?

WATCO WATER water receives a grade of D (34/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 54 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has WATCO WATER detected?

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

Does WATCO WATER have any EPA violations?

Yes, WATCO WATER has 54 EPA violation(s) on record, with the most recent in 2025. Violation types include MON, Other, MR. 3 are health-based violations.

How many people does WATCO WATER serve?

WATCO WATER serves approximately 1,153 people, Arizona. The system provides water to 1 community: Bourden Ranch Estates.

What type of water does WATCO WATER provide?

WATCO WATER sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is AZ0409049.

How does WATCO WATER compare to other utilities in Arizona?

WATCO WATER scores 34/100 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

Bourden Ranch Estates