TapSafetyReport
F0/100

DUNCAN PUBLIC UTILITIES AUTHORITY — Water Quality Report 2026

Serving 23,000 people · Oklahoma

Water Source
Surface Water
County
—
System ID
OK1010809
Violations
165

Contaminant Test Results

EPA Violation History

9

Violations (last 5yr)

5

Unresolved

5

Health-Related

TIER 3Resolved

Monitoring Violation

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

When: November 1, 2024 – November 30, 2024Rule: Total Coliform RuleEnforcement: 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: November 1, 2024 – November 30, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 2Unresolved

Treatment Technique Violation

When: October 1, 2024 – December 31, 2024Rule: Stage 1 DBPREnforcement: Formal — state order issuedVerify 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: August 1, 2024 – August 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: August 1, 2024 – August 31, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 2Unresolved

Treatment Technique Violation

When: July 1, 2024 – September 30, 2024Rule: Stage 1 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Treatment Technique Violation

When: April 1, 2024 – June 30, 2024Rule: Stage 1 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Treatment Technique Violation

When: January 1, 2024 – March 31, 2024Rule: Stage 1 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: January 1, 2023 – March 31, 2023Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov

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 DUNCAN PUBLIC UTILITIES AUTHORITY

Is DUNCAN PUBLIC UTILITIES AUTHORITY water safe to drink?

DUNCAN PUBLIC UTILITIES AUTHORITY water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 165 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has DUNCAN PUBLIC UTILITIES AUTHORITY detected?

69 contaminants were tested in DUNCAN PUBLIC UTILITIES AUTHORITY's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.

Does DUNCAN PUBLIC UTILITIES AUTHORITY have any EPA violations?

Yes, DUNCAN PUBLIC UTILITIES AUTHORITY has 165 EPA violation(s) on record, with the most recent in 2024. Violation types include MON, MR, TT. 150 are health-based violations.

How many people does DUNCAN PUBLIC UTILITIES AUTHORITY serve?

DUNCAN PUBLIC UTILITIES AUTHORITY serves approximately 23,000 people, Oklahoma.

What type of water does DUNCAN PUBLIC UTILITIES AUTHORITY provide?

DUNCAN PUBLIC UTILITIES AUTHORITY sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is OK1010809.

How does DUNCAN PUBLIC UTILITIES AUTHORITY compare to other utilities in Oklahoma?

DUNCAN PUBLIC UTILITIES AUTHORITY scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Oklahoma state page for a full comparison of water systems.