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East Duke, OK Tap Water Quality 2026

Water quality report for East Duke, OK — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at East Duke's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Duke Public Water Authority PWSID: OK3003311 Updated: 2026 Q2
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1 violation currently open

Lead was not detected. PFAS has never been sampled at this system.

D

East Duke earns a D for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: not detected
PFAS never sampled at this system
25 violations since 2015, 18 health-based
1 violation currently open
East Duke's lead level vs. all Oklahoma community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of Oklahoma utilities
Population Served
392
~392 connections
Water Source
Surface water
Purchased from another system — SDWIS source code SWP
Active Violations
1
1 open of 25 since 2015

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.117 MG/L 0.080 mg/L 2025 Archived
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Unaddressed
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Unaddressed
TTHM MCL EXCEEDANCE 0.145 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.146 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.125 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.087 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.095 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.107 MG/L 0.080 mg/L 2022 Archived
TTHM MCL EXCEEDANCE 0.099 MG/L 0.080 mg/L 2022 Archived
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2020 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Resolved
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2019 Resolved
TTHM MCL EXCEEDANCE 0.1 MG/L 0.080 mg/L 2019 Resolved
TTHM MCL EXCEEDANCE 0.092 MG/L 0.080 mg/L 2018 Resolved
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2018 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2018 Resolved
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2018 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2017 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2016 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2016 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2016 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

1 violation remains open, out of 25 recorded since 2015 (18 health-based).

About the Main Water System

Utility Duke Public Water Authority
PWSID OK3003311
Water source Surface water — Purchased from another system — SDWIS source code SWP
Population served 392
Service connections 392
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is East Duke tap water safe to drink? ▼
No federal limit is exceeded on record. 1 violation(s) remain open.
Does East Duke water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to East Duke? ▼
Duke Public Water Authority (PWSID OK3003311), one of 2 systems serving this area. Surface water. Purchased from another system — SDWIS source code SWP
When was this system last inspected? ▼
It was last inspected on 2025-12-03. Inspectors recorded 2 significant deficiencies.

What Should East Duke Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Follow the open violation
This system has an unresolved violation. Contact the supplier for its corrective-action schedule.

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