Lenapah, OK Tap Water Quality 2026

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

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

Main Utility: Lenapah Public Works Authority PWSID: OK1021501 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead is 2.10 ppb, 14% of the action level and no violations are open. PFAS has never been sampled at this system.

Lenapah earns a B for water quality

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

Lead: 2.10 ppb — 14% of the federal action level

PFAS never sampled at this system

29 violations since 2015, 18 health-based

No violations currently open

Lenapah's lead level vs. all Oklahoma community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 2.10 ppb — 14% of the federal action level

✓ Lower lead than 47% of Oklahoma utilities

Population Served

223

~145 connections

Water Source

Surface water

Drawn from surface water — SDWIS source code SW

Active Violations

29 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

14% of EPA action level

2.10 ppb

Action level: 15 ppb

The 90th-percentile lead result is 2.10 ppb, 14% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

Contaminant	Type	Measured	Limit	Period	Status
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	0.085 MG/L	0.080 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	0.085 MG/L	0.080 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	0.088 MG/L	0.080 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	0.089 MG/L	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	0.084 MG/L	0.080 mg/L	2020	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2020	Resolved
TTHM	MCL EXCEEDANCE	0.086 MG/L	0.080 mg/L	2020	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2019	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2019	Resolved
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2019	Resolved
Interim Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2019	Resolved
Interim Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2019	Resolved
TTHM	MCL EXCEEDANCE	0.081 MG/L	0.080 mg/L	2019	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2018	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2018	Resolved
TTHM	MCL EXCEEDANCE	0.087 MG/L	0.080 mg/L	2018	Resolved
Interim Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2018	Resolved
TTHM	MCL EXCEEDANCE	0.094 MG/L	0.080 mg/L	2018	Resolved
TTHM	MCL EXCEEDANCE	0.094 MG/L	0.080 mg/L	2018	Resolved
TTHM	MCL EXCEEDANCE	0.084 MG/L	0.080 mg/L	2018	Resolved
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2017	Resolved
Consumer Confidence Rule	OTHER	—	—	2017	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2015	Resolved
TTHM	MCL EXCEEDANCE	0.084 MG/L	0.080 mg/L	2015	Resolved
Consumer Confidence Rule	OTHER	—	—	2015	Resolved
TTHM	MCL EXCEEDANCE	0.087 MG/L	0.080 mg/L	2015	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2015	Resolved
TTHM	MCL EXCEEDANCE	0.092 MG/L	0.080 mg/L	2015	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

29 violations are on record since 2015, of which 18 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Lenapah Public Works Authority

PWSID OK1021501

Water source Surface water — Drawn from surface water — SDWIS source code SW

Population served 223

Service connections 145

Systems serving this area 2

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Lenapah tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open. Lead is 2.10 ppb, 14% of the action level.

Does Lenapah 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 Lenapah? ▼

Lenapah Public Works Authority (PWSID OK1021501), one of 2 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW

When was this system last inspected? ▼

It was last inspected on 2026-03-17. No significant deficiencies were recorded.

What Should Lenapah Residents Do?

Read your annual water report

Your supplier publishes a Consumer Confidence Report each July covering the prior year.

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.

Flush before drinking

If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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