Leonard, OK Tap Water Quality 2026

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

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

Main Utility: Wagoner Co. Rwd #4 PWSID: OK1021529 Updated: 2026 Q2

⚠️

PFAS above the federal limit

Lead is 1.00 ppb, 7% of the action level and no violations are open. However, PFAS exceeds the federal limit at 1 of 1 sampling points, running as high as 4.21 times the limit.

Leonard earns a D for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 1.00 ppb — 7% of the federal action level

PFAS above the federal limit at 1 of 1 sampling points

49 violations since 2015, 44 health-based

No violations currently open

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

0 ppb5 ppb10 ppb15 ppb

Lead level: 1.00 ppb — 7% of the federal action level

✓ Lower lead than 87% of Oklahoma utilities

Population Served

~13907 connections

Water Source

Surface water

Drawn from surface water — SDWIS source code SW

Active Violations

49 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

7% of EPA action level

1.00 ppb

Action level: 15 ppb

The 90th-percentile lead result is 1.00 ppb, 7% 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
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Interim Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Archived
Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Archived
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Archived
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2025	Archived
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2024	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2024	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2024	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2024	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2024	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2024	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2023	Archived
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2023	Archived
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2023	Archived
TTHM	MCL EXCEEDANCE	0.083 MG/L	0.080 mg/L	2023	Archived
Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2022	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2022	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2022	Archived
TTHM	MCL EXCEEDANCE	0.087 MG/L	0.080 mg/L	2022	Archived
TTHM	MCL EXCEEDANCE	0.084 MG/L	0.080 mg/L	2022	Archived
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2021	Resolved
TTHM	MCL EXCEEDANCE	0.086 MG/L	0.080 mg/L	2021	Archived
Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2021	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2020	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2019	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2019	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2018	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2018	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2018	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2018	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2018	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2017	Resolved
Consumer Confidence Rule	OTHER	—	—	2016	Resolved
TTHM	MCL EXCEEDANCE	0.088 MG/L	0.080 mg/L	2015	Resolved
Long Term 2 Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2015	Resolved
Coliform (TCR)	MCL EXCEEDANCE	—	5% of samples	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

49 violations are on record since 2015, of which 44 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Wagoner Co. Rwd #4

PWSID OK1021529

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

Population served

Service connections 13,907

Systems serving this area 1

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Leonard tap water safe to drink? ▼

It meets most federal standards, but PFAS exceeds the federal limit at 1 of 1 sampling points. No violations are currently open. Lead is 1.00 ppb, 7% of the action level.

Does Leonard water have PFAS? ▼

Yes. PFAS exceeds the federal limit at 1 of 1 sampling points, running as high as 4.21 times the limit. Limits are enforced on a running annual average at each sampling point, not on a single sample.

Who supplies water to Leonard? ▼

Wagoner Co. Rwd #4 (PWSID OK1021529). Surface water. Drawn from surface water — SDWIS source code SW

When was this system last inspected? ▼

It was last inspected on 2025-08-27. No significant deficiencies were recorded.

What Should Leonard Residents Do?

Consider a reverse-osmosis filter

Reverse osmosis removes more than 95% of PFAS. Standard carbon pitchers do not.

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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