Tecumseh, OK Tap Water Quality 2026

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

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

Main Utility: Tecumseh Utility Authority PWSID: OK1020506 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead was not detected and no violations are open. No PFAS was detected.

Tecumseh earns a B for water quality

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

Lead: not detected

PFAS tested, none detected

50 violations since 2015, 36 health-based

No violations currently open

Tecumseh'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

6301

~2559 connections

Water Source

Surface water

Drawn from surface water — SDWIS source code SW

Active Violations

50 since 2015, all resolved

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)

Contaminant	Type	Measured	Limit	Period	Status
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2025	Resolved
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2025	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.063 MG/L	0.060 mg/L	2025	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.066 MG/L	0.060 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.111 MG/L	0.080 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.091 MG/L	0.080 mg/L	2025	Archived
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2025	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.064 MG/L	0.060 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.101 MG/L	0.080 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.126 MG/L	0.080 mg/L	2025	Archived
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2025	Resolved
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2025	Resolved
TTHM	MCL EXCEEDANCE	0.091 MG/L	0.080 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.125 MG/L	0.080 mg/L	2025	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.062 MG/L	0.060 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.134 MG/L	0.080 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.105 MG/L	0.080 mg/L	2025	Archived
TTHM	MCL EXCEEDANCE	0.118 MG/L	0.080 mg/L	2024	Archived
TTHM	MCL EXCEEDANCE	0.086 MG/L	0.080 mg/L	2024	Archived
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2024	Resolved
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2024	Resolved
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2023	Archived
TTHM	MCL EXCEEDANCE	0.091 MG/L	0.080 mg/L	2023	Archived
TTHM	MCL EXCEEDANCE	0.094 MG/L	0.080 mg/L	2023	Archived
TTHM	MCL EXCEEDANCE	0.107 MG/L	0.080 mg/L	2023	Archived
TTHM	MCL EXCEEDANCE	0.107 MG/L	0.080 mg/L	2023	Archived
TTHM	MCL EXCEEDANCE	0.095 MG/L	0.080 mg/L	2022	Archived
TTHM	MCL EXCEEDANCE	0.105 MG/L	0.080 mg/L	2022	Archived
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2022	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.063 MG/L	0.060 mg/L	2022	Archived
TTHM	MCL EXCEEDANCE	0.111 MG/L	0.080 mg/L	2022	Archived
TTHM	MCL EXCEEDANCE	0.121 MG/L	0.080 mg/L	2022	Archived
TTHM	MCL EXCEEDANCE	0.121 MG/L	0.080 mg/L	2022	Archived
TTHM	MCL EXCEEDANCE	0.116 MG/L	0.080 mg/L	2022	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.063 MG/L	0.060 mg/L	2022	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.075 MG/L	0.060 mg/L	2022	Archived
TTHM	MCL EXCEEDANCE	0.123 MG/L	0.080 mg/L	2022	Archived
TTHM	MCL EXCEEDANCE	0.123 MG/L	0.080 mg/L	2022	Archived
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2021	Resolved
CARBON, TOTAL	TREATMENT TECHNIQUE	0.97 RATIO	TT	2021	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.073 MG/L	0.060 mg/L	2021	Archived
TTHM	MCL EXCEEDANCE	0.118 MG/L	0.080 mg/L	2021	Archived
TTHM	MCL EXCEEDANCE	0.117 MG/L	0.080 mg/L	2021	Archived
TTHM	MCL EXCEEDANCE	0.083 MG/L	0.080 mg/L	2021	Archived
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2019	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2019	Resolved
TTHM	MCL EXCEEDANCE	0.086 MG/L	0.080 mg/L	2019	Archived
Interim Enhanced Surface Water Treatment Rule	MONITORING AND REPORTING	—	—	2019	Resolved
Coliform (TCR)	MONITORING AND REPORTING	—	5% of samples	2015	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2015	Archived

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

50 violations are on record since 2015, of which 36 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Tecumseh Utility Authority

PWSID OK1020506

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

Population served 6,301

Service connections 2,559

Systems serving this area 4

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Tecumseh tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open.

Does Tecumseh water have PFAS? ▼

It was tested for the six regulated PFAS compounds and none were detected.

Who supplies water to Tecumseh? ▼

Tecumseh Utility Authority (PWSID OK1020506), one of 4 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 2025-10-10. No significant deficiencies were recorded.

What Should Tecumseh 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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