TECUMSEH UTILITY AUTHORITY

Compiled by PlainEnviro Editorial, Environmental Data Editorial Team · July 13, 2026

PWSID: OK1020506 · Tecumseh, OK · Serves 6,098 people

Health Violations

TECUMSEH UTILITY AUTHORITY has 114 health-based violations out of 114 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.

Population Served

6,098

Total Violations

114

Health Violations

114

Source Type

Surface Water

TECUMSEH UTILITY AUTHORITY (PWSID OK1020506) is a cws water system drawing from a surface water source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 6,098 people in Tecumseh, OK, and is subject to primacy enforcement by the Oklahoma drinking-water program.

The system's federal compliance record contains 114 total violations, with 114 classified as health-based (MCL exceedances or treatment-technique failures). 4 distinct contaminants have been cited, including Total Trihalomethanes (TTHM), Haloacetic Acids (HAA5), Chloroform. Recorded violations span 1990–2025.

A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Oklahoma state drinking-water program's public portal.

System Details

EPA ID (PWSID): OK1020506
System Type: CWS
Water Source: Surface Water
Location: Tecumseh, OK
Population Served: 6,098
Health Violations: Yes (114)

What contaminants are in this water system?

Contaminant	Violations	Health-Based
Total Trihalomethanes (TTHM)	85	85
Haloacetic Acids (HAA5)	21	21
Chloroform	6	6
Antimony	2	2

Violation History (114)

Contaminant	Type	Health	Date	Enforcement
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2025	1013303
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2025	1013303
Haloacetic Acids (HAA5)	MCL	Yes	Jan 1, 2025	1013295
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2025	1013295
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2025	1013295
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2024	1013292
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2024	1013292
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	1013284
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	1013284
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	1013284
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	1013282
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	1013282
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	1013282
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	1013282
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	1013281
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	1013281
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	1013275
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	1013281
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	1013281
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	1013281
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	1013275
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	1013281
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	1013280
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	1013280
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	1013273
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	1013280
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	1013280
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	1013280
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	1013273
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	1013280
Haloacetic Acids (HAA5)	MCL	Yes	Jul 1, 2022	1013279
Haloacetic Acids (HAA5)	MCL	Yes	Jul 1, 2022	1013279
Haloacetic Acids (HAA5)	MCL	Yes	Jul 1, 2022	1013268
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	1013279
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	1013279
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	1013268
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	1013279
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	1013279
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	1013268
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	1013268
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	1013279
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	1013279
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	1013268
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	1013268
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	1013279
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	1013279
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	1013268
Haloacetic Acids (HAA5)	MCL	Yes	Apr 1, 2022	1013268
Haloacetic Acids (HAA5)	MCL	Yes	Apr 1, 2022	1013279
Haloacetic Acids (HAA5)	MCL	Yes	Apr 1, 2022	1013279
Haloacetic Acids (HAA5)	MCL	Yes	Apr 1, 2022	1013268
Haloacetic Acids (HAA5)	MCL	Yes	Jan 1, 2022	1013266
Haloacetic Acids (HAA5)	MCL	Yes	Jan 1, 2022	1013278
Haloacetic Acids (HAA5)	MCL	Yes	Jan 1, 2022	1013278
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	1013266
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	1013278
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	1013278
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	1013266
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	1013278
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	1013278
Chloroform	TT	Yes	Oct 1, 2021	1013263
Chloroform	TT	Yes	Oct 1, 2021	1013263
Haloacetic Acids (HAA5)	MCL	Yes	Oct 1, 2021	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2012	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2011	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2011	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2011	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2011	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2010	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2010	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2010	1013263
Chloroform	TT	Yes	Apr 1, 2010	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2010	1013263
Chloroform	TT	Yes	Jan 1, 2010	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2009	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2009	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2009	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2008	1013263
Haloacetic Acids (HAA5)	MCL	Yes	Apr 1, 2008	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2008	1013263
Haloacetic Acids (HAA5)	MCL	Yes	Jan 1, 2008	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2008	1013263
Chloroform	TT	Yes	Jan 1, 2008	1013263
Haloacetic Acids (HAA5)	MCL	Yes	Oct 1, 2007	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2007	1013263
Haloacetic Acids (HAA5)	MCL	Yes	Jul 1, 2007	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2007	1013263
Haloacetic Acids (HAA5)	MCL	Yes	Apr 1, 2007	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2007	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2007	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2006	1013263
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2006	1013263
Chloroform	TT	Yes	Jul 1, 2006	1013263

Showing 100 of 114 violations.

Frequently Asked Questions

Is TECUMSEH UTILITY AUTHORITY water safe to drink?

TECUMSEH UTILITY AUTHORITY has 114 health-based violations out of 114 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed. The system uses surface water water as its source.

How many people does TECUMSEH UTILITY AUTHORITY serve?

TECUMSEH UTILITY AUTHORITY serves 6,098 people in Tecumseh, OK. It is classified as a CWS water system.

What violations does TECUMSEH UTILITY AUTHORITY have?

TECUMSEH UTILITY AUTHORITY has 114 total violations on record spanning 1990–2025. 114 are health-based violations involving contaminants exceeding EPA limits.

What contaminants have been found in TECUMSEH UTILITY AUTHORITY water?

Violations have been recorded for 4 contaminants. The most frequent: Total Trihalomethanes (TTHM), Haloacetic Acids (HAA5), Chloroform.

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About This Data

Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.

Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services

Read our methodology - how this data is sourced, computed, and verified.

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