PAWNEE

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

PWSID: OK1021209 · Pawnee, OK · Serves 2,230 people

Health Violations

PAWNEE has 140 health-based violations out of 140 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.

Population Served

2,230

Total Violations

140

Health Violations

140

Source Type

Surface Water

PAWNEE (PWSID OK1021209) 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 2,230 people in Pawnee, OK, and is subject to primacy enforcement by the Oklahoma drinking-water program.

The system's federal compliance record contains 140 total violations, with 140 classified as health-based (MCL exceedances or treatment-technique failures). 6 distinct contaminants have been cited, including Total Trihalomethanes (TTHM), Arsenic, Chloroform. Recorded violations span 1993–2025.

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): OK1021209
System Type: CWS
Water Source: Surface Water
Location: Pawnee, OK
Population Served: 2,230
Health Violations: Yes (140)

What contaminants are in this water system?

Contaminant	Violations	Health-Based
Total Trihalomethanes (TTHM)	82	82
Arsenic	19	19
Chloroform	19	19
Haloacetic Acids (HAA5)	18	18
Gross Alpha	1	1
Antimony	1	1

Violation History (140)

Contaminant	Type	Health	Date	Enforcement
Arsenic	TT	Yes	Jun 1, 2025	-
Arsenic	TT	Yes	May 1, 2025	-
Arsenic	TT	Yes	Apr 1, 2025	-
Gross Alpha	TT	Yes	Oct 17, 2024	9060385
Arsenic	TT	Yes	Jun 1, 2024	9060298
Arsenic	TT	Yes	Jun 1, 2024	9060298
Arsenic	TT	Yes	Jun 1, 2024	-
Arsenic	TT	Yes	Jun 1, 2024	9060298
Arsenic	TT	Yes	Jun 1, 2024	9060298
Arsenic	TT	Yes	Jun 1, 2024	-
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	9060333
Arsenic	TT	Yes	Apr 1, 2024	9060298
Arsenic	TT	Yes	Apr 1, 2024	9060298
Arsenic	TT	Yes	Apr 1, 2024	-
Arsenic	TT	Yes	Apr 1, 2024	9060298
Arsenic	TT	Yes	Apr 1, 2024	9060298
Arsenic	TT	Yes	Apr 1, 2024	-
Arsenic	TT	Yes	Mar 1, 2024	9060298
Arsenic	TT	Yes	Mar 1, 2024	-
Arsenic	TT	Yes	Mar 1, 2024	9060298
Arsenic	TT	Yes	Mar 1, 2024	-
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	9060321
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9060312
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9060312
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	-
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9060312
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9060312
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9060312
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	-
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9060312
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9060313
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9060306
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9060313
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9060313
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9060314
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9060300
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9060314
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9060315
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9060315
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	-
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9060316
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9060316
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9060291
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9060298
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	9060263
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	9060317
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2017	9060263
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2016	9060263
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2015	9060263
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2014	9060263
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2014	9060263
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2014	9060263
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2014	9060263
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2013	9060263
Chloroform	TT	Yes	Apr 1, 2013	9060215
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2012	9060384
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2012	9060383
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2012	9060382
Chloroform	TT	Yes	Apr 1, 2012	9060214
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2012	9060381
Chloroform	TT	Yes	Jan 1, 2012	9060213
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2011	9060380
Chloroform	TT	Yes	Oct 1, 2011	9060212
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2011	9060379
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2011	9060378
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2011	9060377
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2010	9060376
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2010	9060375
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2010	9060374
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2010	9060373
Chloroform	TT	Yes	Jan 1, 2010	9060211
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2009	9060372
Chloroform	TT	Yes	Oct 1, 2009	9060210
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2009	9060371
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2009	9060370
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2009	9060369
Haloacetic Acids (HAA5)	MCL	Yes	Jan 1, 2009	9060209
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2008	9060368
Haloacetic Acids (HAA5)	MCL	Yes	Oct 1, 2008	9060207
Chloroform	TT	Yes	Oct 1, 2008	9060208
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2008	9060367
Haloacetic Acids (HAA5)	MCL	Yes	Jul 1, 2008	9060206
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2008	9060366
Haloacetic Acids (HAA5)	MCL	Yes	Apr 1, 2008	9060205
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2008	9060365
Haloacetic Acids (HAA5)	MCL	Yes	Jan 1, 2008	9060204

Showing 100 of 140 violations.

Frequently Asked Questions

Is PAWNEE water safe to drink?

PAWNEE has 140 health-based violations out of 140 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 PAWNEE serve?

PAWNEE serves 2,230 people in Pawnee, OK. It is classified as a CWS water system.

What violations does PAWNEE have?

PAWNEE has 140 total violations on record spanning 1993–2025. 140 are health-based violations involving contaminants exceeding EPA limits.

What contaminants have been found in PAWNEE water?

Violations have been recorded for 6 contaminants. The most frequent: Total Trihalomethanes (TTHM), Arsenic, Chloroform.

Nearby Water Systems

CLEVELAND MUNICIPAL AUTHORITY

Cleveland · 3,262 served

337 viol.

PAWNEE CO RWD #1

Cleveland · 3,200 served

Clean

PAWNEE CO RWD #2

Terlton · 1,775 served

Pawnee Tribal Complex

WESTPORT UTILITY AUTHORITY TRUST

Cleveland · 289 served

HALLETT PUBLIC WORKS AUTHORITY

Hallett · 168 served

7 viol.

EDGEWATER RV PARK

Cleveland · 93 served

Clean

Explore More

Oklahoma Water Systems → All States → Contaminants →

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.

Browse all → | Rankings →