RYAN UTILITIES AUTHORITY

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

PWSID: OK3003405 · Ryan, OK · Serves 800 people

Health Violations

RYAN UTILITIES AUTHORITY has 295 health-based violations out of 295 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.

Population Served

800

Total Violations

295

Health Violations

295

Source Type

Surface Water

RYAN UTILITIES AUTHORITY (PWSID OK3003405) 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 800 people in Ryan, OK, and is subject to primacy enforcement by the Oklahoma drinking-water program.

The system's federal compliance record contains 295 total violations, with 295 classified as health-based (MCL exceedances or treatment-technique failures). 3 distinct contaminants have been cited, including Total Trihalomethanes (TTHM), Haloacetic Acids (HAA5), Gross Alpha. Recorded violations span 2007–2025.

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): OK3003405
System Type: CWS
Water Source: Surface Water
Location: Ryan, OK
Population Served: 800
Health Violations: Yes (295)

What contaminants are in this water system?

Contaminant	Violations	Health-Based
Total Trihalomethanes (TTHM)	199	199
Haloacetic Acids (HAA5)	95	95
Gross Alpha	1	1

Violation History (295)

Contaminant	Type	Health	Date	Enforcement
Haloacetic Acids (HAA5)	MCL	Yes	Jul 1, 2025	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2025	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2025	9156358
Haloacetic Acids (HAA5)	MCL	Yes	Apr 1, 2025	9156358
Haloacetic Acids (HAA5)	MCL	Yes	Apr 1, 2025	9156403
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2025	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2025	9156403
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2025	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2025	9156403
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2025	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2025	9156364
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2025	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2025	9156364
Gross Alpha	TT	Yes	Oct 17, 2024	9156399
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2024	9156360
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2024	9156361
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2024	9156360
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2024	9156361
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	9156317
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	9156357
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	9156317
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	9156357
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	9156317
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	9156354
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	9156317
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	9156354
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	9156351
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	9156351
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	9156351
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	9156351
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9156349
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9156317
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9156349
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9156349
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9156349
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9156317
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9156349
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	9156349
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9156342
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9156341
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9156342
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9156342
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9156342
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9156341
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9156342
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	9156342
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9156339
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9156317
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9156339
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9156339
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9156317
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	9156339
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9156336
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9156336
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9156317
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9156336
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9156336
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9156336
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9156317
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	9156336
Haloacetic Acids (HAA5)	MCL	Yes	Oct 1, 2022	9156333
Haloacetic Acids (HAA5)	MCL	Yes	Oct 1, 2022	9156333
Haloacetic Acids (HAA5)	MCL	Yes	Oct 1, 2022	9156358
Haloacetic Acids (HAA5)	MCL	Yes	Oct 1, 2022	9156333
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9156333
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9156333
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9156333
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9156333
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9156333
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	9156333
Haloacetic Acids (HAA5)	MCL	Yes	Jul 1, 2022	9156333
Haloacetic Acids (HAA5)	MCL	Yes	Jul 1, 2022	9156333
Haloacetic Acids (HAA5)	MCL	Yes	Jul 1, 2022	9156358
Haloacetic Acids (HAA5)	MCL	Yes	Jul 1, 2022	9156333
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	9156333
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	9156333
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	9156358
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	9156333
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	9156333
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	9156333

Showing 100 of 295 violations.

Frequently Asked Questions

Is RYAN UTILITIES AUTHORITY water safe to drink?

RYAN UTILITIES AUTHORITY has 295 health-based violations out of 295 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 RYAN UTILITIES AUTHORITY serve?

RYAN UTILITIES AUTHORITY serves 800 people in Ryan, OK. It is classified as a CWS water system.

What violations does RYAN UTILITIES AUTHORITY have?

RYAN UTILITIES AUTHORITY has 295 total violations on record spanning 2007–2025. 295 are health-based violations involving contaminants exceeding EPA limits.

What contaminants have been found in RYAN UTILITIES AUTHORITY water?

Violations have been recorded for 3 contaminants. The most frequent: Total Trihalomethanes (TTHM), Haloacetic Acids (HAA5), Gross Alpha.

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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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