MAYES CO RWD # 6

Q: Is MAYES CO RWD # 6 water safe to drink?

MAYES CO RWD # 6 (PWS ID: OK1021666) has 66 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,750 people using Surface Water sources.

Q: How many people does MAYES CO RWD # 6 serve?

MAYES CO RWD # 6 serves 3,750 people in BIG CABIN, Oklahoma. It is a Local-owned system using Surface Water water sources with 1,987 service connections.

Q: What type of violations does MAYES CO RWD # 6 have?

MAYES CO RWD # 6 has 66 total violations: 20 health-based violations (MCL exceedances or treatment failures), 34 monitoring/reporting violations, and 18 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in MAYES CO RWD # 6 water?

No. MAYES CO RWD # 6 was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

Q: What water source does MAYES CO RWD # 6 use?

MAYES CO RWD # 6 uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Q: Where does this data come from?

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Reviewed byPlainWater Editorial, Drinking Water Quality Editorial Team · June 4, 2026

PWS ID: OK1021666 · BIG CABIN, Oklahoma 74332

MAYES CO RWD # 6 serves 3,750 people in BIG CABIN, Oklahoma using Surface Water water sources. It has 66 recorded EPA violations, including 20 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: MAYES CO RWD # 6

MAYES CO RWD # 6 is a local-owned community water system that delivers drinking water to 3,750 residents in BIG CABIN, Oklahoma (Mayes County) through 1,987 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 66 total violations for this system , of which 20 (30%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 34 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is CARBON, TOTAL, recorded in 16 violations (TT, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Oklahoma, EPA tracks 1,262 public water systems serving 3,699,452 people, with 336,706 cumulative violations and 113,804 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 266.8 violations. MAYES CO RWD # 6's 66 violations sit below the Oklahoma average. Statewide, 101 of 166 UCMR5-tested systems have reported PFAS detections (60.8%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served

3,750

Total Violations

Health-Based Violations

Water Source

Surface Water

System Details

System Type: Community
Owner Type: Local
Connections: 1,987
County: Mayes
School/Daycare: No
MCL Violations: 2
Monitoring Violations: 34
Treatment Tech Violations: 18

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
CARBON, TOTAL	TT	16	2006
Nitrate-Nitrite	MR	9	2007
Coliform (TCR)	MR	6	2003
Total Haloacetic Acids (HAA5)	MR	4	2022
Arsenic	MR	4	2007
TTHM	MR	4	2022
BHC-GAMMA	MR	4	2005
2,4-D	MR	3	2005
Coliform (TCR)	MCL	2	1994
Surface Water Treatment Rule	TT	2	1993

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 120 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFEESA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMPA	9/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFUnA	9/13/2023	<0.002 µg/L	0.002 µg/L	Not Detected
8:2 FTS	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFHpA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
4:2 FTS	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxS	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
9Cl-PF3ONS	9/13/2023	<0.002 µg/L	0.002 µg/L	Not Detected
PFNA	9/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	9/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
NFDHA	9/13/2023	<0.02 µg/L	0.02 µg/L	Not Detected
PFOA	9/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
NMeFOSAA	9/13/2023	<0.006 µg/L	0.006 µg/L	Not Detected
11Cl-PF3OUdS	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
HFPO-DA	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
ADONA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFDoA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFDA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFTrDA	9/13/2023	<0.007 µg/L	0.007 µg/L	Not Detected
NEtFOSAA	9/13/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFTA	9/13/2023	<0.008 µg/L	0.008 µg/L	Not Detected
PFPeS	9/13/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHpS	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
lithium	9/13/2023	<9 µg/L	9 µg/L	Not Detected
PFHxA	9/13/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NMeFOSAA	6/20/2023	<0.006 µg/L	0.006 µg/L	Not Detected
PFTrDA	6/20/2023	<0.007 µg/L	0.007 µg/L	Not Detected
PFTA	6/20/2023	<0.008 µg/L	0.008 µg/L	Not Detected
NEtFOSAA	6/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFPeA	6/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
9Cl-PF3ONS	6/20/2023	<0.002 µg/L	0.002 µg/L	Not Detected
ADONA	6/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	6/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
6:2 FTS	6/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
lithium	6/20/2023	<9 µg/L	9 µg/L	Not Detected
PFMPA	6/20/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFBA	6/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFMBA	6/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFEESA	6/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NFDHA	6/20/2023	<0.02 µg/L	0.02 µg/L	Not Detected
PFPeS	6/20/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHpS	6/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
8:2 FTS	6/20/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFDoA	6/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected
4:2 FTS	6/20/2023	<0.003 µg/L	0.003 µg/L	Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for MAYES CO RWD # 6.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID OK1021666 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Oklahoma Drinking Water Authority

Oklahoma's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find OK regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest)	Contaminant	Category	Count	EPA Record
2022	Total Haloacetic Acids (HAA5)	MR	4	SDWIS / OK1021666 / 2456
2022	TTHM	MR	4	SDWIS / OK1021666 / 2950
2007	Nitrate-Nitrite	MR	9	SDWIS / OK1021666 / 1038
2007	Arsenic	MR	4	SDWIS / OK1021666 / 1005
2006	CARBON, TOTAL	TT	16	SDWIS / OK1021666 / 2920
2005	BHC-GAMMA	MR	4	SDWIS / OK1021666 / 2010
2005	2,4-D	MR	3	SDWIS / OK1021666 / 2105
2003	Coliform (TCR)	MR	6	SDWIS / OK1021666 / 3100
1994	Coliform (TCR)	MCL	2	SDWIS / OK1021666 / 3100
1993	Surface Water Treatment Rule	TT	2	SDWIS / OK1021666 / 0200

How MAYES CO RWD # 6 Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric	MAYES CO RWD # 6	Oklahoma avg	Federal benchmark
Total violations	66	266.8	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	20	90.2	Indicates a contaminant exceeded a federal MCL
PFAS detection	None	60.8%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	3,750	2,931	Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,262 regulated public water systems in Oklahoma.

Federal MCL reference — Safe Drinking Water Act thresholds ▼

Contaminant	Federal MCL / Action Level	Note
Lead	0 mg/L (Action Level: 0.015 mg/L)	Lead and Copper Rule treatment technique
Arsenic	0.010 mg/L (10 ppb)	Health-based MCL since 2006
Total Coliform	Treatment technique (RTCR)	Indicator organism, monitoring trigger
PFOA / PFOS (PFAS)	4.0 ppt each (final 2024 rule)	Compliance deadline 2029
Nitrate (as N)	10 mg/L	Acute health risk for infants

Frequently Asked Questions

Is MAYES CO RWD # 6 water safe to drink? ▼

MAYES CO RWD # 6 (PWS ID: OK1021666) has 66 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,750 people using Surface Water sources.

How many people does MAYES CO RWD # 6 serve? ▼

MAYES CO RWD # 6 serves 3,750 people in BIG CABIN, Oklahoma. It is a Local-owned system using Surface Water water sources with 1,987 service connections.

What type of violations does MAYES CO RWD # 6 have? ▼

MAYES CO RWD # 6 has 66 total violations: 20 health-based violations (MCL exceedances or treatment failures), 34 monitoring/reporting violations, and 18 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in MAYES CO RWD # 6 water? ▼

No. MAYES CO RWD # 6 was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

What water source does MAYES CO RWD # 6 use? ▼

MAYES CO RWD # 6 uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Where does this data come from? ▼

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial