DEWEY PUBLIC WORKS AUTHORITY

Q: Is DEWEY PUBLIC WORKS AUTHORITY water safe to drink?

DEWEY PUBLIC WORKS AUTHORITY (PWS ID: OK3007402) has 61 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 3,490 people using Surface Water sources.

Q: What type of violations does DEWEY PUBLIC WORKS AUTHORITY have?

DEWEY PUBLIC WORKS AUTHORITY has 61 total violations: 14 health-based violations (MCL exceedances or treatment failures), 32 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in DEWEY PUBLIC WORKS AUTHORITY water?

Yes. UCMR5 testing detected 1 PFAS compound in DEWEY PUBLIC WORKS AUTHORITY's water supply: PFBA. PFAS are persistent "forever chemicals" that do not break down in the environment.

Q: What water source does DEWEY PUBLIC WORKS AUTHORITY use?

DEWEY PUBLIC WORKS AUTHORITY 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: OK3007402 · DEWEY, Oklahoma 74029

DEWEY PUBLIC WORKS AUTHORITY serves 3,490 people in DEWEY, Oklahoma using Surface Water water sources. It has 61 recorded EPA violations, including 14 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: DEWEY PUBLIC WORKS AUTHORITY

DEWEY PUBLIC WORKS AUTHORITY is a local-owned community water system that delivers drinking water to 3,490 residents in DEWEY, Oklahoma (Washington County) through 1,736 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 61 total violations for this system , of which 14 (23%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 32 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is TTHM, recorded in 11 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 0.011 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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. DEWEY PUBLIC WORKS AUTHORITY's 61 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.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served

3,490

Total Violations

Health-Based Violations

Water Source

Surface Water

System Details

System Type: Community
Owner Type: Local
Connections: 1,736
County: Washington
School/Daycare: No
MCL Violations: 13
Monitoring Violations: 32
Treatment Tech Violations: 1

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
TTHM	MCL	11	2024
TTHM	MR	10	2024
Total Haloacetic Acids (HAA5)	MR	8	2017
Coliform (TCR)	MR	6	2009
Consumer Confidence Rule	Other	4	2016
Revised Total Coliform Rule	MON	4	2022
Chlorine	MR	4	2022
Coliform (TCR)	MCL	2	1996
LEAD AND COPPER RULE REVISIONS	TT	1	2024
LEAD AND COPPER RULE REVISIONS	RPT	1	2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 5 of 240 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFBA	8/8/2023	0.0059 µg/L	0.005 µg/L	Detected
NEtFOSAA	8/8/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFTrDA	8/8/2023	<0.007 µg/L	0.007 µg/L	Not Detected
PFTA	8/8/2023	<0.008 µg/L	0.008 µg/L	Not Detected
lithium	8/8/2023	<9 µg/L	9 µg/L	Not Detected
PFHpS	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	8/8/2023	<0.004 µg/L	0.004 µg/L	Not Detected
NFDHA	8/8/2023	<0.02 µg/L	0.02 µg/L	Not Detected
PFEESA	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMPA	8/8/2023	<0.004 µg/L	0.004 µg/L	Not Detected
8:2 FTS	8/8/2023	<0.005 µg/L	0.005 µg/L	Not Detected
NMeFOSAA	8/8/2023	<0.006 µg/L	0.006 µg/L	Not Detected
6:2 FTS	8/8/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFDA	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	8/8/2023	<0.005 µg/L	0.005 µg/L	Not Detected
ADONA	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
9Cl-PF3ONS	8/8/2023	<0.002 µg/L	0.002 µg/L	Not Detected
11Cl-PF3OUdS	8/8/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFUnA	8/8/2023	<0.002 µg/L	0.002 µg/L	Not Detected
PFHxA	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFOA	8/8/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFNA	8/8/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFHxS	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
4:2 FTS	8/8/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFOS	8/8/2023	<0.004 µg/L	0.004 µg/L	Not Detected
lithium	8/8/2023	<9 µg/L	9 µg/L	Not Detected
NMeFOSAA	8/8/2023	<0.006 µg/L	0.006 µg/L	Not Detected
NEtFOSAA	8/8/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFTA	8/8/2023	<0.008 µg/L	0.008 µg/L	Not Detected
PFTrDA	8/8/2023	<0.007 µg/L	0.007 µg/L	Not Detected
ADONA	5/10/2023	<0.003 µg/L	0.003 µg/L	Not Detected
11Cl-PF3OUdS	5/10/2023	<0.005 µg/L	0.005 µg/L	Not Detected
lithium	5/10/2023	<9 µg/L	9 µg/L	Not Detected
PFTA	5/10/2023	<0.008 µg/L	0.008 µg/L	Not Detected
PFTrDA	5/10/2023	<0.007 µg/L	0.007 µg/L	Not Detected
NEtFOSAA	5/10/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFDA	5/10/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFOS	5/10/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFBS	5/10/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	5/10/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxS	5/10/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFNA	5/10/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOA	5/10/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFDoA	5/10/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFBA	5/10/2023	<0.005 µg/L	0.005 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 DEWEY PUBLIC WORKS AUTHORITY.

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 OK3007402 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
2024	TTHM	MCL	11	SDWIS / OK3007402 / 2950
2024	TTHM	MR	10	SDWIS / OK3007402 / 2950
2024	LEAD AND COPPER RULE REVISIONS	TT	1	SDWIS / OK3007402 / 5200
2024	LEAD AND COPPER RULE REVISIONS	RPT	1	SDWIS / OK3007402 / 5200
2022	Revised Total Coliform Rule	MON	4	SDWIS / OK3007402 / 8000
2022	Chlorine	MR	4	SDWIS / OK3007402 / 0999
2017	Total Haloacetic Acids (HAA5)	MR	8	SDWIS / OK3007402 / 2456
2016	Consumer Confidence Rule	Other	4	SDWIS / OK3007402 / 7000
2009	Coliform (TCR)	MR	6	SDWIS / OK3007402 / 3100
1996	Coliform (TCR)	MCL	2	SDWIS / OK3007402 / 3100

How DEWEY PUBLIC WORKS AUTHORITY Compares

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

Metric	DEWEY PUBLIC WORKS AUTHORITY	Oklahoma avg	Federal benchmark
Total violations	61	266.8	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	14	90.2	Indicates a contaminant exceeded a federal MCL
PFAS detection	1 compound	60.8%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	3,490	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 DEWEY PUBLIC WORKS AUTHORITY water safe to drink? ▼

DEWEY PUBLIC WORKS AUTHORITY (PWS ID: OK3007402) has 61 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 3,490 people using Surface Water sources.

How many people does DEWEY PUBLIC WORKS AUTHORITY serve? ▼

DEWEY PUBLIC WORKS AUTHORITY serves 3,490 people in DEWEY, Oklahoma. It is a Local-owned system using Surface Water water sources with 1,736 service connections.

What type of violations does DEWEY PUBLIC WORKS AUTHORITY have? ▼

DEWEY PUBLIC WORKS AUTHORITY has 61 total violations: 14 health-based violations (MCL exceedances or treatment failures), 32 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in DEWEY PUBLIC WORKS AUTHORITY water? ▼

Yes. UCMR5 testing detected 1 PFAS compound in DEWEY PUBLIC WORKS AUTHORITY's water supply: PFBA. PFAS are persistent "forever chemicals" that do not break down in the environment.

What water source does DEWEY PUBLIC WORKS AUTHORITY use? ▼

DEWEY PUBLIC WORKS AUTHORITY 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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