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Community Water System · PWS OK2002166

Bernice PWA

Bernice, Oklahoma 74331-3771 - drinking water served from surface water sources to 504 people, tracked in EPA SDWIS and UCMR5.

504
People served
464
EPA violations
24
Health-based
Untested
UCMR5 result

The verdict

EPA records 464 drinking-water violations at Bernice PWA, 5% of them health-based - above the Oklahoma per-system average.

464
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
504
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Bernice PWA

Bernice PWA is a local-owned community water system that delivers drinking water to 504 residents in Bernice, Oklahoma (Delaware County) through 380 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 464 total violations for this system , of which 24 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 429 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Chlorine, recorded in 24 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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. Statewide, 101 of 166 UCMR5-tested systems have reported PFAS detections (60.8%).

Bernice PWA's 464 violations sit above the Oklahoma average.

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
504
Total Violations
464
Health-Based Violations
24
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
380
County
Delaware
School/Daycare
No
MCL Violations
24
Monitoring Violations
429
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 24 2025
cis-1,2-Dichloroethylene MR 16 2020
DICHLOROMETHANE MR 16 2020
o-Dichlorobenzene MR 16 2020
p-Dichlorobenzene MR 16 2020
Vinyl chloride MR 16 2020
1,1-Dichloroethylene MR 16 2020
1,2-Dichloroethane MR 16 2020
1,1,1-Trichloroethane MR 16 2020
1,2-Dichloropropane MR 16 2020
1,1,2-Trichloroethane MR 16 2020
Toluene MR 16 2020
Ethylbenzene MR 16 2020
Xylenes, Total MR 16 2020
trans-1,2-Dichloroethylene MR 16 2020
Tetrachloroethylene MR 16 2020
CHLOROBENZENE MR 16 2020
Benzene MR 16 2020
Styrene MR 16 2020
1,2,4-Trichlorobenzene MR 16 2020
Carbon tetrachloride MR 16 2020
Trichloroethylene MR 16 2020
Revised Total Coliform Rule MON 16 2025
Coliform (TCR) MR 13 2015
Gross Alpha, Excl. Radon and U MCL 12 2015
Fluoride MCL 11 1983
Nitrate-Nitrite MR 8 2016
Total Haloacetic Acids (HAA5) MR 5 2025
TTHM MR 5 2025
Gross Alpha, Excl. Radon and U MR 4 2022

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 Bernice PWA.

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 OK2002166 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
2025 Chlorine MR 24 SDWIS / OK2002166 / 0999
2025 Revised Total Coliform Rule MON 16 SDWIS / OK2002166 / 8000
2025 Total Haloacetic Acids (HAA5) MR 5 SDWIS / OK2002166 / 2456
2025 TTHM MR 5 SDWIS / OK2002166 / 2950
2022 Gross Alpha, Excl. Radon and U MR 4 SDWIS / OK2002166 / 4000
2022 Combined Uranium MR 4 SDWIS / OK2002166 / 4006
2022 Gross Beta Particle Activity MR 4 SDWIS / OK2002166 / 4100
2022 Combined Radium (-226 and -228) MR 4 SDWIS / OK2002166 / 4010
2021 E. COLI MR 4 SDWIS / OK2002166 / 3014
2020 cis-1,2-Dichloroethylene MR 16 SDWIS / OK2002166 / 2380
2020 DICHLOROMETHANE MR 16 SDWIS / OK2002166 / 2964
2020 o-Dichlorobenzene MR 16 SDWIS / OK2002166 / 2968
2020 p-Dichlorobenzene MR 16 SDWIS / OK2002166 / 2969
2020 Vinyl chloride MR 16 SDWIS / OK2002166 / 2976
2020 1,1-Dichloroethylene MR 16 SDWIS / OK2002166 / 2977

How Bernice PWA Compares

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

Metric Bernice PWA Oklahoma avg Federal benchmark
Total violations 464 266.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 24 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 504 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Bernice PWA water safe to drink? ▼
Bernice PWA (PWS ID: OK2002166) has 464 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 504 people using Surface Water sources.
How many people does Bernice PWA serve? ▼
Bernice PWA serves 504 people in Bernice, Oklahoma. It is a Local-owned system using Surface Water water sources with 380 service connections.
What type of violations does Bernice PWA have? ▼
Bernice PWA has 464 total violations: 24 health-based violations (MCL exceedances or treatment failures), 429 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Bernice PWA water? ▼
No PFAS testing data is available for Bernice PWA under the EPA's UCMR5 monitoring program.
What water source does Bernice PWA use? ▼
Bernice PWA 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.