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Community Water System · PWS OK2005708

Wynona

Wynona, Oklahoma 74084 - drinking water served from groundwater sources to 450 people, tracked in EPA SDWIS and UCMR5.

450
People served
166
EPA violations
8
Health-based
Untested
UCMR5 result

The verdict

EPA records 166 drinking-water violations at Wynona, 5% of them health-based - below the Oklahoma per-system average.

166
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
450
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Wynona

Wynona is a local-owned community water system that delivers drinking water to 450 residents in Wynona, Oklahoma (Osage County) through 274 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 166 total violations for this system , of which 8 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 117 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 Chlorine, recorded in 16 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%).

Wynona's 166 violations sit below 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
450
Total Violations
166
Health-Based Violations
8
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
274
County
Osage
School/Daycare
No
MCL Violations
8
Monitoring Violations
117
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 16 2024
Coliform (TCR) MR 8 1999
Coliform (TCR) MCL 8 2012
Nitrate-Nitrite MR 8 2022
Lead and Copper Rule MR 5 2009
Total Haloacetic Acids (HAA5) MR 5 2009
TTHM MR 5 2009
E. COLI MR 4 2022
Revised Total Coliform Rule MON 4 2024
1,2,4-Trichlorobenzene MR 3 2002
cis-1,2-Dichloroethylene MR 3 2002
o-Dichlorobenzene MR 3 2002
1,1-Dichloroethylene MR 3 2002
trans-1,2-Dichloroethylene MR 3 2002
Carbon tetrachloride MR 3 2002
1,1,2-Trichloroethane MR 3 2002
Benzene MR 3 2002
Toluene MR 3 2002
Ethylbenzene MR 3 2002
Styrene MR 3 2002
Xylenes, Total MR 3 2002
Trichloroethylene MR 3 2002
p-Dichlorobenzene MR 3 2002
DICHLOROMETHANE MR 3 2002
1,1,1-Trichloroethane MR 3 2002
Vinyl chloride MR 3 2002
Tetrachloroethylene MR 3 2002
1,2-Dichloropropane MR 3 2002
CHLOROBENZENE MR 3 2002
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 2 2010

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 Wynona.

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 OK2005708 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 Chlorine MR 16 SDWIS / OK2005708 / 0999
2024 Revised Total Coliform Rule MON 4 SDWIS / OK2005708 / 8000
2022 Nitrate-Nitrite MR 8 SDWIS / OK2005708 / 1038
2022 E. COLI MR 4 SDWIS / OK2005708 / 3014
2016 Consumer Confidence Rule Other 2 SDWIS / OK2005708 / 7000
2012 Coliform (TCR) MCL 8 SDWIS / OK2005708 / 3100
2010 Stage 2 Disinfectants and Disinfection Byproducts Rule MR 2 SDWIS / OK2005708 / 0600
2009 Lead and Copper Rule MR 5 SDWIS / OK2005708 / 5000
2009 Total Haloacetic Acids (HAA5) MR 5 SDWIS / OK2005708 / 2456
2009 TTHM MR 5 SDWIS / OK2005708 / 2950
2002 1,2,4-Trichlorobenzene MR 3 SDWIS / OK2005708 / 2378
2002 cis-1,2-Dichloroethylene MR 3 SDWIS / OK2005708 / 2380
2002 o-Dichlorobenzene MR 3 SDWIS / OK2005708 / 2968
2002 1,1-Dichloroethylene MR 3 SDWIS / OK2005708 / 2977
2002 trans-1,2-Dichloroethylene MR 3 SDWIS / OK2005708 / 2979

How Wynona Compares

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

Metric Wynona Oklahoma avg Federal benchmark
Total violations 166 266.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 8 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 450 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 Wynona water safe to drink? ▼
Wynona (PWS ID: OK2005708) has 166 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 450 people using Groundwater sources.
How many people does Wynona serve? ▼
Wynona serves 450 people in Wynona, Oklahoma. It is a Local-owned system using Groundwater water sources with 274 service connections.
What type of violations does Wynona have? ▼
Wynona has 166 total violations: 8 health-based violations (MCL exceedances or treatment failures), 117 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Wynona water? ▼
No PFAS testing data is available for Wynona under the EPA's UCMR5 monitoring program.
What water source does Wynona use? ▼
Wynona uses Groundwater 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.