PlainWater

JENNINGS

PWS ID: OK2005904 · JENNINGS, Oklahoma 74038

JENNINGS serves 400 people in JENNINGS, Oklahoma using Groundwater water sources. It has 1,348 recorded EPA violations, including 8 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: JENNINGS

JENNINGS is a local-owned community water system that delivers drinking water to 400 residents in JENNINGS, Oklahoma (Pawnee County) through 170 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 1,348 total violations for this system , of which 8 (1%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 1,294 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 1,2,4-Trichlorobenzene, recorded in 44 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. JENNINGS's 1,348 violations sit above 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
400
Total Violations
1,348
Health-Based Violations
8
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
170
County
Pawnee
School/Daycare
No
MCL Violations
7
Monitoring Violations
1,294
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 44 2014
Vinyl chloride MR 44 2014
1,1-Dichloroethylene MR 44 2014
1,1,1-Trichloroethane MR 44 2014
Carbon tetrachloride MR 44 2014
1,2-Dichloropropane MR 44 2014
1,1,2-Trichloroethane MR 44 2014
Tetrachloroethylene MR 44 2014
CHLOROBENZENE MR 44 2014
Benzene MR 44 2014
Ethylbenzene MR 44 2014
Styrene MR 44 2014
o-Dichlorobenzene MR 44 2014
trans-1,2-Dichloroethylene MR 44 2014
Toluene MR 44 2014
DICHLOROMETHANE MR 44 2014
p-Dichlorobenzene MR 44 2014
Trichloroethylene MR 44 2014
cis-1,2-Dichloroethylene MR 44 2014
Xylenes, Total MR 44 2014
1,2-Dichloroethane MR 38 2014
Nitrate-Nitrite MR 22 2024
Consumer Confidence Rule Other 21 2025
Coliform (TCR) MR 20 2012
Lead and Copper Rule MR 18 2023
Chlorine MR 12 2019
BHC-GAMMA MR 10 2025
Methoxychlor MR 10 2025
Toxaphene MR 10 2025
Dalapon MR 10 2025

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 JENNINGS.

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 OK2005904 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 Consumer Confidence Rule Other 21 SDWIS / OK2005904 / 7000
2025 BHC-GAMMA MR 10 SDWIS / OK2005904 / 2010
2025 Methoxychlor MR 10 SDWIS / OK2005904 / 2015
2025 Toxaphene MR 10 SDWIS / OK2005904 / 2020
2025 Dalapon MR 10 SDWIS / OK2005904 / 2031
2025 Di(2-ethylhexyl) adipate MR 10 SDWIS / OK2005904 / 2035
2025 OXAMYL MR 10 SDWIS / OK2005904 / 2036
2025 Simazine MR 10 SDWIS / OK2005904 / 2037
2025 Picloram MR 10 SDWIS / OK2005904 / 2040
2025 Dinoseb MR 10 SDWIS / OK2005904 / 2041
2025 Atrazine MR 10 SDWIS / OK2005904 / 2050
2025 LASSO MR 10 SDWIS / OK2005904 / 2051
2025 Heptachlor epoxide MR 10 SDWIS / OK2005904 / 2067
2025 2,4,5-TP MR 10 SDWIS / OK2005904 / 2110
2025 HEXACHLOROBENZENE MR 10 SDWIS / OK2005904 / 2274

How JENNINGS Compares

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

Metric JENNINGS Oklahoma avg Federal benchmark
Total violations 1,348 266.8 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 400 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 JENNINGS water safe to drink?
JENNINGS (PWS ID: OK2005904) has 1348 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 400 people using Groundwater sources.
How many people does JENNINGS serve?
JENNINGS serves 400 people in JENNINGS, Oklahoma. It is a Local-owned system using Groundwater water sources with 170 service connections.
What type of violations does JENNINGS have?
JENNINGS has 1,348 total violations: 8 health-based violations (MCL exceedances or treatment failures), 1,294 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in JENNINGS water?
No PFAS testing data is available for JENNINGS under the EPA's UCMR5 monitoring program.
What water source does JENNINGS use?
JENNINGS 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.

Explore PlainWater

Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Related

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