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DELAWARE CO RWD # 12

PWS ID: OK2002170 · JAY, Oklahoma 74346

DELAWARE CO RWD # 12 serves 785 people in JAY, Oklahoma using Groundwater water sources. It has 72 recorded EPA violations, including 4 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: DELAWARE CO RWD # 12

DELAWARE CO RWD # 12 is a private-owned community water system that delivers drinking water to 785 residents in JAY, Oklahoma (Delaware County) through 434 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 72 total violations for this system , of which 4 (6%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 65 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 Coliform (TCR), recorded in 17 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. DELAWARE CO RWD # 12's 72 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
785
Total Violations
72
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
434
County
Delaware
School/Daycare
No
MCL Violations
3
Monitoring Violations
65
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 17 2013
Lead and Copper Rule MR 6 2024
Fluoride MCL 3 1979
1,2,4-Trichlorobenzene MR 2 2002
cis-1,2-Dichloroethylene MR 2 2002
Xylenes, Total MR 2 2002
DICHLOROMETHANE MR 2 2002
Vinyl chloride MR 2 2002
1,1-Dichloroethylene MR 2 2002
trans-1,2-Dichloroethylene MR 2 2002
1,1,1-Trichloroethane MR 2 2002
Carbon tetrachloride MR 2 2002
1,2-Dichloropropane MR 2 2002
Trichloroethylene MR 2 2002
Tetrachloroethylene MR 2 2002
Benzene MR 2 2002
Ethylbenzene MR 2 2002
E. COLI MR 2 2013
p-Dichlorobenzene MR 2 2002
o-Dichlorobenzene MR 2 2002
Toluene MR 2 2002
CHLOROBENZENE MR 2 2002
Styrene MR 2 2002
1,1,2-Trichloroethane MR 2 2002
LEAD AND COPPER RULE REVISIONS TT 1 2024
LEAD AND COPPER RULE REVISIONS RPT 1 2024
Consumer Confidence Rule Other 1 2012

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 DELAWARE CO RWD # 12.

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 OK2002170 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 Lead and Copper Rule MR 6 SDWIS / OK2002170 / 5000
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / OK2002170 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / OK2002170 / 5200
2013 Coliform (TCR) MR 17 SDWIS / OK2002170 / 3100
2013 E. COLI MR 2 SDWIS / OK2002170 / 3014
2012 Consumer Confidence Rule Other 1 SDWIS / OK2002170 / 7000
2002 1,2,4-Trichlorobenzene MR 2 SDWIS / OK2002170 / 2378
2002 cis-1,2-Dichloroethylene MR 2 SDWIS / OK2002170 / 2380
2002 Xylenes, Total MR 2 SDWIS / OK2002170 / 2955
2002 DICHLOROMETHANE MR 2 SDWIS / OK2002170 / 2964
2002 Vinyl chloride MR 2 SDWIS / OK2002170 / 2976
2002 1,1-Dichloroethylene MR 2 SDWIS / OK2002170 / 2977
2002 trans-1,2-Dichloroethylene MR 2 SDWIS / OK2002170 / 2979
2002 1,1,1-Trichloroethane MR 2 SDWIS / OK2002170 / 2981
2002 Carbon tetrachloride MR 2 SDWIS / OK2002170 / 2982

How DELAWARE CO RWD # 12 Compares

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

Metric DELAWARE CO RWD # 12 Oklahoma avg Federal benchmark
Total violations 72 266.8 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 4 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 785 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 DELAWARE CO RWD # 12 water safe to drink? ▼
DELAWARE CO RWD # 12 (PWS ID: OK2002170) has 72 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 785 people using Groundwater sources.
How many people does DELAWARE CO RWD # 12 serve? ▼
DELAWARE CO RWD # 12 serves 785 people in JAY, Oklahoma. It is a Private-owned system using Groundwater water sources with 434 service connections.
What type of violations does DELAWARE CO RWD # 12 have? ▼
DELAWARE CO RWD # 12 has 72 total violations: 4 health-based violations (MCL exceedances or treatment failures), 65 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in DELAWARE CO RWD # 12 water? ▼
No PFAS testing data is available for DELAWARE CO RWD # 12 under the EPA's UCMR5 monitoring program.
What water source does DELAWARE CO RWD # 12 use? ▼
DELAWARE CO RWD # 12 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.

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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.

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