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MCINTOSH CO. RWD #12 (SHELL CREEK)

PWS ID: OK2004919 · HANNA, Oklahoma 74845

MCINTOSH CO. RWD #12 (SHELL CREEK) serves 175 people in HANNA, Oklahoma using Groundwater water sources. It has 128 recorded EPA violations, including 5 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: MCINTOSH CO. RWD #12 (SHELL CREEK)

MCINTOSH CO. RWD #12 (SHELL CREEK) is a local-owned community water system that delivers drinking water to 175 residents in HANNA, Oklahoma (McIntosh County) through 92 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 128 total violations for this system , of which 5 (4%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 107 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 Coliform (TCR), recorded in 18 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. MCINTOSH CO. RWD #12 (SHELL CREEK)'s 128 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
175
Total Violations
128
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
92
County
McIntosh
School/Daycare
No
MCL Violations
3
Monitoring Violations
107
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 18 2015
Lead and Copper Rule MR 17 2023
Gross Alpha, Excl. Radon and U MR 11 2011
Gross Beta Particle Activity MR 11 2011
Combined Radium (-226 and -228) MR 11 2011
Consumer Confidence Rule Other 11 2021
Chlorine MR 10 2025
E. COLI MR 9 2025
TTHM MR 4 2004
Combined Uranium MR 4 2011
Revised Total Coliform Rule MON 4 2022
2,4-D MR 4 2024
Total Haloacetic Acids (HAA5) MR 4 2004
Coliform (TCR) MCL 3 2004
LEAD AND COPPER RULE REVISIONS TT 2 2024
LEAD AND COPPER RULE REVISIONS RPT 2 2024

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 MCINTOSH CO. RWD #12 (SHELL CREEK).

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 OK2004919 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 10 SDWIS / OK2004919 / 0999
2025 E. COLI MR 9 SDWIS / OK2004919 / 3014
2024 2,4-D MR 4 SDWIS / OK2004919 / 2105
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / OK2004919 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / OK2004919 / 5200
2023 Lead and Copper Rule MR 17 SDWIS / OK2004919 / 5000
2022 Revised Total Coliform Rule MON 4 SDWIS / OK2004919 / 8000
2021 Consumer Confidence Rule Other 11 SDWIS / OK2004919 / 7000
2015 Coliform (TCR) MR 18 SDWIS / OK2004919 / 3100
2011 Gross Alpha, Excl. Radon and U MR 11 SDWIS / OK2004919 / 4000
2011 Gross Beta Particle Activity MR 11 SDWIS / OK2004919 / 4100
2011 Combined Radium (-226 and -228) MR 11 SDWIS / OK2004919 / 4010
2011 Combined Uranium MR 4 SDWIS / OK2004919 / 4006
2004 TTHM MR 4 SDWIS / OK2004919 / 2950
2004 Total Haloacetic Acids (HAA5) MR 4 SDWIS / OK2004919 / 2456

How MCINTOSH CO. RWD #12 (SHELL CREEK) Compares

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

Metric MCINTOSH CO. RWD #12 (SHELL CREEK) Oklahoma avg Federal benchmark
Total violations 128 266.8 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 5 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 175 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 MCINTOSH CO. RWD #12 (SHELL CREEK) water safe to drink? ▼
MCINTOSH CO. RWD #12 (SHELL CREEK) (PWS ID: OK2004919) has 128 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 175 people using Groundwater sources.
How many people does MCINTOSH CO. RWD #12 (SHELL CREEK) serve? ▼
MCINTOSH CO. RWD #12 (SHELL CREEK) serves 175 people in HANNA, Oklahoma. It is a Local-owned system using Groundwater water sources with 92 service connections.
What type of violations does MCINTOSH CO. RWD #12 (SHELL CREEK) have? ▼
MCINTOSH CO. RWD #12 (SHELL CREEK) has 128 total violations: 5 health-based violations (MCL exceedances or treatment failures), 107 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in MCINTOSH CO. RWD #12 (SHELL CREEK) water? ▼
No PFAS testing data is available for MCINTOSH CO. RWD #12 (SHELL CREEK) under the EPA's UCMR5 monitoring program.
What water source does MCINTOSH CO. RWD #12 (SHELL CREEK) use? ▼
MCINTOSH CO. RWD #12 (SHELL CREEK) 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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