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CHECOTAH PWA

PWS ID: OK1020515 · CHECOTAH, Oklahoma 74426

CHECOTAH PWA serves 3,481 people in CHECOTAH, Oklahoma using Surface Water water sources. It has 633 recorded EPA violations, including 579 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: CHECOTAH PWA

CHECOTAH PWA is a local-owned community water system that delivers drinking water to 3,481 residents in CHECOTAH, Oklahoma (McIntosh County) through 1,471 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 633 total violations for this system , of which 579 (91%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 30 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 TTHM, recorded in 316 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 0.0055 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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. CHECOTAH PWA's 633 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.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
3,481
Total Violations
633
Health-Based Violations
579
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
1,471
County
McIntosh
School/Daycare
No
MCL Violations
449
Monitoring Violations
30
Treatment Tech Violations
130

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 316 2025
Total Haloacetic Acids (HAA5) MCL 118 2009
CARBON, TOTAL TT 105 2009
CARBON, TOTAL MR 17 2025
Interim Enhanced Surface Water Treatment Rule TT 16 2015
Coliform (TCR) MCL 15 2013
Surface Water Treatment Rule TT 9 2018
Chlorine MR 4 2020
Revised Total Coliform Rule MON 4 2020
Chlorite MR 3 2024
Coliform (TCR) MR 2 1999
Consumer Confidence Rule Other 1 2025

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 1 of 70 samples detected PFAS.

Contaminant Date Result MRL Status
lithium 7/7/2025 <9 µg/L 9 µg/L Not Detected
PFTA 7/7/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 7/7/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 7/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/7/2025 <0.006 µg/L 0.006 µg/L Not Detected
HFPO-DA 7/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/15/2025 0.0055 µg/L 0.005 µg/L Detected
6:2 FTS 7/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 7/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 7/15/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 7/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 7/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 7/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 7/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 7/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
9Cl-PF3ONS 7/15/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFPeA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 7/15/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 5/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 5/7/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 5/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 5/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 5/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 5/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/7/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFHxS 5/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 5/7/2025 <0.002 µg/L 0.002 µg/L Not Detected
8:2 FTS 5/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 5/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 5/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 5/7/2025 <0.004 µg/L 0.004 µg/L Not Detected

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 CHECOTAH 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 OK1020515 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 TTHM MCL 316 SDWIS / OK1020515 / 2950
2025 CARBON, TOTAL MR 17 SDWIS / OK1020515 / 2920
2025 Consumer Confidence Rule Other 1 SDWIS / OK1020515 / 7000
2024 Chlorite MR 3 SDWIS / OK1020515 / 1009
2020 Chlorine MR 4 SDWIS / OK1020515 / 0999
2020 Revised Total Coliform Rule MON 4 SDWIS / OK1020515 / 8000
2018 Surface Water Treatment Rule TT 9 SDWIS / OK1020515 / 0200
2015 Interim Enhanced Surface Water Treatment Rule TT 16 SDWIS / OK1020515 / 0300
2013 Coliform (TCR) MCL 15 SDWIS / OK1020515 / 3100
2009 Total Haloacetic Acids (HAA5) MCL 118 SDWIS / OK1020515 / 2456
2009 CARBON, TOTAL TT 105 SDWIS / OK1020515 / 2920
1999 Coliform (TCR) MR 2 SDWIS / OK1020515 / 3100

How CHECOTAH PWA Compares

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

Metric CHECOTAH PWA Oklahoma avg Federal benchmark
Total violations 633 266.8 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 579 90.2 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 60.8% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 3,481 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 CHECOTAH PWA water safe to drink? ▼
CHECOTAH PWA (PWS ID: OK1020515) has 633 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 3,481 people using Surface Water sources.
How many people does CHECOTAH PWA serve? ▼
CHECOTAH PWA serves 3,481 people in CHECOTAH, Oklahoma. It is a Local-owned system using Surface Water water sources with 1,471 service connections.
What type of violations does CHECOTAH PWA have? ▼
CHECOTAH PWA has 633 total violations: 579 health-based violations (MCL exceedances or treatment failures), 30 monitoring/reporting violations, and 130 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CHECOTAH PWA water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in CHECOTAH PWA's water supply: PFBA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does CHECOTAH PWA use? ▼
CHECOTAH 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.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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

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