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HALLETT PUBLIC WORKS AUTHORITY

PWS ID: OK2005905 · HALLETT, Oklahoma 74034

HALLETT PUBLIC WORKS AUTHORITY serves 168 people in HALLETT, Oklahoma using Groundwater water sources. It has 208 recorded EPA violations, including 4 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: HALLETT PUBLIC WORKS AUTHORITY

HALLETT PUBLIC WORKS AUTHORITY is a local-owned community water system that delivers drinking water to 168 residents in HALLETT, Oklahoma (Pawnee County) through 72 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 208 total violations for this system , of which 4 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 172 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 26 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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. HALLETT PUBLIC WORKS AUTHORITY's 208 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
168
Total Violations
208
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
72
County
Pawnee
School/Daycare
No
MCL Violations
3
Monitoring Violations
172
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 26 2008
Lead and Copper Rule MR 11 2009
Nitrate-Nitrite MR 6 2023
Chlorine MR 6 2018
Total Haloacetic Acids (HAA5) MR 4 2004
Consumer Confidence Rule Other 4 2024
Endrin MR 4 2024
BHC-GAMMA MR 4 2024
Methoxychlor MR 4 2024
Glyphosate MR 4 2024
Simazine MR 4 2024
Di(2-ethylhexyl) phthalate MR 4 2024
Picloram MR 4 2024
Atrazine MR 4 2024
2,4-D MR 4 2024
HEXACHLOROBENZENE MR 4 2024
Total Polychlorinated Biphenyls (PCB) MR 4 2024
1,2-DIBROMO-3-CHLOROPROPANE MR 4 2024
Chlordane MR 4 2024
Heptachlor epoxide MR 4 2024
ETHYLENE DIBROMIDE MR 4 2024
Pentachlorophenol MR 4 2024
Toxaphene MR 4 2024
Dalapon MR 4 2024
Dinoseb MR 4 2024
OXAMYL MR 4 2024
Di(2-ethylhexyl) adipate MR 4 2024
2,4,5-TP MR 4 2024
LASSO MR 4 2024
Heptachlor MR 4 2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
4:2 FTS 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 4/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 4/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 4/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 4/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 4/16/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 4/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 4/16/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 4/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 4/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 4/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 4/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 4/16/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 4/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 4/16/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 4/16/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 4/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 4/16/2025 <0.006 µg/L 0.006 µg/L Not Detected
ADONA 4/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 4/16/2025 <9 µg/L 9 µg/L Not Detected
9Cl-PF3ONS 10/13/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFTrDA 10/13/2025 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 10/13/2025 <0.006 µg/L 0.006 µg/L Not Detected
lithium 10/13/2025 <9 µg/L 9 µg/L Not Detected
PFBS 10/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 10/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 10/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 10/13/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 10/13/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 10/13/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 10/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 10/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 10/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 10/13/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 10/13/2025 <0.008 µg/L 0.008 µg/L Not Detected
ADONA 10/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 10/13/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 10/13/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 10/13/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 10/13/2025 <0.003 µg/L 0.003 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 HALLETT PUBLIC WORKS AUTHORITY.

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 OK2005905 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 Consumer Confidence Rule Other 4 SDWIS / OK2005905 / 7000
2024 Endrin MR 4 SDWIS / OK2005905 / 2005
2024 BHC-GAMMA MR 4 SDWIS / OK2005905 / 2010
2024 Methoxychlor MR 4 SDWIS / OK2005905 / 2015
2024 Glyphosate MR 4 SDWIS / OK2005905 / 2034
2024 Simazine MR 4 SDWIS / OK2005905 / 2037
2024 Di(2-ethylhexyl) phthalate MR 4 SDWIS / OK2005905 / 2039
2024 Picloram MR 4 SDWIS / OK2005905 / 2040
2024 Atrazine MR 4 SDWIS / OK2005905 / 2050
2024 2,4-D MR 4 SDWIS / OK2005905 / 2105
2024 HEXACHLOROBENZENE MR 4 SDWIS / OK2005905 / 2274
2024 Total Polychlorinated Biphenyls (PCB) MR 4 SDWIS / OK2005905 / 2383
2024 1,2-DIBROMO-3-CHLOROPROPANE MR 4 SDWIS / OK2005905 / 2931
2024 Chlordane MR 4 SDWIS / OK2005905 / 2959
2024 Heptachlor epoxide MR 4 SDWIS / OK2005905 / 2067

How HALLETT PUBLIC WORKS AUTHORITY Compares

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

Metric HALLETT PUBLIC WORKS AUTHORITY Oklahoma avg Federal benchmark
Total violations 208 266.8 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 168 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 HALLETT PUBLIC WORKS AUTHORITY water safe to drink? ▼
HALLETT PUBLIC WORKS AUTHORITY (PWS ID: OK2005905) has 208 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 168 people using Groundwater sources.
How many people does HALLETT PUBLIC WORKS AUTHORITY serve? ▼
HALLETT PUBLIC WORKS AUTHORITY serves 168 people in HALLETT, Oklahoma. It is a Local-owned system using Groundwater water sources with 72 service connections.
What type of violations does HALLETT PUBLIC WORKS AUTHORITY have? ▼
HALLETT PUBLIC WORKS AUTHORITY has 208 total violations: 4 health-based violations (MCL exceedances or treatment failures), 172 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in HALLETT PUBLIC WORKS AUTHORITY water? ▼
No. HALLETT PUBLIC WORKS AUTHORITY was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does HALLETT PUBLIC WORKS AUTHORITY use? ▼
HALLETT PUBLIC WORKS AUTHORITY 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. 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 PlainWater Editorial