PlainWater
States → Oklahoma

Community Water System · PWS OK1021305

Avant Utilities Authority

Avant, Oklahoma 74001 - drinking water served from surface water sources to 361 people, tracked in EPA SDWIS and UCMR5.

361
People served
831
EPA violations
517
Health-based
Untested
UCMR5 result

The verdict

EPA records 831 drinking-water violations at Avant Utilities Authority, 62% of them health-based - above the Oklahoma per-system average.

831
Total EPA violations on record
62%
Health-based (MCL / treatment failure)
361
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Avant Utilities Authority

Avant Utilities Authority is a local-owned community water system that delivers drinking water to 361 residents in Avant, Oklahoma (Osage County) through 165 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 831 total violations for this system , of which 517 (62%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 239 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 264 violations (MCL, health-based). 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. Statewide, 101 of 166 UCMR5-tested systems have reported PFAS detections (60.8%).

Avant Utilities Authority's 831 violations sit above the Oklahoma average.

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
361
Total Violations
831
Health-Based Violations
517
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
165
County
Osage
School/Daycare
No
MCL Violations
491
Monitoring Violations
239
Treatment Tech Violations
26

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 264 2025
Total Haloacetic Acids (HAA5) MCL 227 2025
Surface Water Treatment Rule MR 71 2025
Total Haloacetic Acids (HAA5) MR 47 2025
TTHM MR 47 2025
Coliform (TCR) MR 34 2012
Surface Water Treatment Rule TT 25 2021
Lead and Copper Rule MR 21 2017
Nitrate-Nitrite MR 12 2008
Consumer Confidence Rule Other 10 2025
Arsenic MR 5 2007
Nitrate MR 2 2001
LEAD AND COPPER RULE REVISIONS TT 1 2024
LEAD AND COPPER RULE REVISIONS RPT 1 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 Avant Utilities 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 OK1021305 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 264 SDWIS / OK1021305 / 2950
2025 Total Haloacetic Acids (HAA5) MCL 227 SDWIS / OK1021305 / 2456
2025 Surface Water Treatment Rule MR 71 SDWIS / OK1021305 / 0200
2025 Total Haloacetic Acids (HAA5) MR 47 SDWIS / OK1021305 / 2456
2025 TTHM MR 47 SDWIS / OK1021305 / 2950
2025 Consumer Confidence Rule Other 10 SDWIS / OK1021305 / 7000
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / OK1021305 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / OK1021305 / 5200
2021 Surface Water Treatment Rule TT 25 SDWIS / OK1021305 / 0200
2017 Lead and Copper Rule MR 21 SDWIS / OK1021305 / 5000
2012 Coliform (TCR) MR 34 SDWIS / OK1021305 / 3100
2008 Nitrate-Nitrite MR 12 SDWIS / OK1021305 / 1038
2007 Arsenic MR 5 SDWIS / OK1021305 / 1005
2001 Nitrate MR 2 SDWIS / OK1021305 / 1040

How Avant Utilities Authority Compares

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

Metric Avant Utilities Authority Oklahoma avg Federal benchmark
Total violations 831 266.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 517 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 361 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Avant Utilities Authority water safe to drink? ▼
Avant Utilities Authority (PWS ID: OK1021305) has 831 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 361 people using Surface Water sources.
How many people does Avant Utilities Authority serve? ▼
Avant Utilities Authority serves 361 people in Avant, Oklahoma. It is a Local-owned system using Surface Water water sources with 165 service connections.
What type of violations does Avant Utilities Authority have? ▼
Avant Utilities Authority has 831 total violations: 517 health-based violations (MCL exceedances or treatment failures), 239 monitoring/reporting violations, and 26 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Avant Utilities Authority water? ▼
No PFAS testing data is available for Avant Utilities Authority under the EPA's UCMR5 monitoring program.
What water source does Avant Utilities Authority use? ▼
Avant Utilities Authority 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.
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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.