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Community Water System · PWS OK1020605

US Army Ammunition Plant

McAlester, Oklahoma 74501-9002 - drinking water served from surface water sources to 1,872 people, tracked in EPA SDWIS and UCMR5.

1,872
People served
96
EPA violations
49
Health-based
Untested
UCMR5 result

The verdict

EPA records 96 drinking-water violations at US Army Ammunition Plant, 51% of them health-based - below the Oklahoma per-system average.

96
Total EPA violations on record
51%
Health-based (MCL / treatment failure)
1,872
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: US Army Ammunition Plant

US Army Ammunition Plant is a federal-owned community water system that delivers drinking water to 1,872 residents in McAlester, Oklahoma (Pittsburg County) through 298 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 96 total violations for this system , of which 49 (51%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 35 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 TTHM, recorded in 45 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%).

US Army Ammunition Plant's 96 violations sit below 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
1,872
Total Violations
96
Health-Based Violations
49
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Federal
Connections
298
County
Pittsburg
School/Daycare
No
MCL Violations
45
Monitoring Violations
35
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 45 2022
Coliform (TCR) MR 15 2010
CARBON, TOTAL MR 10 2011
Surface Water Treatment Rule TT 4 1999
Glyphosate MR 3 2024
Revised Total Coliform Rule MON 3 2024
Surface Water Treatment Rule MR 2 1999
Atrazine MR 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 US Army Ammunition Plant.

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 OK1020605 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 Glyphosate MR 3 SDWIS / OK1020605 / 2034
2024 Revised Total Coliform Rule MON 3 SDWIS / OK1020605 / 8000
2024 Atrazine MR 2 SDWIS / OK1020605 / 2050
2022 TTHM MCL 45 SDWIS / OK1020605 / 2950
2011 CARBON, TOTAL MR 10 SDWIS / OK1020605 / 2920
2010 Coliform (TCR) MR 15 SDWIS / OK1020605 / 3100
1999 Surface Water Treatment Rule TT 4 SDWIS / OK1020605 / 0200
1999 Surface Water Treatment Rule MR 2 SDWIS / OK1020605 / 0200

How US Army Ammunition Plant Compares

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

Metric US Army Ammunition Plant Oklahoma avg Federal benchmark
Total violations 96 266.8 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 49 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 1,872 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 US Army Ammunition Plant water safe to drink? ▼
US Army Ammunition Plant (PWS ID: OK1020605) has 96 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,872 people using Surface Water sources.
How many people does US Army Ammunition Plant serve? ▼
US Army Ammunition Plant serves 1,872 people in McAlester, Oklahoma. It is a Federal-owned system using Surface Water water sources with 298 service connections.
What type of violations does US Army Ammunition Plant have? ▼
US Army Ammunition Plant has 96 total violations: 49 health-based violations (MCL exceedances or treatment failures), 35 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in US Army Ammunition Plant water? ▼
No PFAS testing data is available for US Army Ammunition Plant under the EPA's UCMR5 monitoring program.
What water source does US Army Ammunition Plant use? ▼
US Army Ammunition Plant 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.