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Community Water System · PWS MO4010456

Leadwood PWS

Leadwood, Missouri 63653-0000 - drinking water served from groundwater sources to 1,192 people, tracked in EPA SDWIS and UCMR5.

1,192
People served
269
EPA violations
191
Health-based
Untested
UCMR5 result

The verdict

EPA records 269 drinking-water violations at Leadwood PWS, 71% of them health-based - above the Missouri per-system average.

269
Total EPA violations on record
71%
Health-based (MCL / treatment failure)
1,192
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Leadwood PWS

Leadwood PWS is a local-owned community water system that delivers drinking water to 1,192 residents in Leadwood, Missouri (St. Francois County) through 437 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 269 total violations for this system , of which 191 (71%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 65 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 Combined Radium (-226 and -228), recorded in 118 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 Missouri, EPA tracks 2,823 public water systems serving 5,855,885 people, with 201,695 cumulative violations and 54,821 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 71.4 violations. Statewide, 162 of 230 UCMR5-tested systems have reported PFAS detections (70.4%).

Leadwood PWS's 269 violations sit above the Missouri 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
1,192
Total Violations
269
Health-Based Violations
191
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
437
County
St. Francois
School/Daycare
No
MCL Violations
191
Monitoring Violations
65
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 118 2024
Gross Alpha, Excl. Radon and U MCL 73 2018
Groundwater Rule MR 18 2025
Gross Alpha, Excl. Radon and U MR 12 2005
Coliform (TCR) MR 10 1997
Combined Radium (-226 and -228) MR 8 2005
Combined Uranium MR 5 2012
Radium-226 MR 5 2012
Radium-228 MR 5 2012
Consumer Confidence Rule Other 3 2013
Lead and Copper Rule MR 2 2004
Public Notice Other 1 2013

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 Leadwood PWS.

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 MO4010456 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Missouri Drinking Water Authority

Missouri DNR, Public Drinking Water Branch is the primacy agency that licenses and inspects Leadwood PWS under EPA-delegated authority.

Open MO regulator portal

Source: Missouri DNR, Public Drinking Water Branch

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 Groundwater Rule MR 18 SDWIS / MO4010456 / 0700
2024 Combined Radium (-226 and -228) MCL 118 SDWIS / MO4010456 / 4010
2018 Gross Alpha, Excl. Radon and U MCL 73 SDWIS / MO4010456 / 4000
2013 Consumer Confidence Rule Other 3 SDWIS / MO4010456 / 7000
2013 Public Notice Other 1 SDWIS / MO4010456 / 7500
2012 Combined Uranium MR 5 SDWIS / MO4010456 / 4006
2012 Radium-226 MR 5 SDWIS / MO4010456 / 4020
2012 Radium-228 MR 5 SDWIS / MO4010456 / 4030
2005 Gross Alpha, Excl. Radon and U MR 12 SDWIS / MO4010456 / 4000
2005 Combined Radium (-226 and -228) MR 8 SDWIS / MO4010456 / 4010
2004 Lead and Copper Rule MR 2 SDWIS / MO4010456 / 5000
1997 Coliform (TCR) MR 10 SDWIS / MO4010456 / 3100

How Leadwood PWS Compares

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

Metric Leadwood PWS Missouri avg Federal benchmark
Total violations 269 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 191 19.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 70.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,192 2,074 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,823 regulated public water systems in Missouri.

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 Leadwood PWS water safe to drink? ▼
Leadwood PWS (PWS ID: MO4010456) has 269 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,192 people using Groundwater sources.
How many people does Leadwood PWS serve? ▼
Leadwood PWS serves 1,192 people in Leadwood, Missouri. It is a Local-owned system using Groundwater water sources with 437 service connections.
What type of violations does Leadwood PWS have? ▼
Leadwood PWS has 269 total violations: 191 health-based violations (MCL exceedances or treatment failures), 65 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Leadwood PWS water? ▼
No PFAS testing data is available for Leadwood PWS under the EPA's UCMR5 monitoring program.
What water source does Leadwood PWS use? ▼
Leadwood PWS 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.
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.