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Community Water System · PWS MO6010521

Middletown PWS

Middletown, Missouri 63359-0000 - drinking water served from groundwater sources to 167 people, tracked in EPA SDWIS and UCMR5.

167
People served
270
EPA violations
248
Health-based
Untested
UCMR5 result

The verdict

EPA records 270 drinking-water violations at Middletown PWS, 92% of them health-based - above the Missouri per-system average.

270
Total EPA violations on record
92%
Health-based (MCL / treatment failure)
167
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Middletown PWS

Middletown PWS is a local-owned community water system that delivers drinking water to 167 residents in Middletown, Missouri (Montgomery County) through 100 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 270 total violations for this system , of which 248 (92%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 4 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 Combined Radium (-226 and -228), recorded in 92 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, 71 of 230 UCMR5-tested systems have reported PFAS detections (30.9%).

Middletown PWS's 270 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
167
Total Violations
270
Health-Based Violations
248
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
100
County
Montgomery
School/Daycare
No
MCL Violations
238
Monitoring Violations
4
Treatment Tech Violations
10

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 92 2009
Gross Alpha, Excl. Radon and U MCL 84 2009
Coliform (TCR) MCL 62 2011
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 5 2022
Groundwater Rule TT 5 2021
LEAD AND COPPER RULE REVISIONS RPT 4 2024
Consumer Confidence Rule Other 2 2021
Gross Alpha, Excl. Radon and U MR 2 1993
Lead and Copper Rule MR 2 1996
Groundwater Rule Other 1 2021
Public Notice Other 1 2022

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 Middletown 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 MO6010521 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 Middletown 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
2024 LEAD AND COPPER RULE REVISIONS RPT 4 SDWIS / MO6010521 / 5200
2022 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 5 SDWIS / MO6010521 / 0400
2022 Public Notice Other 1 SDWIS / MO6010521 / 7500
2021 Groundwater Rule TT 5 SDWIS / MO6010521 / 0700
2021 Consumer Confidence Rule Other 2 SDWIS / MO6010521 / 7000
2021 Groundwater Rule Other 1 SDWIS / MO6010521 / 0700
2011 Coliform (TCR) MCL 62 SDWIS / MO6010521 / 3100
2009 Combined Radium (-226 and -228) MCL 92 SDWIS / MO6010521 / 4010
2009 Gross Alpha, Excl. Radon and U MCL 84 SDWIS / MO6010521 / 4000
1996 Lead and Copper Rule MR 2 SDWIS / MO6010521 / 5000
1993 Gross Alpha, Excl. Radon and U MR 2 SDWIS / MO6010521 / 4000

How Middletown PWS Compares

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

Metric Middletown PWS Missouri avg Federal benchmark
Total violations 270 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 248 19.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 30.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 167 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 Middletown PWS water safe to drink? ▼
Middletown PWS (PWS ID: MO6010521) has 270 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 167 people using Groundwater sources.
How many people does Middletown PWS serve? ▼
Middletown PWS serves 167 people in Middletown, Missouri. It is a Local-owned system using Groundwater water sources with 100 service connections.
What type of violations does Middletown PWS have? ▼
Middletown PWS has 270 total violations: 248 health-based violations (MCL exceedances or treatment failures), 4 monitoring/reporting violations, and 10 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Middletown PWS water? ▼
No PFAS testing data is available for Middletown PWS under the EPA's UCMR5 monitoring program.
What water source does Middletown PWS use? ▼
Middletown 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.