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Community Water System · PWS MO1010510

Maysville PWS

Maysville, Missouri 64469-0000 - drinking water served from surface water sources to 1,096 people, tracked in EPA SDWIS and UCMR5.

1,096
People served
555
EPA violations
506
Health-based
Untested
UCMR5 result

The verdict

EPA records 555 drinking-water violations at Maysville PWS, 91% of them health-based - above the Missouri per-system average.

555
Total EPA violations on record
91%
Health-based (MCL / treatment failure)
1,096
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Maysville PWS

Maysville PWS is a local-owned community water system that delivers drinking water to 1,096 residents in Maysville, Missouri (DeKalb County) through 461 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 555 total violations for this system , of which 506 (91%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 38 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 193 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%).

Maysville PWS's 555 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
1,096
Total Violations
555
Health-Based Violations
506
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
461
County
DeKalb
School/Daycare
No
MCL Violations
260
Monitoring Violations
38
Treatment Tech Violations
241

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 193 2025
Interim Enhanced Surface Water Treatment Rule TT 171 2024
Total Haloacetic Acids (HAA5) MCL 47 2025
CARBON, TOTAL TT 37 2014
Surface Water Treatment Rule TT 33 2024
Coliform (TCR) MCL 16 2010
Coliform (TCR) MR 12 2002
Interim Enhanced Surface Water Treatment Rule MR 8 2025
Chlorite MR 5 2004
Chlorine dioxide MRDL 5 2009
Surface Water Treatment Rule MR 5 2025
Revised Total Coliform Rule MON 4 2024
Chlorite MCL 4 2022
CARBON, TOTAL MR 4 2008
Public Notice Other 2 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 Maysville 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 MO1010510 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 Maysville 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 TTHM MCL 193 SDWIS / MO1010510 / 2950
2025 Total Haloacetic Acids (HAA5) MCL 47 SDWIS / MO1010510 / 2456
2025 Interim Enhanced Surface Water Treatment Rule MR 8 SDWIS / MO1010510 / 0300
2025 Surface Water Treatment Rule MR 5 SDWIS / MO1010510 / 0200
2024 Interim Enhanced Surface Water Treatment Rule TT 171 SDWIS / MO1010510 / 0300
2024 Surface Water Treatment Rule TT 33 SDWIS / MO1010510 / 0200
2024 Revised Total Coliform Rule MON 4 SDWIS / MO1010510 / 8000
2022 Chlorite MCL 4 SDWIS / MO1010510 / 1009
2014 CARBON, TOTAL TT 37 SDWIS / MO1010510 / 2920
2013 Public Notice Other 2 SDWIS / MO1010510 / 7500
2010 Coliform (TCR) MCL 16 SDWIS / MO1010510 / 3100
2009 Chlorine dioxide MRDL 5 SDWIS / MO1010510 / 1008
2008 CARBON, TOTAL MR 4 SDWIS / MO1010510 / 2920
2004 Chlorite MR 5 SDWIS / MO1010510 / 1009
2002 Coliform (TCR) MR 12 SDWIS / MO1010510 / 3100

How Maysville PWS Compares

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

Metric Maysville PWS Missouri avg Federal benchmark
Total violations 555 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 506 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 1,096 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 Maysville PWS water safe to drink? ▼
Maysville PWS (PWS ID: MO1010510) has 555 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,096 people using Surface Water sources.
How many people does Maysville PWS serve? ▼
Maysville PWS serves 1,096 people in Maysville, Missouri. It is a Local-owned system using Surface Water water sources with 461 service connections.
What type of violations does Maysville PWS have? ▼
Maysville PWS has 555 total violations: 506 health-based violations (MCL exceedances or treatment failures), 38 monitoring/reporting violations, and 241 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Maysville PWS water? ▼
No PFAS testing data is available for Maysville PWS under the EPA's UCMR5 monitoring program.
What water source does Maysville PWS use? ▼
Maysville PWS 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.