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Community Water System · PWS MO6010848

Wellsville PWS

Wellsville, Missouri 63384-0000 - drinking water served from surface water sources to 1,210 people, tracked in EPA SDWIS and UCMR5.

1,210
People served
651
EPA violations
553
Health-based
Untested
UCMR5 result

The verdict

EPA records 651 drinking-water violations at Wellsville PWS, 85% of them health-based - above the Missouri per-system average.

651
Total EPA violations on record
85%
Health-based (MCL / treatment failure)
1,210
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Wellsville PWS

Wellsville PWS is a local-owned community water system that delivers drinking water to 1,210 residents in Wellsville, Missouri (Montgomery County) through 424 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 651 total violations for this system , of which 553 (85%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 55 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 Total Haloacetic Acids (HAA5), recorded in 247 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%).

Wellsville PWS's 651 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
1,210
Total Violations
651
Health-Based Violations
553
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
424
County
Montgomery
School/Daycare
No
MCL Violations
432
Monitoring Violations
55
Treatment Tech Violations
121

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Total Haloacetic Acids (HAA5) MCL 247 2011
TTHM MCL 185 2011
CARBON, TOTAL TT 93 2009
Public Notice Other 31 2023
Surface Water Treatment Rule TT 28 2001
Coliform (TCR) MR 21 2014
Revised Total Coliform Rule MON 12 2022
Consumer Confidence Rule Other 6 2025
TTHM MR 3 2022
Total Haloacetic Acids (HAA5) MR 3 2022
Arsenic MR 2 1980
Barium MR 2 1980
Cadmium MR 2 1980
Chromium MR 2 1980
Fluoride MR 2 1980
Nitrate MR 2 1980
Selenium MR 2 1980
Mercury MR 2 1980

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 Wellsville 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 MO6010848 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 Wellsville 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 Consumer Confidence Rule Other 6 SDWIS / MO6010848 / 7000
2023 Public Notice Other 31 SDWIS / MO6010848 / 7500
2022 Revised Total Coliform Rule MON 12 SDWIS / MO6010848 / 8000
2022 TTHM MR 3 SDWIS / MO6010848 / 2950
2022 Total Haloacetic Acids (HAA5) MR 3 SDWIS / MO6010848 / 2456
2014 Coliform (TCR) MR 21 SDWIS / MO6010848 / 3100
2011 Total Haloacetic Acids (HAA5) MCL 247 SDWIS / MO6010848 / 2456
2011 TTHM MCL 185 SDWIS / MO6010848 / 2950
2009 CARBON, TOTAL TT 93 SDWIS / MO6010848 / 2920
2001 Surface Water Treatment Rule TT 28 SDWIS / MO6010848 / 0200
1980 Arsenic MR 2 SDWIS / MO6010848 / 1005
1980 Barium MR 2 SDWIS / MO6010848 / 1010
1980 Cadmium MR 2 SDWIS / MO6010848 / 1015
1980 Chromium MR 2 SDWIS / MO6010848 / 1020
1980 Fluoride MR 2 SDWIS / MO6010848 / 1025

How Wellsville PWS Compares

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

Metric Wellsville PWS Missouri avg Federal benchmark
Total violations 651 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 553 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 1,210 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 Wellsville PWS water safe to drink? ▼
Wellsville PWS (PWS ID: MO6010848) has 651 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,210 people using Surface Water sources.
How many people does Wellsville PWS serve? ▼
Wellsville PWS serves 1,210 people in Wellsville, Missouri. It is a Local-owned system using Surface Water water sources with 424 service connections.
What type of violations does Wellsville PWS have? ▼
Wellsville PWS has 651 total violations: 553 health-based violations (MCL exceedances or treatment failures), 55 monitoring/reporting violations, and 121 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Wellsville PWS water? ▼
No PFAS testing data is available for Wellsville PWS under the EPA's UCMR5 monitoring program.
What water source does Wellsville PWS use? ▼
Wellsville 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.