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Community Water System · PWS MO2010875

Wyaconda PWS

Wyaconda, Missouri 63474-0000 - drinking water served from groundwater sources to 227 people, tracked in EPA SDWIS and UCMR5.

227
People served
130
EPA violations
64
Health-based
Untested
UCMR5 result

The verdict

EPA records 130 drinking-water violations at Wyaconda PWS, 49% of them health-based - above the Missouri per-system average.

130
Total EPA violations on record
49%
Health-based (MCL / treatment failure)
227
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Wyaconda PWS

Wyaconda PWS is a local-owned community water system that delivers drinking water to 227 residents in Wyaconda, Missouri (Clark County) through 115 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 130 total violations for this system , of which 64 (49%) 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 2022.

The most frequently cited contaminant at this system is Interim Enhanced Surface Water Treatment Rule, recorded in 40 violations (TT, 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%).

Wyaconda PWS's 130 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
227
Total Violations
130
Health-Based Violations
64
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
115
County
Clark
School/Daycare
No
MCL Violations
18
Monitoring Violations
55
Treatment Tech Violations
46

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Interim Enhanced Surface Water Treatment Rule TT 40 2009
Interim Enhanced Surface Water Treatment Rule MR 32 2009
Coliform (TCR) MR 18 2013
Total Haloacetic Acids (HAA5) MCL 7 2009
Public Notice Other 7 2009
CARBON, TOTAL TT 6 2008
TTHM MCL 6 2009
Atrazine MCL 5 2006
Revised Total Coliform Rule MON 4 2022
Lead and Copper Rule MR 1 2011
Consumer Confidence Rule Other 1 2004

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 Wyaconda 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 MO2010875 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 Wyaconda 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
2022 Revised Total Coliform Rule MON 4 SDWIS / MO2010875 / 8000
2013 Coliform (TCR) MR 18 SDWIS / MO2010875 / 3100
2011 Lead and Copper Rule MR 1 SDWIS / MO2010875 / 5000
2009 Interim Enhanced Surface Water Treatment Rule TT 40 SDWIS / MO2010875 / 0300
2009 Interim Enhanced Surface Water Treatment Rule MR 32 SDWIS / MO2010875 / 0300
2009 Total Haloacetic Acids (HAA5) MCL 7 SDWIS / MO2010875 / 2456
2009 Public Notice Other 7 SDWIS / MO2010875 / 7500
2009 TTHM MCL 6 SDWIS / MO2010875 / 2950
2008 CARBON, TOTAL TT 6 SDWIS / MO2010875 / 2920
2006 Atrazine MCL 5 SDWIS / MO2010875 / 2050
2004 Consumer Confidence Rule Other 1 SDWIS / MO2010875 / 7000

How Wyaconda PWS Compares

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

Metric Wyaconda PWS Missouri avg Federal benchmark
Total violations 130 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 64 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 227 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 Wyaconda PWS water safe to drink? ▼
Wyaconda PWS (PWS ID: MO2010875) has 130 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 227 people using Groundwater sources.
How many people does Wyaconda PWS serve? ▼
Wyaconda PWS serves 227 people in Wyaconda, Missouri. It is a Local-owned system using Groundwater water sources with 115 service connections.
What type of violations does Wyaconda PWS have? ▼
Wyaconda PWS has 130 total violations: 64 health-based violations (MCL exceedances or treatment failures), 55 monitoring/reporting violations, and 46 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Wyaconda PWS water? ▼
No PFAS testing data is available for Wyaconda PWS under the EPA's UCMR5 monitoring program.
What water source does Wyaconda PWS use? ▼
Wyaconda 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.