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Community Water System · PWS MO4010689

Risco PWS

Risco, Missouri 63874-0000 - drinking water served from groundwater sources to 278 people, tracked in EPA SDWIS and UCMR5.

278
People served
83
EPA violations
34
Health-based
Untested
UCMR5 result

The verdict

EPA records 83 drinking-water violations at Risco PWS, 41% of them health-based - above the Missouri per-system average.

83
Total EPA violations on record
41%
Health-based (MCL / treatment failure)
278
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Risco PWS

Risco PWS is a local-owned community water system that delivers drinking water to 278 residents in Risco, Missouri (New Madrid County) through 150 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 83 total violations for this system , of which 34 (41%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 37 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 Groundwater Rule, recorded in 28 violations (MR). 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%).

Risco PWS's 83 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
278
Total Violations
83
Health-Based Violations
34
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
150
County
New Madrid
School/Daycare
No
MCL Violations
16
Monitoring Violations
37
Treatment Tech Violations
18

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Groundwater Rule MR 28 2021
Groundwater Rule TT 18 2022
Coliform (TCR) MCL 16 2014
Coliform (TCR) MR 8 2014
Consumer Confidence Rule Other 4 2025
Public Notice Other 2 2022
Lead and Copper Rule MR 1 2024
LEAD AND COPPER RULE REVISIONS RPT 1 2024

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 Risco 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 MO4010689 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 Risco 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 4 SDWIS / MO4010689 / 7000
2024 Lead and Copper Rule MR 1 SDWIS / MO4010689 / 5000
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / MO4010689 / 5200
2022 Groundwater Rule TT 18 SDWIS / MO4010689 / 0700
2022 Public Notice Other 2 SDWIS / MO4010689 / 7500
2021 Groundwater Rule MR 28 SDWIS / MO4010689 / 0700
2014 Coliform (TCR) MCL 16 SDWIS / MO4010689 / 3100
2014 Coliform (TCR) MR 8 SDWIS / MO4010689 / 3100

How Risco PWS Compares

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

Metric Risco PWS Missouri avg Federal benchmark
Total violations 83 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 34 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 278 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 Risco PWS water safe to drink? ▼
Risco PWS (PWS ID: MO4010689) has 83 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 278 people using Groundwater sources.
How many people does Risco PWS serve? ▼
Risco PWS serves 278 people in Risco, Missouri. It is a Local-owned system using Groundwater water sources with 150 service connections.
What type of violations does Risco PWS have? ▼
Risco PWS has 83 total violations: 34 health-based violations (MCL exceedances or treatment failures), 37 monitoring/reporting violations, and 18 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Risco PWS water? ▼
No PFAS testing data is available for Risco PWS under the EPA's UCMR5 monitoring program.
What water source does Risco PWS use? ▼
Risco 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.