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Community Water System · PWS MO6010902

Silex PWS

Silex, Missouri 63377-0000 - drinking water served from surface water sources to 206 people, tracked in EPA SDWIS and UCMR5.

206
People served
555
EPA violations
280
Health-based
Untested
UCMR5 result

The verdict

EPA records 555 drinking-water violations at Silex PWS, 50% of them health-based - above the Missouri per-system average.

555
Total EPA violations on record
50%
Health-based (MCL / treatment failure)
206
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Silex PWS

Silex PWS is a local-owned community water system that delivers drinking water to 206 residents in Silex, Missouri (Lincoln County) through 98 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 280 (50%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 216 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 Combined Radium (-226 and -228), recorded in 219 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%).

Silex 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
206
Total Violations
555
Health-Based Violations
280
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
98
County
Lincoln
School/Daycare
No
MCL Violations
261
Monitoring Violations
216
Treatment Tech Violations
19

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 219 2024
Coliform (TCR) MR 170 2015
Gross Alpha, Excl. Radon and U MCL 41 2015
Revised Total Coliform Rule MON 26 2024
Public Notice Other 21 2025
Groundwater Rule TT 10 2021
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 9 2022
Combined Uranium MR 5 2022
Radium-226 MR 5 2022
Radium-228 MR 5 2022
E. COLI MR 5 2022
Consumer Confidence Rule Other 3 2014
Coliform (TCR) MCL 1 1991

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 Silex 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 MO6010902 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 Silex 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 Public Notice Other 21 SDWIS / MO6010902 / 7500
2024 Combined Radium (-226 and -228) MCL 219 SDWIS / MO6010902 / 4010
2024 Revised Total Coliform Rule MON 26 SDWIS / MO6010902 / 8000
2022 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 9 SDWIS / MO6010902 / 0400
2022 Combined Uranium MR 5 SDWIS / MO6010902 / 4006
2022 Radium-226 MR 5 SDWIS / MO6010902 / 4020
2022 Radium-228 MR 5 SDWIS / MO6010902 / 4030
2022 E. COLI MR 5 SDWIS / MO6010902 / 3014
2021 Groundwater Rule TT 10 SDWIS / MO6010902 / 0700
2015 Coliform (TCR) MR 170 SDWIS / MO6010902 / 3100
2015 Gross Alpha, Excl. Radon and U MCL 41 SDWIS / MO6010902 / 4000
2014 Consumer Confidence Rule Other 3 SDWIS / MO6010902 / 7000
1991 Coliform (TCR) MCL 1 SDWIS / MO6010902 / 3100

How Silex PWS Compares

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

Metric Silex PWS Missouri avg Federal benchmark
Total violations 555 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 280 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 206 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 Silex PWS water safe to drink? ▼
Silex PWS (PWS ID: MO6010902) has 555 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 206 people using Surface Water sources.
How many people does Silex PWS serve? ▼
Silex PWS serves 206 people in Silex, Missouri. It is a Local-owned system using Surface Water water sources with 98 service connections.
What type of violations does Silex PWS have? ▼
Silex PWS has 555 total violations: 280 health-based violations (MCL exceedances or treatment failures), 216 monitoring/reporting violations, and 19 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Silex PWS water? ▼
No PFAS testing data is available for Silex PWS under the EPA's UCMR5 monitoring program.
What water source does Silex PWS use? ▼
Silex 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.