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Silex, MO Tap Water Quality 2026

Water quality report for Silex, MO — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Silex's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Silex Pws PWSID: MO6010902 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.09 ppb, 14% of the action level and no violations are open. PFAS has never been sampled at this system.

D

Silex earns a D for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 2.09 ppb — 14% of the federal action level
PFAS never sampled at this system
53 violations since 2015, 32 health-based
No violations currently open
Silex's lead level vs. all Missouri community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.09 ppb — 14% of the federal action level
✓ Lower lead than 53% of Missouri utilities
Population Served
23
~98 connections
Water Source
Surface water
Purchased from another system — SDWIS source code SWP
Active Violations
0
53 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
14% of EPA action level
2.09 ppb
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
166.6% of EPA action level
2,166 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 2.09 ppb, 14% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2025 Unaddressed
Public Notice OTHER — — 2025 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.58 PCI/L 5 pCi/L 2024–2025 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2024 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.2 PCI/L 5 pCi/L 2024 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.2 PCI/L 5 pCi/L 2023–2024 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.5 PCI/L 5 pCi/L 2023–2024 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2023 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.8 PCI/L 5 pCi/L 2023–2024 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.55 PCI/L 5 pCi/L 2023 Resolved
Public Notice OTHER — — 2022 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2022 Resolved
E. COLI MONITORING AND REPORTING — 0 2022 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.6 PCI/L 5 pCi/L 2022–2023 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.75 PCI/L 5 pCi/L 2022–2023 Resolved
Stage 1 Disinfectants and Disinfection Byproducts Rule TREATMENT TECHNIQUE — — 2022 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2022 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2022 Resolved
Radium-226 MONITORING AND REPORTING — — 2022 Resolved
Radium-228 MONITORING AND REPORTING — — 2022 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.87 PCI/L 5 pCi/L 2022–2023 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.2 PCI/L 5 pCi/L 2022 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.93 PCI/L 5 pCi/L 2021–2022 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.63 PCI/L 5 pCi/L 2021–2022 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.5 PCI/L 5 pCi/L 2021–2022 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2021 Resolved
Public Notice OTHER — — 2020 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2020 Resolved
Stage 1 Disinfectants and Disinfection Byproducts Rule TREATMENT TECHNIQUE — — 2020 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2020 Resolved
Public Notice OTHER — — 2019 Resolved
Public Notice OTHER — — 2019 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.83 PCI/L 5 pCi/L 2018–2019 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.85 PCI/L 5 pCi/L 2018–2019 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.6 PCI/L 5 pCi/L 2018 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.85 PCI/L 5 pCi/L 2017–2018 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.58 PCI/L 5 pCi/L 2017–2018 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.78 PCI/L 5 pCi/L 2017 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.63 PCI/L 5 pCi/L 2016–2017 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.83 PCI/L 5 pCi/L 2016–2017 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.63 PCI/L 5 pCi/L 2016–2017 Resolved
Public Notice OTHER — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.4 PCI/L 5 pCi/L 2016 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.75 PCI/L 5 pCi/L 2015–2016 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.58 PCI/L 5 pCi/L 2015–2016 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.55 PCI/L 5 pCi/L 2015–2016 Resolved
Gross Alpha, Excl. Radon and U MCL EXCEEDANCE 15.78 PCI/L 15 pCi/L 2015 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 5.65 PCI/L 5 pCi/L 2015 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

53 violations are on record since 2015, of which 32 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Silex Pws
PWSID MO6010902
Water source Surface water — Purchased from another system — SDWIS source code SWP
Population served 23
Service connections 98
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Silex tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.09 ppb, 14% of the action level.
Does Silex water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to Silex? ▼
Silex Pws (PWSID MO6010902). Surface water. Purchased from another system — SDWIS source code SWP
When was this system last inspected? ▼
It was last inspected on 2023-09-06. Inspectors recorded 3 significant deficiencies.

What Should Silex Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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