States ›Missouri ›St. Francois County ›Bonne Terre

Bonne Terre, MO Tap Water Quality 2026

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

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

Main Utility: Bonne Terre Pws PWSID: MO4010087 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 12.90 ppb, 86% of the action level and no violations are open. PFAS was sampled but not enough times for a compliance determination.

C

Bonne Terre earns a C for water quality

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

Lead: 12.90 ppb — 86% of the federal action level
PFAS sampled, too few results to judge
13 violations since 2015, 8 health-based
No violations currently open
Bonne Terre's lead level vs. all Missouri community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 12.90 ppb — 86% of the federal action level
✓ Lower lead than 0% of Missouri utilities
Population Served
4468
~1597 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
13 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
86% of EPA action level
12.90 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.
107.2% of EPA action level
1,393 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 12.90 ppb, 86% 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
E. COLI MONITORING AND REPORTING — 0 2018 Resolved
Public Notice OTHER — — 2017 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 6.18 PCI/L 5 pCi/L 2016–2017 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 8.4 PCI/L 5 pCi/L 2016–2017 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 9.18 PCI/L 5 pCi/L 2016–2017 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 9.78 PCI/L 5 pCi/L 2016 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 8.25 PCI/L 5 pCi/L 2015–2016 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 8.03 PCI/L 5 pCi/L 2015–2016 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 7.6 PCI/L 5 pCi/L 2015–2016 Resolved
Combined Radium (-226 and -228) MCL EXCEEDANCE 7.5 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

13 violations are on record since 2015, of which 8 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Bonne Terre Pws
PWSID MO4010087
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 4,468
Service connections 1,597
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Bonne Terre tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 12.90 ppb, 86% of the action level.
Does Bonne Terre water have PFAS? ▼
It was sampled, but no sampling point had enough results for a compliance determination.
Who supplies water to Bonne Terre? ▼
Bonne Terre Pws (PWSID MO4010087). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-06-18. No significant deficiencies were recorded.

What Should Bonne Terre Residents Do?

1
Consider a filter certified for lead
Look for NSF/ANSI 53 certification for lead reduction.
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.

Nearby Cities in Missouri

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