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St. Joseph, TN Tap Water Quality 2026

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

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

Main Utility: St Joseph Water System PWSID: TN0000604 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.00 ppb, 7% of the action level and no violations are open. PFAS has never been sampled at this system.

B

St. Joseph earns a B for water quality

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

Lead: 1.00 ppb — 7% of the federal action level
PFAS never sampled at this system
21 violations since 2015, 0 health-based
No violations currently open
St. Joseph's lead level vs. all Tennessee community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.00 ppb — 7% of the federal action level
✓ Lower lead than 80% of Tennessee utilities
Population Served
782
~572 connections
Water Source
Surface water
Groundwater under the direct influence of surface water — SDWIS source code GU
Active Violations
0
21 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
7% of EPA action level
1.00 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.
215.4% of EPA action level
2,800 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 1.00 ppb, 7% 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
Consumer Confidence Rule OTHER — — 2025 Unaddressed
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2025 Archived
Revised Total Coliform Rule MONITORING FAILURE — — 2024 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2024 Resolved
Consumer Confidence Rule OTHER — — 2023 Unaddressed
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Resolved
Public Notice OTHER — — 2022 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2022 Resolved
Consumer Confidence Rule OTHER — — 2021 Addressed
Consumer Confidence Rule OTHER — — 2020 Addressed
Interim Enhanced Surface Water Treatment Rule OTHER — — 2020 Addressed
Public Notice OTHER — — 2020 Resolved
Interim Enhanced Surface Water Treatment Rule OTHER — — 2019 Addressed
CARBON, TOTAL MONITORING AND REPORTING — TT 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2015 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2015 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/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

21 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility St Joseph Water System
PWSID TN0000604
Water source Surface water — Groundwater under the direct influence of surface water — SDWIS source code GU
Population served 782
Service connections 572
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is St. Joseph tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.00 ppb, 7% of the action level.
Does St. Joseph 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 St. Joseph? ▼
St Joseph Water System (PWSID TN0000604). Surface water. Groundwater under the direct influence of surface water — SDWIS source code GU
When was this system last inspected? ▼
It was last inspected on 2024-12-10. Inspectors recorded 2 significant deficiencies.

What Should St. Joseph 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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