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St. Joseph, LA Tap Water Quality 2026

Water quality report for St. Joseph, LA — 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: Town Of St Joseph Water System PWSID: LA1107004 Updated: 2026 Q2
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4 violations currently open

Lead is 3.00 ppb, 20% of the action level. PFAS has never been sampled at this system.

D

St. Joseph earns a D for water quality

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

Lead: 3.00 ppb — 20% of the federal action level
PFAS never sampled at this system
39 violations since 2015, 18 health-based
4 violations currently open
St. Joseph's lead level vs. all Louisiana community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.00 ppb — 20% of the federal action level
✓ Lower lead than 20% of Louisiana utilities
Population Served
831
~444 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
4
4 open of 39 since 2015

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
20% of EPA action level
3.00 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.
107.7% of EPA action level
1,400 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 3.00 ppb, 20% 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 TREATMENT TECHNIQUE — — 2024 Resolved
Consumer Confidence Rule OTHER — — 2024 Resolved
Public Notice OTHER — — 2024 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2023 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2023 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2023 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2023 Unaddressed
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Unaddressed
Lead and Copper Rule MONITORING AND REPORTING — TT 2022 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2021 Resolved
TTHM MCL EXCEEDANCE 0.104 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.107 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.113 MG/L 0.080 mg/L 2019 Resolved
TTHM MCL EXCEEDANCE 0.108 MG/L 0.080 mg/L 2019 Resolved
TTHM MCL EXCEEDANCE 0.118 MG/L 0.080 mg/L 2019 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.062 MG/L 0.060 mg/L 2019 Resolved
Public Notice OTHER — — 2019 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.061 MG/L 0.060 mg/L 2019 Resolved
TTHM MCL EXCEEDANCE 0.115 MG/L 0.080 mg/L 2019 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2018 Resolved
TTHM MCL EXCEEDANCE 0.094 MG/L 0.080 mg/L 2018 Resolved
Public Notice OTHER — — 2018 Resolved
TTHM MCL EXCEEDANCE 96 UG/L 0.080 mg/L 2018 Resolved
Public Notice OTHER — — 2017 Resolved
Revised Total Coliform Rule MCL EXCEEDANCE — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2016 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2016 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2016 Resolved
Public Notice OTHER — — 2016 Addressed
Public Notice OTHER — — 2016 Resolved
Public Notice OTHER — — 2015 Resolved
Consumer Confidence Rule OTHER — — 2015 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Consumer Confidence Rule OTHER — — 2015 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Archived
Chlorine MONITORING AND REPORTING — 4.0 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

4 violations remain open, out of 39 recorded since 2015 (18 health-based).

About the Main Water System

Utility Town Of St Joseph Water System
PWSID LA1107004
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 831
Service connections 444
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. 4 violation(s) remain open. Lead is 3.00 ppb, 20% 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? ▼
Town Of St Joseph Water System (PWSID LA1107004). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2026-01-05. No significant deficiencies were recorded.

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
Follow the open violation
This system has an unresolved violation. Contact the supplier for its corrective-action schedule.

Nearby Cities in Louisiana

Newellton, La Tap Water Quality 2026 Tensas Parish Waterproof, La Tap Water Quality 2026 Tensas Parish