Bayou L'Ourse, LA Tap Water Quality 2026

Water quality report for Bayou L'Ourse, LA — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

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

Main Utility: St Mary Parish Water Sewerage Comm 1 PWSID: LA1101009 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead is 0.82 ppb, 5% of the action level and no violations are open. PFAS has never been sampled at this system.

Bayou L'Ourse earns a C for water quality

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

Lead: 0.82 ppb — 5% of the federal action level

PFAS never sampled at this system

11 violations since 2015, 3 health-based

No violations currently open

Bayou L'Ourse's lead level vs. all Louisiana community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 0.82 ppb — 5% of the federal action level

✓ Lower lead than 91% of Louisiana utilities

Population Served

1786

~1200 connections

Water Source

Surface water

Drawn from surface water — SDWIS source code SW

Active Violations

11 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

5% of EPA action level

0.82 ppb

Action level: 15 ppb

The 90th-percentile lead result is 0.82 ppb, 5% 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.

Contaminant Violations (2015–Present)

Contaminant	Type	Measured	Limit	Period	Status
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.064 MG/L	0.060 mg/L	2025	Archived
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.069 MG/L	0.060 mg/L	2025	Archived
LEAD AND COPPER RULE REVISIONS	TREATMENT TECHNIQUE	—	—	2024	Resolved
Consumer Confidence Rule	OTHER	—	—	2024	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2023	Unaddressed
Consumer Confidence Rule	OTHER	—	—	2021	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2021	Unaddressed
Consumer Confidence Rule	OTHER	—	—	2020	Unaddressed
Consumer Confidence Rule	OTHER	—	—	2019	Resolved
Coliform (TCR)	MONITORING AND REPORTING	—	5% of samples	2015	Resolved
Coliform (TCR)	MONITORING AND REPORTING	—	5% of samples	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

11 violations are on record since 2015, of which 3 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility St Mary Parish Water Sewerage Comm 1

PWSID LA1101009

Water source Surface water — Drawn from surface water — SDWIS source code SW

Population served 1,786

Service connections 1,200

Systems serving this area 2

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Bayou L'Ourse tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open. Lead is 0.82 ppb, 5% of the action level.

Does Bayou L'Ourse 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 Bayou L'Ourse? ▼

St Mary Parish Water Sewerage Comm 1 (PWSID LA1101009), one of 2 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW

When was this system last inspected? ▼

It was last inspected on 2025-07-28. Inspectors recorded 3 significant deficiencies.

What Should Bayou L'Ourse Residents Do?

Read your annual water report

Your supplier publishes a Consumer Confidence Report each July covering the prior year.

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.

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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