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Zwolle, LA Tap Water Quality 2026

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

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

Main Utility: Town Of Zwolle Water System PWSID: LA1085032 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead was not detected and no violations are open. PFAS has never been sampled at this system.

C

Zwolle earns a C for water quality

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

Lead: not detected
PFAS never sampled at this system
37 violations since 2015, 28 health-based
No violations currently open
Zwolle's lead level vs. all Louisiana community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of Louisiana utilities
Population Served
1420
~840 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
37 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Public Notice OTHER — — 2025 Unaddressed
Lead and Copper Rule MONITORING AND REPORTING — TT 2024 Resolved
TTHM MCL EXCEEDANCE 0.086 MG/L 0.080 mg/L 2024 Resolved
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2024 Resolved
TTHM MCL EXCEEDANCE 0.101 MG/L 0.080 mg/L 2024 Resolved
TTHM MCL EXCEEDANCE 0.104 MG/L 0.080 mg/L 2024 Resolved
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 2023 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2022 Resolved
Public Notice OTHER — — 2022 Resolved
Public Notice OTHER — — 2022 Resolved
Revised Total Coliform Rule TREATMENT TECHNIQUE — — 2022 Resolved
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2022 Resolved
Public Notice OTHER — — 2022 Resolved
TTHM MCL EXCEEDANCE 0.09 MG/L 0.080 mg/L 2022 Resolved
TTHM MCL EXCEEDANCE 0.111 MG/L 0.080 mg/L 2021 Resolved
Public Notice OTHER — — 2021 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2021 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2021 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2021 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2021 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2021 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2021 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2021 Resolved
TTHM MCL EXCEEDANCE 0.113 MG/L 0.080 mg/L 2021 Resolved
Public Notice OTHER — — 2021 Resolved
TTHM MCL EXCEEDANCE 0.087 MG/L 0.080 mg/L 2021 Resolved
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2021 Resolved
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 90 UG/L 0.080 mg/L 2018 Resolved
TTHM MCL EXCEEDANCE 89 UG/L 0.080 mg/L 2018 Resolved
TTHM MCL EXCEEDANCE 101 UG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 83 UG/L 0.080 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 90 UG/L 0.080 mg/L 2015 Resolved
TTHM MCL EXCEEDANCE 84 UG/L 0.080 mg/L 2015 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Resolved
TTHM MCL EXCEEDANCE 88 UG/L 0.080 mg/L 2015 Resolved
TTHM MCL EXCEEDANCE 86 UG/L 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

37 violations are on record since 2015, of which 28 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Town Of Zwolle Water System
PWSID LA1085032
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 1,420
Service connections 840
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Zwolle tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does Zwolle 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 Zwolle? ▼
Town Of Zwolle Water System (PWSID LA1085032). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-11-22. Inspectors recorded 2 significant deficiencies.

What Should Zwolle 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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