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Sterlington, LA Tap Water Quality 2026

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

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

Main Utility: West Sterlington Water System PWSID: LA1111017 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.

C

Sterlington earns a C 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
34 violations since 2015, 31 health-based
No violations currently open
Sterlington's lead level vs. all Louisiana community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.00 ppb — 7% of the federal action level
✓ Lower lead than 88% of Louisiana utilities
Population Served
788
~365 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
34 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.
107.7% of EPA action level
1,400 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
TTHM MCL EXCEEDANCE 0.26 MG/L 0.080 mg/L 2026 Archived
TTHM MCL EXCEEDANCE 0.278 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.267 MG/L 0.080 mg/L 2025 Archived
Consumer Confidence Rule OTHER — — 2025 Resolved
TTHM MCL EXCEEDANCE 0.264 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.272 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.27 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.279 MG/L 0.080 mg/L 2024 Archived
Public Notice OTHER — — 2024 Resolved
TTHM MCL EXCEEDANCE 0.287 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.258 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.256 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.246 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.216 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.226 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.222 MG/L 0.080 mg/L 2022 Archived
TTHM MCL EXCEEDANCE 0.217 MG/L 0.080 mg/L 2022 Archived
TTHM MCL EXCEEDANCE 0.227 MG/L 0.080 mg/L 2022 Archived
TTHM MCL EXCEEDANCE 0.252 MG/L 0.080 mg/L 2022 Archived
Groundwater Rule TREATMENT TECHNIQUE — — 2021 Resolved
TTHM MCL EXCEEDANCE 0.255 MG/L 0.080 mg/L 2021 Archived
TTHM MCL EXCEEDANCE 0.26 MG/L 0.080 mg/L 2021 Archived
TTHM MCL EXCEEDANCE 0.255 MG/L 0.080 mg/L 2021 Archived
TTHM MCL EXCEEDANCE 0.239 MG/L 0.080 mg/L 2021 Archived
TTHM MCL EXCEEDANCE 0.239 MG/L 0.080 mg/L 2020 Archived
TTHM MCL EXCEEDANCE 0.239 MG/L 0.080 mg/L 2020 Archived
TTHM MCL EXCEEDANCE 0.24 MG/L 0.080 mg/L 2020 Archived
TTHM MCL EXCEEDANCE 0.222 MG/L 0.080 mg/L 2020 Archived
TTHM MCL EXCEEDANCE 0.201 MG/L 0.080 mg/L 2019 Archived
Public Notice OTHER — — 2019 Resolved
TTHM MCL EXCEEDANCE 0.192 MG/L 0.080 mg/L 2019 Archived
TTHM MCL EXCEEDANCE 0.171 MG/L 0.080 mg/L 2019 Archived
TTHM MCL EXCEEDANCE 155 UG/L 0.080 mg/L 2019 Archived
TTHM MCL EXCEEDANCE 172 UG/L 0.080 mg/L 2018 Archived
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

34 violations are on record since 2015, of which 31 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility West Sterlington Water System
PWSID LA1111017
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 788
Service connections 365
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Sterlington 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 Sterlington 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 Sterlington? ▼
West Sterlington Water System (PWSID LA1111017), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-10-28. No significant deficiencies were recorded.

What Should Sterlington 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.

Nearby Cities in Louisiana

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