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Langston, OK Tap Water Quality 2026

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

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

Main Utility: Langston Pwa PWSID: OK1020911 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

Langston 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
22 violations since 2015, 11 health-based
No violations currently open
Langston's lead level vs. all Oklahoma community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of Oklahoma utilities
Population Served
1233
~179 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
22 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
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2026 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2025 Archived
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Archived
Lead and Copper Rule MONITORING AND REPORTING — TT 2025 Unaddressed
Consumer Confidence Rule OTHER — — 2025 Unaddressed
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2025 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2024 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Archived
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Resolved
TTHM MCL EXCEEDANCE 0.108 MG/L 0.080 mg/L 2021 Resolved
TTHM MCL EXCEEDANCE 0.104 MG/L 0.080 mg/L 2021 Resolved
TTHM MCL EXCEEDANCE 0.098 MG/L 0.080 mg/L 2021 Resolved
TTHM MCL EXCEEDANCE 0.098 MG/L 0.080 mg/L 2021 Resolved
TTHM MCL EXCEEDANCE 0.101 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.104 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.1 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.1 MG/L 0.080 mg/L 2020 Resolved
Consumer Confidence Rule OTHER — — 2017 Resolved
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.091 MG/L 0.080 mg/L 2016 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

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

About the Main Water System

Utility Langston Pwa
PWSID OK1020911
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 1,233
Service connections 179
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Langston tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does Langston 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 Langston? ▼
Langston Pwa (PWSID OK1020911), 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 2026-02-03. Inspectors recorded 2 significant deficiencies.

What Should Langston 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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