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Langley, OK Tap Water Quality 2026

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

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

Main Utility: Langley PWSID: OK1021604 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.30 ppb, 9% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Langley earns a B for water quality

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

Lead: 1.30 ppb — 9% of the federal action level
PFAS never sampled at this system
13 violations since 2015, 11 health-based
No violations currently open
Langley's lead level vs. all Oklahoma community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.30 ppb — 9% of the federal action level
✓ Lower lead than 72% of Oklahoma utilities
Population Served
447
~622 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
13 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
9% of EPA action level
1.30 ppb
Action level: 15 ppb
The 90th-percentile lead result is 1.30 ppb, 9% 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)

ContaminantTypeMeasuredLimitPeriodStatus
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2025 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2021 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.063 MG/L 0.060 mg/L 2021 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.064 MG/L 0.060 mg/L 2020 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.069 MG/L 0.060 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.091 MG/L 0.080 mg/L 2020 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.071 MG/L 0.060 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2019 Resolved
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2019 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2018 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

13 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 Langley
PWSID OK1021604
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 447
Service connections 622
Systems serving this area 3
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Langley tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.30 ppb, 9% of the action level.
Does Langley 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 Langley? ▼
Langley (PWSID OK1021604), one of 3 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 2025-07-22. No significant deficiencies were recorded.

What Should Langley 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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