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Shawnee, OK Tap Water Quality 2026

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

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

Main Utility: Shawnee Municipal Authority PWSID: OK1020504 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.80 ppb, 19% of the action level and no violations are open. No PFAS was detected.

C

Shawnee earns a C for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 2.80 ppb — 19% of the federal action level
PFAS tested, none detected
13 violations since 2015, 8 health-based
No violations currently open
Shawnee's lead level vs. all Oklahoma community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.80 ppb — 19% of the federal action level
✓ Lower lead than 33% of Oklahoma utilities
Population Served
28937
~13772 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
19% of EPA action level
2.80 ppb
Action level: 15 ppb
The 90th-percentile lead result is 2.80 ppb, 19% 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
CARBON, TOTAL MONITORING AND REPORTING — TT 2026 Archived
CARBON, TOTAL MONITORING AND REPORTING — TT 2026 Archived
CARBON, TOTAL TREATMENT TECHNIQUE 0.9 RATIO TT 2025 Archived
CARBON, TOTAL TREATMENT TECHNIQUE 0.82 RATIO TT 2025 Archived
CARBON, TOTAL TREATMENT TECHNIQUE 0.7 RATIO TT 2025 Archived
CARBON, TOTAL TREATMENT TECHNIQUE 0.57 RATIO TT 2025 Archived
CARBON, TOTAL MONITORING AND REPORTING — TT 2024 Resolved
CARBON, TOTAL MONITORING AND REPORTING — TT 2024 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2020 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Archived
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 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

13 violations are on record since 2015, of which 8 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Shawnee Municipal Authority
PWSID OK1020504
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 28,937
Service connections 13,772
Systems serving this area 6
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Shawnee tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.80 ppb, 19% of the action level.
Does Shawnee water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Shawnee? ▼
Shawnee Municipal Authority (PWSID OK1020504), one of 6 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 2024-12-10. Inspectors recorded 2 significant deficiencies.

What Should Shawnee 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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