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Pawhuska, OK Tap Water Quality 2026

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

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

Main Utility: Pawhuska PWSID: OK1021301 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 3.60 ppb, 24% of the action level and no violations are open. No PFAS was detected.

B

Pawhuska earns a B for water quality

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

Lead: 3.60 ppb — 24% of the federal action level
PFAS tested, none detected
40 violations since 2015, 21 health-based
No violations currently open
Pawhuska's lead level vs. all Oklahoma community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.60 ppb — 24% of the federal action level
✓ Lower lead than 24% of Oklahoma utilities
Population Served
1368
~2136 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
40 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
24% of EPA action level
3.60 ppb
Action level: 15 ppb
The 90th-percentile lead result is 3.60 ppb, 24% 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
TTHM MONITORING AND REPORTING — 0.080 mg/L 2025 Resolved
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2025 Archived
TTHM MONITORING AND REPORTING — 0.080 mg/L 2024 Resolved
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Resolved
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2022 Resolved
Consumer Confidence Rule OTHER — — 2022 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2021 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2021 Resolved
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2021 Resolved
TTHM MCL EXCEEDANCE 0.082 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2020 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2020 Resolved
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2020 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2020 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2020 Resolved
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 2020 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2020 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2020 Resolved
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2020 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2019 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Resolved
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2019 Resolved
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2019 Resolved
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2018 Resolved
Nitrate-Nitrite MONITORING AND REPORTING — — 2017 Resolved
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2017 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2017 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2017 Resolved
Gross Beta Particle Activity MONITORING AND REPORTING — 4 mrem/yr 2017 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2016 Resolved
Revised Total Coliform Rule MCL EXCEEDANCE — — 2016 Resolved
TTHM MCL EXCEEDANCE 0.082 MG/L 0.080 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.086 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

40 violations are on record since 2015, of which 21 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Pawhuska
PWSID OK1021301
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 1,368
Service connections 2,136
Systems serving this area 3
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Pawhuska tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 3.60 ppb, 24% of the action level.
Does Pawhuska water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Pawhuska? ▼
Pawhuska (PWSID OK1021301), 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 2025-09-23. No significant deficiencies were recorded.

What Should Pawhuska 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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