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Frederick, OK Tap Water Quality 2026

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

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

Main Utility: Frederick PWSID: OK1011401 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.80 ppb, 12% of the action level and no violations are open. PFAS was sampled but not enough times for a compliance determination.

C

Frederick earns a C for water quality

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

Lead: 1.80 ppb — 12% of the federal action level
PFAS sampled, too few results to judge
25 violations since 2015, 22 health-based
No violations currently open
Frederick's lead level vs. all Oklahoma community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.80 ppb — 12% of the federal action level
✓ Lower lead than 56% of Oklahoma utilities
Population Served
3140
~2429 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
25 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
12% of EPA action level
1.80 ppb
Action level: 15 ppb
The 90th-percentile lead result is 1.80 ppb, 12% 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
Asbestos MCL EXCEEDANCE 106 MFL 7 MFL 2026 Archived
Asbestos MCL EXCEEDANCE 105 MFL 7 MFL 2025 Archived
Asbestos MCL EXCEEDANCE 80 MFL 7 MFL 2025 Archived
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Resolved
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Resolved
TTHM MCL EXCEEDANCE 0.086 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.096 MG/L 0.080 mg/L 2023 Archived
CARBON, TOTAL TREATMENT TECHNIQUE 0.95 RATIO TT 2023 Archived
CARBON, TOTAL TREATMENT TECHNIQUE 0.92 RATIO TT 2023 Archived
CARBON, TOTAL TREATMENT TECHNIQUE 0.9 RATIO TT 2023 Archived
TTHM MCL EXCEEDANCE 0.105 MG/L 0.080 mg/L 2018 Resolved
Chlorite MCL EXCEEDANCE 1.3 MG/L 1.0 mg/L 2018 Resolved
TTHM MCL EXCEEDANCE 0.108 MG/L 0.080 mg/L 2018 Resolved
TTHM MCL EXCEEDANCE 0.109 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.097 MG/L 0.080 mg/L 2017 Resolved
Chlorite MCL EXCEEDANCE 1.1 MG/L 1.0 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.102 MG/L 0.080 mg/L 2015 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2015 Resolved
Chlorite MONITORING AND REPORTING — 1.0 mg/L 2015 Resolved
TTHM MCL EXCEEDANCE 0.143 MG/L 0.080 mg/L 2015 Resolved
TTHM MCL EXCEEDANCE 0.199 MG/L 0.080 mg/L 2015 Resolved
CARBON, TOTAL TREATMENT TECHNIQUE — TT 2015 Resolved
TTHM MCL EXCEEDANCE 0.226 MG/L 0.080 mg/L 2015 Resolved
CARBON, TOTAL TREATMENT TECHNIQUE — TT 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

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

About the Main Water System

Utility Frederick
PWSID OK1011401
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 3,140
Service connections 2,429
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Frederick tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.80 ppb, 12% of the action level.
Does Frederick water have PFAS? ▼
It was sampled, but no sampling point had enough results for a compliance determination.
Who supplies water to Frederick? ▼
Frederick (PWSID OK1011401), 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 2026-03-11. Inspectors recorded 4 significant deficiencies.

What Should Frederick 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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