States ›Oklahoma ›Marshall County ›Oakland

Oakland, OK Tap Water Quality 2026

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

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

Main Utility: Marshall County Rural Water District #2 PWSID: OK1010848 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.10 ppb, 7% of the action level and no violations are open. No PFAS was detected.

B

Oakland earns a B for water quality

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

Lead: 1.10 ppb — 7% of the federal action level
PFAS tested, none detected
44 violations since 2015, 44 health-based
No violations currently open
Oakland's lead level vs. all Oklahoma community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.10 ppb — 7% of the federal action level
✓ Lower lead than 81% of Oklahoma utilities
Population Served
432
~7146 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
44 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
7% of EPA action level
1.10 ppb
Action level: 15 ppb
The 90th-percentile lead result is 1.10 ppb, 7% 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 MCL EXCEEDANCE 0.094 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.114 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.091 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.102 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.092 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.095 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.107 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.093 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.086 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.097 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.086 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.096 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.09 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.091 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.094 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.091 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2022 Archived
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2022 Archived
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2022 Archived
TTHM MCL EXCEEDANCE 0.086 MG/L 0.080 mg/L 2022 Archived
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2022 Archived
TTHM MCL EXCEEDANCE 0.082 MG/L 0.080 mg/L 2022 Archived
TTHM MCL EXCEEDANCE 0.081 MG/L 0.080 mg/L 2022 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.061 MG/L 0.060 mg/L 2019 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.063 MG/L 0.060 mg/L 2019 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.065 MG/L 0.060 mg/L 2019 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.062 MG/L 0.060 mg/L 2019 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.061 MG/L 0.060 mg/L 2016 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.069 MG/L 0.060 mg/L 2015 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.073 MG/L 0.060 mg/L 2015 Resolved
TTHM MCL EXCEEDANCE 0.086 MG/L 0.080 mg/L 2015 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.064 MG/L 0.060 mg/L 2015 Resolved
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2015 Resolved
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 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

44 violations are on record since 2015, of which 44 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Marshall County Rural Water District #2
PWSID OK1010848
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 432
Service connections 7,146
Systems serving this area 3
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Oakland tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.10 ppb, 7% of the action level.
Does Oakland water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Oakland? ▼
Marshall County Rural Water District #2 (PWSID OK1010848), 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 2026-01-08. No significant deficiencies were recorded.

What Should Oakland 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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