Clarksville, OK Tap Water Quality 2026

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

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

Main Utility: Porter Pwa PWSID: OK3007306 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead is 1.40 ppb, 9% of the action level and no violations are open. PFAS has never been sampled at this system.

Clarksville earns a B for water quality

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

Lead: 1.40 ppb — 9% of the federal action level

PFAS never sampled at this system

54 violations since 2015, 42 health-based

No violations currently open

Clarksville's lead level vs. all Oklahoma community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 1.40 ppb — 9% of the federal action level

✓ Lower lead than 69% of Oklahoma utilities

Population Served

~856 connections

Water Source

Surface water

Purchased from another system — SDWIS source code SWP

Active Violations

54 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

9% of EPA action level

1.40 ppb

Action level: 15 ppb

The 90th-percentile lead result is 1.40 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)

Contaminant	Type	Measured	Limit	Period	Status
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.066 MG/L	0.060 mg/L	2025	Archived
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
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2024	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2024	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2024	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	0.089 MG/L	0.080 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	0.097 MG/L	0.080 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	0.102 MG/L	0.080 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	0.093 MG/L	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	0.087 MG/L	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	0.084 MG/L	0.080 mg/L	2022	Resolved
TTHM	MCL EXCEEDANCE	0.081 MG/L	0.080 mg/L	2021	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2020	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2020	Resolved
TTHM	MCL EXCEEDANCE	0.089 MG/L	0.080 mg/L	2020	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.083 MG/L	0.060 mg/L	2020	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.096 MG/L	0.060 mg/L	2020	Resolved
TTHM	MCL EXCEEDANCE	0.094 MG/L	0.080 mg/L	2020	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2019	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.119 MG/L	0.060 mg/L	2019	Resolved
TTHM	MCL EXCEEDANCE	0.11 MG/L	0.080 mg/L	2019	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.095 MG/L	0.060 mg/L	2019	Resolved
TTHM	MCL EXCEEDANCE	0.121 MG/L	0.080 mg/L	2019	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2019	Resolved
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2019	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.085 MG/L	0.060 mg/L	2019	Resolved
TTHM	MCL EXCEEDANCE	0.109 MG/L	0.080 mg/L	2019	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.078 MG/L	0.060 mg/L	2019	Resolved
TTHM	MCL EXCEEDANCE	0.101 MG/L	0.080 mg/L	2019	Resolved
TTHM	MCL EXCEEDANCE	0.09 MG/L	0.080 mg/L	2018	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.071 MG/L	0.060 mg/L	2018	Resolved
TTHM	MCL EXCEEDANCE	0.09 MG/L	0.080 mg/L	2018	Resolved
TTHM	MCL EXCEEDANCE	0.097 MG/L	0.080 mg/L	2018	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.067 MG/L	0.060 mg/L	2018	Resolved
TTHM	MCL EXCEEDANCE	0.099 MG/L	0.080 mg/L	2018	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.073 MG/L	0.060 mg/L	2018	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2017	Resolved
TTHM	MCL EXCEEDANCE	0.098 MG/L	0.080 mg/L	2017	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.074 MG/L	0.060 mg/L	2017	Resolved
TTHM	MCL EXCEEDANCE	0.098 MG/L	0.080 mg/L	2017	Resolved
TTHM	MCL EXCEEDANCE	0.098 MG/L	0.080 mg/L	2017	Resolved
TTHM	MCL EXCEEDANCE	0.086 MG/L	0.080 mg/L	2017	Resolved
TTHM	MCL EXCEEDANCE	0.081 MG/L	0.080 mg/L	2016	Resolved
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2016	Resolved
TTHM	MCL EXCEEDANCE	0.09 MG/L	0.080 mg/L	2016	Resolved
TTHM	MCL EXCEEDANCE	0.094 MG/L	0.080 mg/L	2015	Resolved
TTHM	MCL EXCEEDANCE	0.09 MG/L	0.080 mg/L	2015	Resolved
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2015	Resolved
Total Haloacetic Acids (HAA5)	MCL EXCEEDANCE	0.069 MG/L	0.060 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

54 violations are on record since 2015, of which 42 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Porter Pwa

PWSID OK3007306

Water source Surface water — Purchased from another system — SDWIS source code SWP

Population served 17

Service connections 856

Systems serving this area 1

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Clarksville tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open. Lead is 1.40 ppb, 9% of the action level.

Does Clarksville 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 Clarksville? ▼

Porter Pwa (PWSID OK3007306). Surface water. Purchased from another system — SDWIS source code SWP

When was this system last inspected? ▼

It was last inspected on 2025-05-05. No significant deficiencies were recorded.

What Should Clarksville Residents Do?

Read your annual water report

Your supplier publishes a Consumer Confidence Report each July covering the prior year.

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.

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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