Lonoke, AR Tap Water Quality 2026

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

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

Main Utility: Lonoke Waterworks PWSID: AR0000343 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead is 1.00 ppb, 7% of the action level and no violations are open. PFAS was sampled but not enough times for a compliance determination.

Lonoke earns a B for water quality

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

Lead: 1.00 ppb — 7% of the federal action level

PFAS sampled, too few results to judge

6 violations since 2015, 5 health-based

No violations currently open

Lonoke's lead level vs. all Arkansas community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 1.00 ppb — 7% of the federal action level

✓ Lower lead than 100% of Arkansas utilities

Population Served

4167

~1707 connections

Water Source

Groundwater

Drawn from wells — SDWIS source code GW

Active Violations

6 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

7% of EPA action level

1.00 ppb

Action level: 15 ppb

The 90th-percentile lead result is 1.00 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)

Contaminant	Type	Measured	Limit	Period	Status
Stage 1 Disinfectants and Disinfection Byproducts Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Stage 1 Disinfectants and Disinfection Byproducts Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Stage 1 Disinfectants and Disinfection Byproducts Rule	TREATMENT TECHNIQUE	—	—	2025	Resolved
Stage 1 Disinfectants and Disinfection Byproducts Rule	TREATMENT TECHNIQUE	—	—	2024	Resolved
Stage 1 Disinfectants and Disinfection Byproducts Rule	TREATMENT TECHNIQUE	—	—	2024	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2019	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

6 violations are on record since 2015, of which 5 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Lonoke Waterworks

PWSID AR0000343

Water source Groundwater — Drawn from wells — SDWIS source code GW

Population served 4,167

Service connections 1,707

Systems serving this area 3

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Lonoke tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open. Lead is 1.00 ppb, 7% of the action level.

Does Lonoke water have PFAS? ▼

It was sampled, but no sampling point had enough results for a compliance determination.

Who supplies water to Lonoke? ▼

Lonoke Waterworks (PWSID AR0000343), one of 3 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW

When was this system last inspected? ▼

It was last inspected on 2025-04-16. No significant deficiencies were recorded.

What Should Lonoke 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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