Lead in Benton County Water: What Public Data Reveals and What It Doesn’t

What Can Benton County's Lead Data Tell Me About My Tap Water?

Government sampling from Bentonville Water Utilities, which serves Benton County, Arkansas, reports a 90th percentile lead level of 0.001 mg/L as of December 31, 2025. This figure reflects lead from a broad range of household plumbing and water fixtures, not just the source water. It is important to understand that public water system data provides a snapshot of conditions across many homes and does not reveal the lead concentration in your own water supply. The only way to know your home's specific lead level is through certified laboratory testing of your tap water.

Why Are Aesthetic Secondary Standards Different From Health-Based Limits for Lead?

Lead is regulated by health-based standards focused on safe drinking water. These differ from secondary standards that address aesthetic factors like taste or discoloration. While aesthetic concerns might influence your water experience, they do not indicate safety or health risks regarding lead. The Bentonville system has recorded no EPA health-based violations related to lead, demonstrating compliance with primary drinking water safety requirements.

How Does Household Size or Property Use Affect Lead Concerns?

Lead levels in water can vary between single-family homes, large households, second homes, or seasonal properties due to differences in plumbing materials, water usage patterns, and stagnation times. Longer periods of water sitting in pipes, common in seasonal homes or seldom-used taps, may increase lead leaching. This variability means individual testing is crucial for understanding exposure risks in your specific household situation.

What Does a Certified Laboratory Test for Lead Show, and How Should I Interpret It?

A certified laboratory test measures the concentration of lead in your water sample, typically reported in milligrams per liter (mg/L). Results help determine whether your water aligns with federal safety standards or if mitigation steps are advisable. Since lead contamination often arises from plumbing materials, testing at multiple points in your home can provide valuable insight for targeted action.

How Can Lead Enter Benton County’s Water Supply or Distribution System?

Bentonville Water Utilities sources its water from surface water, which generally contains very low lead levels. However, lead can enter drinking water after treatment through corrosion of household plumbing components, like pipes, fixtures, and solder. The distribution system’s water chemistry and system maintenance practices influence this leaching process. Understanding this pathway highlights the importance of looking beyond source water quality when assessing lead exposure.

What Does the Measured Lead Level Mean Compared to Federal Standards, and What Doesn’t It Tell Me?

The 90th percentile lead measurement reported by Bentonville Water Utilities is far below the EPA action level for lead in drinking water. This indicates that most sampled homes had lead concentrations well within the safety guidelines at the time of sampling. However, this summary statistic does not predict individual household exposures or account for plumbing variations. Residents should consider personal testing to make informed decisions about water treatment needs.

In summary, Benton County's public water system lead data confirms compliance with federal health standards but cannot define any one home's water quality. Obtaining a certified laboratory test for your household tap water is essential to understand specific lead levels. To help reduce lead exposure in your water, the C-Series Lead in Water Filter ships ready to configure and offers a targeted solution for residential lead reduction.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2025-12-31. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA SDWIS record for BENTONVILLE WATER UTILITIES (AR0000041), surface water supply, serving 51250 people: 0 health-based violations of 0 total; lead 90th percentile 0.001 mg/L