Arsenic in Roane County Water: Understanding Local Aquifer Conditions and Concerns

Arsenic Whole-House Filter

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1. How Public-System Records Differ From Private-Well Testing in What They Establish

Government groundwater sampling in Roane County’s aquifer 317DKRD has measured arsenic in multiple wells across the area. These reports provide an overview of the regional presence of arsenic but do not determine the specific water quality of any individual household well. Your home's water arsenic level depends on your own water source and must be established through a certified laboratory test of your well or tap water.

Public-system records offer valuable context about expected water characteristics in your area. However, they cannot substitute for direct testing of your own water system to understand your exact arsenic concentration.

2. What Distinguishes This Problem From the Two Problems Most Often Confused With It

Arsenic contamination is often confused with aesthetic water issues such as staining or metallic taste caused by other minerals, or with microbial contamination that affects water safety differently. Arsenic is a naturally occurring element that can be present in groundwater, but its presence does not inherently indicate microbial or purely aesthetic problems.

Unlike water hardness or iron content, arsenic requires different testing and treatment methods. Its detection is chemical and not related to water clarity or microbial counts, so addressing arsenic specifically involves unique considerations.

3. How the Documented Treatment Technology Removes or Neutralises the Constituent

To effectively reduce arsenic concentrations in household water, systems like the Fleck Arsenic Filter use targeted filtration technology designed to capture and remove arsenic compounds. This technology works by filtering out arsenic particles from the water as it passes through specialized media, significantly lowering the arsenic content to levels suitable for household use.

The system ships ready to configure within your water setup and is designed to meet the demands of typical household water usage, providing a reliable solution for managing arsenic presence.

4. How the Constituent Enters Groundwater or the Distribution System in This Region

In Roane County’s aquifer 317DKRD, arsenic is naturally present in the bedrock and sediments. It leaches into groundwater through geologic processes over time. Factors such as well depth and aquifer composition influence arsenic concentration in sampled water.

• USGS samples from wells between 71 and 460 feet deep found arsenic in all tested wells.
• Detection levels ranged from 0.37 to 26.4 micrograms per liter, reflecting natural variation.

This occurrence reflects regional geology rather than contamination from surface activities or distribution system crossings.

5. What a Certified Laboratory Test for This Constituent Reports and How to Read It

A certified laboratory test for arsenic in your well water will provide a measurement in micrograms per liter (µg/L or ppb). This number indicates the concentration of arsenic present in your sampled water.

Interpreting this result involves comparing it to applicable federal or state guidelines, but importantly, detection alone is not a violation. The US Environmental Protection Agency’s maximum contaminant level (MCL) for arsenic in public water systems is 10 µg/L—but detection below or even slightly above this level requires a professional understanding.

Your test report will include the sample date, method, and detection limits, helping you assess your unique water quality context.

6. How Sample Depth, Well Depth or Source Type Changes What a Reader Should Expect

Arsenic concentrations can vary significantly depending on how deep a well is drilled and the nature of the aquifer it taps. Shallow wells may encounter different concentrations compared to deep wells due to geochemical layering.

In Roane County, data from wells ranging between 71 and 460 feet depth show variation, indicating that well depth is one factor influencing arsenic levels your water might have. Understanding the depth and source of your water aids in anticipating possible arsenic concentrations and tailoring appropriate water treatment solutions.

For a definitive understanding of your water’s arsenic content and its treatment needs, a certified laboratory water test is essential.

Using the Fleck Arsenic Filter after confirming your water’s arsenic level ensures effective reduction of arsenic, matching your household’s water usage and demand.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2018-07-18. These figures describe groundwater sampled in this area. They are not a test of any individual private well - only a test of that well can establish its own water.

On record: U.S. Geological Survey sampling of Arsenic in the 317DKRD aquifer (Roane County): 4 results from 4 wells, median 12.75 ug/L, range 0.37-26.4 ug/L; none above any federal threshold