Fleck PFAS Forever Chemicals Filter

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Granular Carbon Beds Versus Ion-Exchange Resins for PFAS Treatment

When addressing PFAS—per- and polyfluoroalkyl substances—in residential water, two common technologies come into play: granular activated carbon beds and ion-exchange resins. Granular carbon acts by adsorbing fluorinated compounds onto a porous surface, effectively reducing several types of these "forever chemicals." Ion-exchange resins, on the other hand, exchange ions in water to selectively remove PFAS molecules, often showing effectiveness for different PFAS chain lengths. The documented Fleck System technology employs a combination designed to target a broad range of PFAS compounds, enhancing overall treatment capability compared to either method alone.

Firefighting Foam, Textile Finishing, and Landfill Sources: Relevance to the Spearfish Area

Regional water quality reflects local industrial and environmental factors. Common PFAS contributors nationwide include firefighting foams, textile finishing operations, and landfills. In the Spearfish public water system—which relies on groundwater—the 2023–2025 EPA Unregulated Contaminant Monitoring Rule (UCMR5) detected no PFAS compounds above reporting levels for samples taken across 14 monitoring events. This absence of detection suggests that major PFAS sources tied to these activities may not be impacting Spearfish’s drinking water supply at measurable levels during this period.

Long-Term Effects of Untreated PFAS in Household Water

Without specific testing, the presence of PFAS in individual household water cannot be assumed based on regional data alone. However, when PFAS are present above certain levels in water, evidence indicates these synthetic fluorinated compounds can accumulate in the human body over time. While Spearfish public system records show no PFAS detections above reporting thresholds, residences with private wells or faulty equipment may experience different conditions. Untreated PFAS exposure has been associated with various potential health concerns according to ongoing research, but regional system data does not indicate a health-based violation or unsafe conditions.

Sample Size and Interpretation: Understanding the Spearfish PFAS Data

The water system’s PFAS testing includes 14 samples collected between March and September 2025, representing a moderate sample set focused on the municipal groundwater source. While these samples provide a snapshot for the public system, they do not capture every possible variation, such as private well conditions or changes over time. The small sample size means results are best seen as indicative for the public water supply as a whole rather than definitive for every location or tap within Spearfish.

Differences Between Public Water System Records and Private Well Testing

Public system monitoring covers overall water quality for the distribution network supplying many homes and businesses in Spearfish, serving over 13,800 people. These records provide data on water leaving the treatment plant or entering the distribution system, not water at individual homes. By contrast, private wells draw directly from local groundwater and can vary widely in contaminants. Testing a private well for PFAS requires an individual certified laboratory analysis to determine specific concentrations, which public system records cannot substitute or guarantee.

Certified Laboratory Testing for PFAS: How to Understand Your Results

A certified laboratory test for PFAS measures concentrations of multiple fluorinated compounds—like PFOA, PFOS, PFHxS, PFNA, and others—in nanograms per liter (ng/L), also known as parts per trillion (ppt). Results report detected levels relative to reporting limits and federal maximum contaminant levels (MCLs). In Spearfish’s public system, no measurements have exceeded these MCLs. Interpretation requires noting whether results are above detection thresholds and comparing them against health-based standards to understand potential water quality issues specific to your household water.

For homeowners experiencing PFAS concerns, particularly where existing equipment has failed, the Fleck PFAS Forever Chemicals Filter ships ready to configure, combining patented Fleck Technology tailored to reduce a broad spectrum of PFAS compounds based on testing demand figures. This product offers a documented solution aligning with the need to address PFAS in residential water effectively and reliably.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2025-09-09. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR5 monitoring (2023-2025) for SPEARFISH (SD4600311), SD: 140 results across 10 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level