Fleck PFAS Forever Chemicals Filter

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Public Water System Records Compared to Private Well Testing

Government records for the Rochester, MN public water system serving Olmsted County provide data collected through systematic sampling of groundwater sources. These results reflect water quality at the system level, covering 42,243 connections and a population of over 120,000, rather than measurements from individual household taps or private wells. Such data show detections of PFAS substances, including PFOA, PFOS, and others, measured at or below federal standards but do not represent specific conditions in any one home. In contrast, private well testing is necessary to determine actual PFAS concentrations at a home's point of use after water passes through plumbing and treatment equipment.

Steps to Rule Out PFAS Concerns: From Simple Checks to Laboratory Analysis

When facing equipment failure and suspecting PFAS issues, start with straightforward observations such as changes in taste or appearance, though PFAS are often colorless and tasteless. The next step is professional laboratory testing of water samples from your specific well or tap. Testing focuses on PFAS analytes regulated under the EPA's current federal maximum contaminant levels, including PFOA, PFOS, PFHxS, PFNA, and others. Confirming concentrations in your specific water, especially if treatment equipment no longer functions, is essential to selecting the right water treatment technology.

How Plumbing Material and Age Affect PFAS Results Independently of Source Water

The materials used in household plumbing and the age of pipes can influence water quality in ways that are independent from source water PFAS levels. Though PFAS are stable and unlikely to originate from plumbing materials, older pipes may accumulate residues or interact with other compounds affecting overall water quality. Therefore, understanding plumbing conditions helps differentiate source water contamination from secondary influences when interpreting laboratory results and planning treatment.

Interpreting Median and Detection Range in This System’s PFAS Data

In the Rochester public system's monitoring data, PFHxS was detected in 2 out of 60 samples slightly above the reporting level but well below the federal maximum contaminant level. The median of detected PFHxS values was 0.0034 µg/L, and the highest detected value was 0.0039 µg/L, below the 0.01 µg/L federal limit. Other PFAS like PFOA and PFOS were not detected above reporting levels. These figures indicate trace presence without regulatory exceedance, but individual household values may differ and require specific testing to confirm.

Sample Size and Its Impact on Data Reliability

The system data is based on 60 samples taken from the area served, providing a reasonably robust overview of water quality trends within the public supply. However, a limited number of positive detections means the data captures relatively low-level PFAS occurrences. For homeowners, this sample size is sufficient to indicate system-wide concentrations but insufficient for determining conditions in a single household pipe or well. This underscores the importance of dedicated water sampling for individual residences, particularly after treatment system failures.

Influence of Sample Depth, Well Depth, and Source Type on PFAS Expectations

Given that the Rochester water system uses groundwater sources, PFAS levels reflect what is present in aquifers accessed by municipal wells. Variations in well depth and water table conditions can affect constituent concentrations. Private wells that tap shallower or different groundwater zones may have different PFAS profiles than those documented by the public system, and surface water sources generally differ as well. Understanding the source water type and well characteristics is critical for anticipating potential PFAS presence at the household level.

In summary, the EPA’s public water system record for Rochester, MN reports no health-based violations for PFAS and shows detections below federal maximum contaminant levels from 2023 to early 2024. These data represent groundwater sources used by the municipal supply in Olmsted County and do not describe individual household water. Homeowners with equipment that has failed and suspect PFAS should obtain laboratory testing of their specific water to assess concentrations accurately. For direct treatment, the Fleck PFAS Forever Chemicals Filter ships ready to configure for household use and is designed to address PFAS compounds documented in such systems. For further details, visit the EPA’s Safe Drinking Water Information System (SDWIS) public database.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2024-02-22. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR5 monitoring (2023-2025) for Rochester, MN (MN1550010), MN: 600 results across 10 listed contaminants, 2 detections above the reporting level; compared with the applicable federal MCL, none above