PFAS in Barnes County Water: Understanding UCMR5 Sampling and Decision Factors for Valley City Homes
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If You Compare UCMR5 to Earlier UCMR3 PFAS Monitoring Results
The UCMR5 program currently surveying the Valley City City of public water system (ND0200958) covers a broader range of PFAS compounds than UCMR3 did. While earlier monitoring focused mainly on PFOA and PFOS, UCMR5 tests for additional substances such as PFHxS, PFNA, HFPO-DA, PFBS, PFHxA, PFPeA, PFBA, and PFHpA, all at detection limits near or below parts per trillion (nanograms per litre) levels.
Results from four sampling rounds between January 2024 and March 2025 in Valley City show no detections above reporting levels for all these compounds. The federal maximum contaminant levels (MCLs) established for 2024 range from 4.0 ng/L for PFOA and PFOS up to 10 ng/L for other PFAS, and no samples exceeded these MCLs. This wider scope and sensitivity of UCMR5 provide a more comprehensive profile of fluorinated compounds in the public water system compared to UCMR3.
If You Consider the Hazard Index for Newer PFAS Mixtures Without Assuming Health Risk
Scientists use a concept called the hazard index to estimate the combined potential effect of multiple PFAS compounds in water, including newer or less-studied fluorinated substances. While the Valley City system data show no measurable PFAS above reporting levels, understanding relative concentrations in mixtures helps guide technology choices.
The hazard index sums the ratios of concentration to MCL for each compound, but here the measured values were all below reporting thresholds, indicating that any combined presence is well under federal limits. This approach provides context without making claims about safety or risk, helping households weigh treatment options based on documented contamination profiles.
If You Want to Compare Valley City's PFAS Data with Nearby Counties
Valley City's PFAS sampling results are part of a larger regional picture. Comparing these findings with neighbouring Barnes County areas or other counties in North Dakota can highlight consistent absence or presence of per- and polyfluoroalkyl substances. However, differences in source water, treatment methods, and monitoring frequency mean direct comparisons require caution.
For example, detection or non-detection in adjacent counties does not translate to individual household water quality in Valley City, as monitoring pertains only to public system source water. Therefore, testing your own home's water remains essential to confirm your specific conditions instead of relying solely on regional data.
If You Examine Potential Sources Like Firefighting Foam, Textile Finishing, and Landfills in the Region
Valley City’s public water supply draws from surface water sources. Common PFAS sources in other parts of the country include firefighting foam used at airports or fire training sites, industrial uses such as textile finishing, and leachate from landfills. The current UCMR5 data for Valley City show no detectable PFAS compounds above reporting levels, suggesting these sources are not significantly impacting the system’s water.
Understanding local industrial and environmental factors can help homeowners evaluate whether targeted treatment for 'forever chemicals' is advisable. Since no PFAS contamination is evident from the public water system record, additional home water testing is recommended to identify any unique household exposure.
If You Receive a Certified Laboratory Test Report for PFAS in Your Home Water
A certified laboratory report for PFAS in well or tap water lists individual compound concentrations in nanograms per litre (ng/L or parts per trillion). It indicates whether compounds like PFOA, PFOS, PFHxS, and others are detected above the lab’s reporting limits. Unlike federal monitoring programs, these tests assess water from a specific source and plumbing system.
Reading such a report involves noting which PFAS are detected, their levels relative to the 2024 federal MCLs, and whether any exceed those thresholds. This personalized data provides the basis for deciding on treatment options, including specialized filtration systems. The Pentair PFAS Forever Chemicals Filter ships ready to configure and is designed to reduce a wide range of PFAS compounds once present.
In summary, Valley City’s municipal water system shows no PFAS detected above reporting levels across multiple compounds in the 2023-2025 UCMR5 survey. The broader scope of this survey compared to earlier ones, the hazard index concept for mixtures, and regional comparisons provide useful context without implying risk to household water. Understanding environmental PFAS sources and reviewing individual lab results are key steps before selecting the Pentair PFAS Forever Chemicals Filter or other treatment measures.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2025-03-12. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR5 monitoring (2023-2025) for VALLEY CITY CITY OF (ND0200958), ND: 40 results across 10 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level