PFAS entry-point sampling reported in Marathon City packet; three analytes detected at ‘J’ qualifier

Oct 23, 2026

Lab results for Oct. 13, 2026 entry-point PFAS sampling showed detections flagged as J (between detection and quantitation limits) for PFHxS (1.2 J ng/L), PFOA (0.93 J ng/L) and PFOS (1.0 J ng/L); the packet included the lab report and a note that results would be explained at the meeting.

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The packet included Northern Lake Service, Inc.’s laboratory report for PFAS entry-point sampling collected Oct. 13, 2026 under the Wisconsin DNR routine monitoring requirements. The lab report lists method EPA 537.1 and shows three PFAS analytes with reported values flagged “J,” indicating results between the method limit of detection and limit of quantitation: perfluorohexanesulfonic acid (PFHxS) at 1.2 J ng/L, perfluorooctanoic acid (PFOA) at 0.93 J ng/L, and perfluorooctanesulfonic acid (PFOS) at 1.0 J ng/L.

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