County well-testing finds modest nitrate exceedances, widespread hard water

Jun 29, 2026

A county presentation on a Driftless Area Water Study reported that about 163 Vernon County private wells were tested: roughly 5% exceeded the nitrate health standard, about 82% had hard water, iron caused aesthetic problems for roughly 16% of participants, and bacteria positives were low overall.

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A presenter for the Driftless Area Water Study told the Vernon County Board that about 163 residents in the county had private wells tested for 22 common water-quality indicators as part of a regional effort.

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