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Committee reviews USGS groundwater-monitoring contract and proposed PFAS/microplastics study

5790030 · September 3, 2025
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Summary

Planning & Development outlined a USGS groundwater-well monitoring contract renewal and a proposed two-year PFAS and microplastics follow-up study; committee members asked clarifying questions about costs, sampling cadence and public access to results.

McHenry County Planning & Development reviewed a USGS contract renewal for the county groundwater-well monitoring network and a proposed two-year study that would re-test wells for PFAS and add microplastics sampling, with staff answering committee questions about scope, cadence and cost.

Adam said the USGS contract would continue the county’s long-standing groundwater monitoring program, which provides near-real-time water-level data and decadal chemical sampling. He described the USGS system as recording data at frequent intervals and making it available on a public website: “They've got every 10 minutes over the last 15 years of groundwater data,” Adam said.

The USGS renewal included a $2,500 annual…

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