Sherwood advances MIEX water‑treatment pilot, searches for Well #7 amid system upgrades
July 07, 2026 | Sherwood, Calumet County, Wisconsin
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Sherwood’s utility officials moved forward on several water‑system issues in 2006: a MIEX pilot to reduce total organic carbon (TOC) and sulfides, search for a dependable Well #7 site, a temporary acid feed installation at Well #5, and extension of the STH‑114 water main.
MIEX pilot: McMahon Associates and contract operator Midwest Contract Operations ran a MIEX ion‑exchange pilot in May to assess removal of TOC and sulfides. Preliminary results cited in board materials reported roughly 90% TOC removal in some runs; technical interruptions extended the test schedule and a final report was expected after additional analysis. Commissioners discussed pilot configurations and recommended an "800" design for future work pending DNR discussions.
Wells and treatment: Engineer Gary Rosenbeck and Van Lieshout reported test‑well quotes and drilling plans for potential Well #7 sites; one test site was temporarily inaccessible due to wet ground conditions and drilling delays pushed property closing dates tied to the well purchase. The utility also pursued a temporary acid feed at Well #5 to reduce raw water pH to the aerator and examined MIEX/ozone combinations.
Distribution upgrades: The board approved the STH‑114 water main extension and certified partial payments to contractors; utility staff and engineers discussed a proposed 12‑inch force main from Lift Station 3 to the wastewater treatment plant to alleviate future capacity issues. Commissioners also approved limited chemical additions (ferrous chloride) at the High Cliff lift station to address odors and headworks heating/ventilation upgrades were previously approved.
Why it matters: The measures aim to improve water quality and system reliability as Sherwood grows. Pilots and force‑main planning are forward‑looking engineering steps; test‑well results and regulatory approvals will determine long‑term paths and funding needs.
Next steps: Final MIEX pilot reporting, DNR approvals for pilot scale changes, continued testing at potential Well #7 sites, and engineering proposals for the force main were identified as upcoming actions.
MIEX pilot: McMahon Associates and contract operator Midwest Contract Operations ran a MIEX ion‑exchange pilot in May to assess removal of TOC and sulfides. Preliminary results cited in board materials reported roughly 90% TOC removal in some runs; technical interruptions extended the test schedule and a final report was expected after additional analysis. Commissioners discussed pilot configurations and recommended an "800" design for future work pending DNR discussions.
Wells and treatment: Engineer Gary Rosenbeck and Van Lieshout reported test‑well quotes and drilling plans for potential Well #7 sites; one test site was temporarily inaccessible due to wet ground conditions and drilling delays pushed property closing dates tied to the well purchase. The utility also pursued a temporary acid feed at Well #5 to reduce raw water pH to the aerator and examined MIEX/ozone combinations.
Distribution upgrades: The board approved the STH‑114 water main extension and certified partial payments to contractors; utility staff and engineers discussed a proposed 12‑inch force main from Lift Station 3 to the wastewater treatment plant to alleviate future capacity issues. Commissioners also approved limited chemical additions (ferrous chloride) at the High Cliff lift station to address odors and headworks heating/ventilation upgrades were previously approved.
Why it matters: The measures aim to improve water quality and system reliability as Sherwood grows. Pilots and force‑main planning are forward‑looking engineering steps; test‑well results and regulatory approvals will determine long‑term paths and funding needs.
Next steps: Final MIEX pilot reporting, DNR approvals for pilot scale changes, continued testing at potential Well #7 sites, and engineering proposals for the force main were identified as upcoming actions.
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