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O'Fallon details $10M reverse-osmosis upgrade and wastewater improvements

City of O'Fallon Public Works / Engineering Meeting · January 21, 2026
AI-Generated Content: All content on this page was generated by AI to highlight key points from the meeting. For complete details and context, we recommend watching the full video. so we can fix them.

Summary

City engineers updated the board on water and wastewater projects including a $10,000,000 RO upgrade (about 15% complete), pre-oxidation design work, sludge-dewatering changes that shifted landfill disposal for biosolids, and several lift-station and clarifier rehab projects.

City engineers briefed the public works board on ongoing water- and sewer-system upgrades, highlighting a major reverse-osmosis (RO) upgrade at the treatment plant, progress on distribution and collection-system projects, and changes to biosolids handling.

Sean, the water and sewer presenter, introduced new project manager Max Hillerman and told the board the RO project — contracted with CAMEX Construction and designed around a selected RO vendor — is a roughly $10,000,000 upgrade and is about 15% complete. He said the vendor and contractor coordination is ongoing to keep equipment delivery and installation on track later in the year.

On distribution work,…

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