County adds $6 annual septic maintenance fee; ordinance amended after split vote

Sep 18, 2025

Marathon County amended its on-site wastewater ordinance (chapter 15) to update statutory references and clarify septic/privy requirements and passed a $6 annual fee to fund the county septic maintenance program; the fee was separated from other amendments and passed by the board but not unanimously.

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The Marathon County Board of Supervisors approved multiple amendments to chapter 15 of the county code to update statutory references, clarify that structures intended for human habitation must have a septic plan, and to add a $6 special charge on property tax bills for properties with private on-site wastewater systems to fund the county’s maintenance program.

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