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Oconomowoc council adopts tighter wellhead protection rules, limits stormwater chemicals
Summary
The Oconomowoc Common Council voted unanimously Jan. 25 to adopt ordinance 25-01074, revising the municipal wellhead protection overlay to require hazardous-chemical inventories, spill-containment and emergency response plans and to limit pond-treatment chemicals to NSF 60–type products for areas that contribute groundwater to city wells.
The Oconomowoc Common Council on Jan. 25 adopted ordinance 25-01074 to revise the city’s wellhead protection overlay area, adding new inventory, spill-containment and emergency-response requirements for hazardous chemicals and restricting chemical treatment of stormwater ponds to NSF 60–type products.
City staff described the changes as targeted protections for shallower, more transmissive aquifers that feed recently developed municipal wells. “The purpose, the goal of a wellhead protection program is to identify, manage and protect the land areas that contribute groundwater to our drinking wells,” said Scott Osborne, a city staff member involved in water-system planning.
The ordinance language, introduced at a public hearing Jan. 25 after a plan-commission recommendation, requires developers and site operators within defined wellhead protection areas to submit hazardous-chemical inventories, spill-containment measures…
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