Outdoor residential rodenticide use is restricted to licensed applicators only; homeowners may not apply rodenticides outdoors.

Requires Maine DEP to provide PFAS information to public and private drinking water well owners, with public posting to help owners test, understand risks, and pursue mitigation.

Directs the Department of Marine Resources to compile and submit a report of the Aquaculture Advisory Council's findings and recommendations to guide Maine aquaculture policy.

Expands Maine's energy and water efficiency standards for appliances; DEP will implement and enforce tougher rules to cut energy/water use and lower bills.

Repeals the Yarmouth Water District charter and enacts a modern, clarified charter that reshapes governance, powers, finances, and service area for ratepayers.