In July, the Mill Valley City Council concluded a nearly 18-month process and approved a plan to overhaul its aging sewer system, route: {:controller=>"articles", :action=>"show", :id=>"mill-valley-city-council-makes-sewer-rate-hikes-new-structure-official"} -->. In doing so, the council backed both a multi-year sewer rate increase for residents and businesses, as well as a shift to what city officials say is a more equitable