delÂ·eÂ·teÂ·riÂ·ous. adj. Having a harmful effect; injurious: the deleterious effects of smoking.
Portage Info. Portage, Michigan is located in Kalamazoo County. Zip codes in Portage, MI include 49081, 49002, and 49024. The median home price in Portage is $188,900 which is roughly $101/per square foot. More Portage information.
Portage Lake is located along Maine State Route 11, which runs north-south and is the only state road in town. The town is located south of Fort Kent and west of both Caribou and Presque Isle, which are the closest commercial centers.