delÂ·eÂ·teÂ·riÂ·ous. adj. Having a harmful effect; injurious: the deleterious effects of smoking.
Portage is a city in Kalamazoo County in the U.S. state of Michigan. The population was 46,292 in the 2010 census. It is the smaller of the two main cities included in the Kalamazoo-Portage Metropolitan Statistical Area, which has a population of 326,589 as of 2010. Portage is adjacent to the southern boundary of the City of Kalamazoo.
Grand Traverse County is a county located in the U.S. state of Michigan. As of the 2010 census, the population was 86,986. The county seat is Traverse City. According to the United States Census Bureau, it is estimated that the population of Grand Traverse County in July 2015 was 91,636.