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 Rapids is a city in the U.S. state of Michigan. The city is located on the Grand River about 40 miles east of Lake Michigan. As of the 2010 census, the city population was 188,040. In 2010, the Grand Rapids metropolitan area had a population of 774,160 and a combined statistical area, Grand Rapids-Muskegon-Holland, population of 1,321,557. It is the county seat of Kent County, Michigan, second largest city in Michigan (after Detroit), and the largest city in West Michigan.