Arctic Brook is located in the City of Bangor, Maine. The stream begins in a forested wetland above Grandview Avenue. The stream flows south from Grandview Avenue, under the Broadway Shopping Center, under Route 15 (Broadway) and Interstate 95, and into Kenduskeag Stream just below Valley Avenue, a distance of 1.4 miles. The Arctic Brook watershed covers 1.2 square miles (768 acres) consisting of a mix of forest, medium and high-density residential development and commercially developed areas including the Broadway Shopping Center, Bangor High School, a City Recreational Forest (Prentiss Woods), several churches, and two private schools.
The water quality of Arctic Brook has been assessed by the Maine Department of Environmental Protection (DEP), and determined not to meeting state water quality standards for aquatic life use. The stream was consequently listed on the State's 303(d) list of impaired waters in 2002. The cause of impairment has been indicated by Maine DEP to be linked to the high amount of impervious cover in the watershed.