Arsenic, nitrate, iron, and hardness in well water are concerns of homeowners and planners in the Fairbanks North Star Borough, Alaska. Arsenic and nitrate in water may affect human health. Iron and hardness can be aesthetically objectionable, impair plumbing systems, and discolor plumbing fixtures. This report is a compilation of the arsenic, nitrate, iron, and hardness data collected through February 1983 in the Goldstream Road, Murphy Dome Road, and Yankovich-Miller Hill Road areas of Fairbanks. Within these areas, concentrations of arsenic ranged from 0 to 1600 micrograms per liter, nitrate (as nitrogen) ranged from 0 to 78 milligrams per liter, iron ranged from 0 to 46 milligrams per liter, and hardness (as calcium carbonate) ranged from 34 to 1220 milligrams per liter.