Sixty scats (feces) from coyotes (Canis latrans) were collected during the spring of 1976 from these locations on the U.S. Department of Energy Hanford Reservation in south central Washington. Only 5 of the 60 scats had detectable 137Cs activity levels. All scats had measurable 90Sr activity levels. Scats collected close to nuclear waste burial sites had the highest levels of radioactivity, and scats collected the greatest distance from the waste burial sites had the lowest levels. Coyotes are potential dispersers of radioactivity, and surveillance of coyote scats can be useful adjunct to radiobiological monitoring procedures.