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Howard S. Ramsdell, PhD.


Associate Professor Environmental and Radiological Health Sciences

Contact Info

Phone: (970) 491-5698   Office: 236 Physiology

Email:   Lab:


Fields of Expertise

1.) Toxicology and Microbiology

Areas of Interest

 Aquatic toxicologyBiochemical toxicologyContaminant fate and transportRisk assessmentWildlife toxicology


Dr. Ramsdell is an environmental toxicologist with a strong interest in exposure assessment.

Dr. Ramsdell's research projects have included field and laboratory studies of wildlife species (fish, mammals, birds, frogs) and humans potentially exposed to toxic environmental contaminants. He is interested in the use of planaria (an invertebrate flatworm) as a model for aquatic toxicology studies. Dr. Ramsdell has been involved in investigation of the exposure of livestock to naturally occurring contaminants that originate in ground water but that also appear to have an important pathway through forage consumption.

Dr. Ramsdell teaches a laboratory course on the analysis of trace contaminants in environmental media, an undergraduate course on the transformation and fate of contaminants in the environment, an environmental health risk assessment course, a graduate course on the fate of contaminants in the body and a course for Environmental Health graduate students and Master of Public Health students covering the broad scope of environmental and occupational health sciences. He also teaches water quality analysis in an undergraduate laboratory course.

Dr. Ramsdell earned a B.A. in Chemistry from Pomona College and a Ph.D. in Biochemistry and Biophysics from Oregon State University.