Paul Price

PhD, MSc, BA, AA

Exposure Assessor, Chemist, Risk Assessor


Paul Price

PhD, MSc, BA, AA
Exposure Assessor, Chemist, Risk Assessor
Country of Residence
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Current Professional Activities

Dr. Paul Price is an exposure and risk assessor who has recently retired from the Office of Research and Development of the U.S. Environmental Protection Agency. He is an adjunct professor at the University of Iowa and a frequent guest lecturer. Dr. Price is active in the area of mixtures risk assessment. He is president of the Mixtures Specialty Section of the Society of Toxicology and has recently given a continuing education course on risks from combined exposures. Dr. Price serves on the European Food Safety Authority’s committee on risks from combined exposures. He was an invited speaker for the 2022 “ONE conference” in Brussels. Dr. Price is currently working on multiple publications on mixture risk assessment and the Mixture Adjustment Factor.

Professional Experience

In his 45 years of being an exposure and risk assessor, Dr. Price has had experience with a wide range of organizations including, State and Federal governments, trade associations, large chemical manufactures, and non-profit research organizations. He has served on both national and international committees on chemicals risks. Dr. Price has worked at the United States Environmental Protection Agency as both a regulator and as a research scientist. He has been a senior scientist at The Dow Chemical Company and the American Petroleum Institute. Dr. Price is the co-founder of The LifeLine Group, a nonprofit organization that produced publicly available software for assessing aggregate exposures to pesticides and industrial chemicals. He is a charter member of the Society of Risk Analysis and the International Society for Exposure Science and a long-term member of the Society of Toxicology. For the last fifteen years Dr. Price has been investigating mixture risk assessments and how advances in single chemical exposure and risk assessment can improve such assessments.

Dr. Price is the author of more than ninety papers and book chapters. His published work includes pure and applied research, use of science in regulatory affairs, and policy analysis. Areas of research include the integration of mechanistic toxicity and exposure data into chemical risk assessments and the determination of characterizing variation in aggregate and cumulative exposures from near- and far-field sources using probabilistic models. His work has involved the assessment of solvents and other industrial chemicals, pesticides, and chemicals in consumer products. Recent publications include investigations on the use of value of information and cost effectiveness techniques to select preferred toxicity tests, development of an ontology for chemical interactions using the AOP, using agent-based models to predict long-term patterns in exposure related human behaviors, and determining if characteristics of single chemical exposures can predict when mixtures are a concern.

Academia, Publishing, Awards


  • Society of Toxicology award for the outstanding paper in the field of biological modeling (2012 and 2019)
  • Society of Toxicology award for the outstanding paper in the field of risk assessment (1997 and 2016)
  • Society of Toxicology award for the best poster in the field of mixture toxicology (2017)
  • Society of Toxicology award for the best poster in the field of Risk Assessment toxicology (1996)
  • Society of Toxicology award for the top-ten poster in the field of risk assessment (1996, 2011, 2014, and 2016)
  • Society of Toxicology award for the top-five poster in the field of mixture toxicology (2016)
  • EPA Bronze Medal 1982
  • EPA Bronze Medal 1987
  • EPA Bronze Medal 2015

Federal and international committees

  • European Food Safety Authority, MIXTOX working group (ongoing). Provided comments and suggestions to EFSA on a guidance document “Guidance document on harmonised methodologies for human health, animal health and ecological risk assessment of combined exposure to multiple chemicals.” Currently working on definitions of assessment groups in mixture risk assessment.
  • EPA government liaison for the ILSI North America Food and Chemical Safety Committee (2018-2020). Identify emerging scientific issues and to recommend research programs to facilitate and promote food and chemical safety. Assist in establishing research priorities, evaluating proposals, and reviewing and critiquing manuscripts.
  • Organisation for Economic Co-operation and Development, Work group on cumulative exposures to chemicals (2015-2018). Part of EPA’s team for reviewing and commenting on the OECD project to create guidance on mixture risks.
  • American Chemistry Council, Long Range Research Initiative Board (2012-2014). Dow Chemical’s representative to board directing ten-million-dollar annual research fund.
  • ILSI-HESI workgroup on mixtures, synergy, use of the TTC. (2008-2010). Group performed major literature review of chemical synergy and develop an approach for using the TTC in mixture risk assessments as a tier 0 approach.
  • EPA-Army Corps of Engineers external peer review of the HARS risk assessment (2002-2003). This two-year appointment required a review of the human and ecological risks associated with the placement of remediation materials at the Historic Area Remediation Site (HARS) in New York Harbor.
  • EPA external peer review of RAGS guidance on the use of probabilistic models (2000) Served as chair of human health subcommittee of the external peer review panel for proposed guidance on the use of Monte Carlo modeling in the assessment of exposures at Superfund sites.
  • Member of State of California risk assessment advisory committee (1996-7). Exposure assessment subcommittee. Reviewed and prepared written comments on all interim and final reports.

Role at RSI

Paul Price is an Associate Expert with Risk Sciences International