Contaminants of emerging concern (CEC) are substances and microorganisms including physical, chemical, biological, or radiological materials known or anticipated in the environment, that may pose newly identified risks to human health or the environment. Biological contaminants of emerging concern (BioCECs) are microbial pathogenic agents that may pose newly identified risks to humans through the environment and can occur in vectors, water, soil, waste, or air.
Biological Contaminants of Emerging Concern (BioCEC, 2025) roots itself in the “One Health” framework and provides guidance for states to identify and evaluate the broad range of contaminants and pathogens covered by the term BioCEC. It is important to note that this recent guidance is not comprehensive and will not identify specific risks, as biological contaminants of emerging concern are diverse and their risks vary. This guidance can, however, aid entities as they assess the risk for their unique circumstances and improve their decision-making.
The related Contaminants of Emerging Concern Framework (CEC-1, 2023) includes a white paper and four fact sheets on the broader group of contaminants of emerging concern, including physical, chemical, biological, and radiological materials.
Topic(s): Contaminants of Emerging Concern, Human Health, Risk Assessment
