Risk Assessment Environmental risk assessment uses facts and assumptions to estimate probability of harm to human health or the environment resulting from exposure to pollutants, toxins, or management decisions Estimates typically based on broad assumptions to ensure a lack of complete knowledge does not result in an underestimation of riskRisk Assessment – Environmental risk assessment Environmental risk assessment uses facts and assumptions to estimate probability of harm to human health or the environment resulting from exposure to pollutants, toxins, or management decisions. ™Estimates typically based on broad assumptions to ensure a lack of complete knowledge does not result in an underestimation of risk