CHEMICAL PROFILES|Ranking Systems in Scorecard

Scorecard includes five different hazard ranking systems that can be used to compare chemical impacts on human health, ecological health, and environmental health generally.

Reviewing the results of multiple rankings systems is helpful in forming a judgment about the overall hazard posed by a toxic chemical, because the systems differ in what they consider important for comparing chemicals. For example, systems in Scorecard assign human health rankings based on chronic health concerns only, on acute and chronic health concerns combined, and on both toxicity and exposure potential. One system assigns different rankings based on route of exposure (inhalation or ingestion), and another different rankings for cancer and noncancer hazards.

The five systems included in Scorecard are:

(1) the Environmental Defense Risk Scoring System,
(2) the Indiana Pollution Prevention and Safe Materials Institute's Pollution Prevention Progress Measurement Method,
(3) the University of Tennessee's Center for Clean Products and Clean Technologies Hazard Evaluation System,
(4) the U.S. EPA's Risk-Screening Environmental Indicators Model,and
(5) the U.S. EPA's Waste Minimization Prioritization Tool.

Note that each of these ranking systems typically assigns several scores to a chemical. A thoroughly evaluated chemical can have as many as twelve different ranking scores, but these systems have not ranked all chemicals in Scorecard, so many specific chemical profiles may have few or no ranking scores.