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
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.