Jump to main content or area navigation.

Contact Us

Waste and Cleanup Risk Assessment

Superfund Risk Assessment: Ecological: Risk Characterization

View resources related to this topic from other Waste and Cleanup Risk Assessment Programs:
(note - programs not linked do not have content for this topic)

Chemical Accident Prevention

Federal Facilities Restoration and Reuse

Underground Storage Tanks

Resource and Conservation Recovery Act


Additional Superfund Information:

Superfund Home Page

Superfund Publications

Superfund Laws, Policies, and Guidances

Superfund Sites

Risk Characterization is the analysis and integration of information gathered during the risk assessment process into a summary and description of the data and risks associated with the site.

Documents | EPA Links | External Links


  1. EPA Guiding Principles on Monte Carlo Analysis
  2. EPA's Science Policy Council web page on Risk Characterization
  3. EPA's 1992 Guidance on Risk Characterization
  4. EPA Risk Characterization Program (PDF) (10 pp, 4,835K, About PDF)
  5. Risk Characterization Memo - Implementing the Administrator's Risk Characterization Memorandum (PDF)(4 pp, 1,800K, About PDF)
  6. Risk Assessment Guidance for Superfund (RAGS) Part A: Risk Characterization (PDF)(22 pp, 912K, About PDF)
  7. Risk Assessment Guidance for Superfund (RAGS) Part A: Risk Characterization Exhibits (PDF)(9 pp, 1.5 mb, About PDF)
  8. Superfund guidance (RAGS Volume III)

Top of page

EPA Links

No EPA links available

Top of page

External Links

  1. Spatial Analysis and Decision AssistanceLink to EPA's External Link Disclaimer
    Spatial Analysis and Decision Assistance is a freeware program developed at the University of Tennessee with funding from EPA, NRC, and DOE that provides comprehensive risk assessment tools in a spatial modeling environment. Risk assessors can use SADA to perform traditional risk assessment PRG calculations, PRG screens, and forward human health calculations for one or more contaminants. Users have complete control over all toxicological data, physical properties, and landuse/pathway exposure parameters to create site specific risk assessments. In addition, the risk models are integrated with SADA's spatial analysis tools, decision frameworks,and sample design strategies allowing users drive a risk based characterization from a preliminary initial sample design through a final feasibility study. In addition, SADA allows users to import their own site or region specific screening or decision threshold values separately from SADA's own risk modeling tools.

OSWER Home | Waste and Cleanup Risk Assessment Home

Jump to main content.