An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Superfund

Cleanup Levels for Dioxin at Superfund Sites

On this page:


Regional Screening Levels for Dioxin

This sections includes links to Regional Screening Levels (RSLs) for dioxin pages. Specific resources are provided below. 

  • Regional screening table
    • Default non-cancer and cancer RSLs for dioxin: These RSLs are based on default (i.e. non-adjusted) exposure factors and current cancer and non-cancer toxicity values for 2,3,7,8-tetrachlorodibenzo-para-dioxin (TCDD).
    • Information on site-specific non-cancer and cancer RSLs for dioxin (calculator Exit). This link provides calculations for developing site-specific regional screening levels for dioxin, based on site-specific exposure factors and current cancer and non-cancer toxicity values for.

For a discussion on how screening levels can be used to develop PRGs and ultimately cleanup goals, see Risk Assessments toxicity values for dioxin.

Top of Page


Supporting Documents for Dioxin Soil Cleanup Levels

Provides a review of foreign nations’ evaluation of the toxicity of dioxin and their established concentration values in soil that are intended to provide protection to humans who may be exposed under residential or commercial/industrial land uses.

Top of Page