Welcome to DOE's Reportable Quantity (RQ) Calculator. Enter the name of a hazardous substance or its Chemical Abstract Service registry number (CASRN) in the field above to look up its RQ or to evaluate whether a release to the environment must be reported to the National Response Center. If you misspell the name of the substance, the RQ Calculator will return a list of possible alternatives.

Please see our disclaimer before using the RQ Calculator.

Currently running Version 4.3 (Updated 12/06/24). The updated list of radionuclides found in Appendix B to Section 302.4, added in December 2023, is not yet reflected in the RQ Calculator. EHSS-21 is working to add these radionuclides.

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