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 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 This website is no longer updated and links to external websites and some internal pages may not work.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 »

Chemicals subject to reporting (EPCRA Section 304)

What chemicals are subject to reporting under EPCRA Section 304?

Chemicals subject to Section 304 notification requirements are CERCLA hazardous substances listed under 40 CFR Table 302.4 and the extremely hazardous substances listed under 40 CFR part 355 Appendix A and B.