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 This website is no longer updated and links to external websites and some internal pages may not work.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

Hazardous Waste

Documents Related to the Hazardous Waste Listing of Dyes and Pigments

The nonwastewater streams generated from the production of specific dyes, pigments, food, drug and cosmetic colorants were added as listed hazardous waste, K181. The rule has a threshold level for constituents of concern (e.g., aniline levels below 9300 kg/yr) over which the waste must be managed as hazardous. In addition, waste sent for disposal in landfills meeting specific design standards is exempt from hazardous waste management.

The proposed and final rules as well as a fact sheet about the final rule can be found below:

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.