An official website of the United States government.

Benchmark Dose Tools

Contact Us About Benchmark Dose Tools

Report an environmental violation

Report possible violations of environmental laws and regulations.

EPA welcomes your comments, especially comments on how we can improve our website. We strive to respond to every comment with an answer or an appropriate referral as quickly as possible. 

Technical Support

Contact BMDS Support for problems or questions on using BMDS or CatReg, or to report broken links or other issues related to the web site.

Mailing List

Join the mailing list to receive news on the latest updates to BMDS and CatReg, training opportunities, and more. The list is low-traffic (about 6-8 announcements a year). You can view all previous announcements sent to the list.