Department of Toxic Substances Control Department of Toxic Substances Control

How to Contact DTSC

Report an Environmental Concern

If you can't find the answer to your question on our website, or want to walk through regulatory requirements with a live person, our Regulatory Assistance Officers will be able to help.  Call (800) 72TOXIC - that's (800) 728-6942. From outside California, call (916) 324-2439. Don't be put off by getting voice mail - you will hear from one of them within 2 to 3 business days.

At DTSC, we are committed to being honest, open, responsive, and direct with the public. The links below direct you to various means of giving us your feedback.

  • We are interested in hearing about your experiences with DTSC, both positive and negative. Please take a moment to complete a Cal/EPA Customer Survey Form, either on line or by using a printable form.
  • We want to continue to improve our website, and your comments are an important part of doing that. Send your comments and suggestions in an e-mail to the DTSC Web Coordinator at