This page is being updated.
Thank you for your interest in this topic. We are currently updating our website to reflect EPA's priorities under the leadership of President Trump and Administrator Pruitt. If you're looking for an archived version of this page, you can find it on the January 19 snapshot.
Other ways to help you find what you are looking for:
- Use our advanced search page
- Browse our curated A-Z index of terms and topics or see our automated list of website topics
- Search frequently asked questions or submit a question
- See January 19, 2017 Web Snapshot
- Go to the EPA home page
- To report problems with our website, or to suggest improvements to our website, please use the "Contact Us" link on the page where you see a problem, or where you would like to suggest an improvement. This link is located at the upper right and bottom of each web page.
You can also search our site.