Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

JavaScript appears to be disabled on this computer. Please click here to see any active alerts.

Revised Assessment Guidance for Perchlorate

The recommended preliminary remediation goal for perchlorate when making site-specific cleanup decisions where there is an actual or potential drinking water exposure pathway.

Revised Assessment Guidance for Perchlorate (pdf) (83.02 KB)

Revised Assessment Guidance for Perchlorate

Cleanups at Federal Facilities