Any individual or facility that possesses 10,000 lb. or more or more of ammonia (anhydrous)—expected to be less than 10% water—must report their chemical holdings to DHS. DHS regulates security at high-risk chemical facilities under the Chemical Facility Anti-Terrorism Standards (CFATS) program (6 CFR Part 27). CFATS ensures high-risk facilities have security measures in place to reduce the security risks of certain chemicals that DHS has designated as “chemicals of interest” (COI).