Keeping hazardous chemicals out of the hands of those who would misuse them is a responsibility the Agency shares with facility owners and operators, employees, and emergency responders.
Appendix A of the Chemical Facility Anti-Terrorism Standards (CFATS) regulation (6 CFR Part 27) lists more than 300 chemicals of interest (COI) and their respective screening threshold quantities (STQ) and concentrations. These COI are categorized under three main security issues:
- Release: Toxic, flammable, or explosive chemicals or materials that can be released at a facility.
- Theft or Diversion: Chemicals or materials that, if stolen or diverted, can be converted into weapons using simple chemistry, equipment, or techniques.
- Sabotage: Chemicals or materials that can be mixed with readily available materials.
First Step: Read the Appendix A CFATS Chemicals of Interest (COI) List (PDF, 419 KB) if your facility possesses or plans to possess any chemical(s). Any COI that meets or exceeds the STQ and concentration must be reported to the Cybersecurity and Infrastructure Security Agency (CISA).
Facilities that Possess COI
A facility that meets or exceeds the specified concentrations and quantities for any COI is required to report possession of those chemicals to CISA by completing an online survey called a Top-Screen via the Chemical Security Assessment Tool (CSAT).
CISA reviews Top-Screens using a risk-based methodology. Facilities are notified if they are:
- Determined to be a high-risk facility, and ranked into Tiers 1, 2, 3, and 4, with Tier 1 being the highest risk.
- Determined to not be a high-risk facility and not regulated under CFATS.
Facilities determined to be “high-risk” are required to develop a security plan and implement security measures that reduce the risks associated with their COI.
COI Resources for Facilities
CISA regularly engages with stakeholders to identify how to reach new segments of the population and ensure that those who hold COI are aware of their obligation to report.
Please download, print, and distribute these voluntary resources to increase the awareness of the CFATS program.
CFATS Ammonia (Anhydrous) Flyer (PDF, 257 KB) — This flyer helps facilities become aware that ammonia (anhydrous) is a release-toxic COI under CFATS that, if intentionally released, has the potential to create a toxic cloud that would affect populations within and beyond the facility. Any individual or facility that possesses 10,000 lb or more of ammonia (anhydrous) must report their chemical holdings to CISA.
CFATS Ammonium Nitrate Flyer (PDF, 488 KB) — This flyer helps facilities become aware that ammonium nitrate—Chemical Abstracts Service Number (CAS #) 6484-52-2—is a COI under the CFATS regulation. Review the flyer to determine if your facility needs to report either of the two listings of ammonium nitrate in Appendix A to CISA.
CFATS Hydrogen Peroxide Flyer (PDF, 280 KB) — This flyer helps facilities become aware that chemical mixtures in which the concentration of hydrogen peroxide is 35 percent or higher is an improvised explosive device precursor (IEDP) COI under CFATS. Any individual or facility that possesses 400 lb or more of a chemical mixture in which the concentration of hydrogen peroxide is 35 percent or higher and is contained in transportation packaging must report their chemical holdings to CISA.
CFATS Nitromethane Flyer (PDF, 291 KB) — This flyer helps facilities become aware that nitromethane is an improvised explosive device precursor (IEDP) COI under CFATS. Any individual or facility that possesses 400 lb (approximately 42 gallons) or more of nitromethane in transportation packaging must report their chemical holdings to CISA.
CFATS Propane Flyer (PDF, 250 KB) — This flyer helps facilities become aware that propane is a release-flammable COI that, if intentionally released, has the potential to create a vapor cloud explosion that would affect populations within and beyond the facility. Any individual or facility that possesses 60,000 lb or more of propane must report their chemical holdings to CISA.
Receiving a COI Flyer (PDF, 287 KB) — This flyer is a voluntary tool facilities can use when shipping, selling, or distributing a COI from their facility.
Top-Regulated COI Fact Sheet (PDF, 876 KB) — This fact sheet lists the most commonly reported COI, the main security issues, and the risks they pose.
Appendix A Final Rule
On November 20, 2007, the Department published the Final Rule for the Appendix A (PDF, 2.24 MB) in the Federal Register making all provisions of 6 CFR Part 27, including § 27.210(a)(1)(i), operative and in effect.
In developing Appendix A, the Department referenced existing expert sources of information including other federal regulations related to chemicals, such as:
- Chemicals covered under the Environmental Protection Agency’s Risk Management Program
- Chemicals included in the Chemical Weapons Convention
- Hazardous materials, such as gases that are poisonous by inhalation
- Explosives regulated by the Department of Transportation
CISA continues to assess available information about chemicals critical to the government mission and the economy. The Agency will use the information it collects through the Top-Screen process to identify facilities responsible for economically critical and mission-critical chemicals.