Which of the following regulates chemical security in the U.S.?

The Department of Homeland Security (DHS) is responsible for regulating chemical security in the United States. This agency's role encompasses a wide range of security measures designed to protect the nation from potential threats, including those associated with chemicals that could be used in terrorist attacks or pose risks to public safety.

One of the main initiatives under the DHS is the Chemical Facility Anti-Terrorism Standards (CFATS), which specifically addresses the security of high-risk chemical facilities. These standards require certain facilities to assess and manage the risks associated with the chemicals they have on-site, thereby ensuring that appropriate security measures are in place to prevent theft, sabotage, or other malicious activities.

In contrast, while the other agencies mentioned have regulatory roles in specific areas—such as the Drug Enforcement Administration overseeing controlled substances, the Nuclear Regulatory Commission focusing on nuclear safety, and the Federal Aviation Administration managing aviation operations and safety—they do not have the primary responsibility for chemical security across the nation like the Department of Homeland Security. This distinction emphasizes the unique role of DHS in protecting against chemical threats.