No Nuclear Testing Act of 2025

# Summary of the No Nuclear Testing Act of 2025 **What the Bill Would Do** The No Nuclear Testing Act of 2025 would reinforce and potentially strengthen the United States' commitment to not conducting nuclear weapons tests. This bill builds on the Comprehensive Nuclear Test Ban Treaty (CTBT), which the U.S. signed but has not formally ratified. The legislation would codify into federal law the existing ban on nuclear weapons testing, making it a permanent legal requirement rather than just a policy commitment. **Who It Affects and Key Provisions** The bill primarily affects the Department of Energy, the Department of Defense, and nuclear weapons laboratories that conduct weapons research and development. It would legally prohibit all forms of nuclear explosive testing on U.S. territory.

The measure emphasizes nonproliferation—preventing the spread of nuclear weapons—and signals to other nations that the U.S. is serious about nuclear restraint, potentially encouraging other countries to follow suit. **Current Status** As of now, S. 3090 is in committee and has not yet been voted on by the full Senate. The bill was introduced by Senator Edward J. Markey (D-MA) in the 119th Congress. For the bill to become law, it would need to pass out of committee, receive a Senate vote, pass the House, and be signed by the President.