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The Environmental Protection Agency (EPA or Agency) has decided not to proceed with the development of a regulation addressing the manufacture, processing, or distribution in commerce of lead for wheel-balancing weights ("lead wheel weights”) under the Toxic Substances Control Act (TSCA). This action relates to a citizen petition filed with the Agency in 2009 ("2009 petition”). The 2009 petition, which EPA granted, asked EPA to initiate a rulemaking proceeding to regulate the manufacturing, processing, or distribution in commerce of lead wheel weights. In 2023, the same parties filed a petition for a writ of mandamus that sought to compel EPA to initiate the rulemaking proceeding requested in the 2009 petition. After reviewing the information submitted in response to an advance notice of proposed rulemaking (ANPRM) issued in April 2024 and EPA’s technical analysis thereof, EPA published a document in the Federal Register in December 2024 explaining that the Agency did not receive any lead wheel weight exposure data during the ANPRM public comment period that it had not already considered or that would be sufficient to determine that this activity presents an unreasonable risk of injury to health or the environment. Therefore, EPA decided not to proceed with the development of a proposed rule. Addressing potential remaining exposures from lead continues to be a high priority for EPA, as reflected in EPA’s announcement that "Lead and Lead Compounds” is on its list of candidate chemical substances currently being considered for future prioritization actions under TSCA.