EPA is finalizing tolerance actions for six pesticide active ingredients—hydrogen cyanide, 1-naphthaleneacetic acid, carboxin, ethofumesate, thiobencarb, and propylene oxide—under registration review conducted pursuant to FIFRA. The final rule establishes modifications to tolerance levels codified at 40 CFR 180.130, 180.155, 180.301, 180.345, 180.401, and 180.491. Affected parties include crop producers (NAICS 111), animal producers (NAICS 112), food manufacturers (NAICS 311), and pesticide manufacturers (NAICS 32532). Objections and hearing requests must be received on or before June 22, 2026 in accordance with 40 CFR part 178.