A hard-won rule to cut chemical plant pollution is being unraveled

A federal rule meant to cut toxic air pollution from petrochemical plants is being rolled back. The rule, finalized in 2024 and known as HON, required about 220 large petrochemical plants to upgrade pollution controls and install monitors at their property lines to track six hazardous chemicals, including ethylene oxide and vinyl chloride. The EPA estimated it would cut toxic air pollution by 6,200 tons a year and lower cancer risk near these plants by 96 percent. Since taking office, the Trump administration has granted more than 70 plants temporary exemptions from the rule and plans to propose a weaker replacement this fall.

Most of the affected plants are in Texas and Louisiana, though some are in Tennessee, Kentucky, West Virginia, Ohio, Illinois, and Alabama. If you live near a large chemical or petrochemical facility, this could mean less monitoring and looser limits on toxic emissions in your area going forward. The administration is also moving to undo a related safety rule that required chemical plants to prepare for disasters, share safety information publicly, and let workers halt dangerous operations — and it has taken down an online tool that let residents look up nearby plants' chemical use and accident history.

None of this involves rebates or home upgrades — it's a regulatory rollback affecting industrial air pollution rules, not homeowner energy programs. But if you live close to a chemical plant, it's worth knowing that federal oversight and public information about those facilities are both being scaled back, with a rewritten rule expected later this year.