US environmental regulators fix a typo in a rule about air pollution sources

US environmental regulators found a typo in a rule about how they classify air pollution sources. They are correcting this error. This means the original rule, which reclassified some major polluters as smaller ones, will now be applied as intended.

This document is a minor correction to a previous rule. It does not change the substance of the reclassification itself. The original rule allowed some large industrial facilities to be treated as smaller sources of hazardous air pollutants, which means they face less strict regulations. This correction ensures the regulatory text matches the agency's intent for that reclassification.