This action promulgates national emission standards for hazardous air pollutants (NESHAP) for leather finishing operations. The EPA has identified these facilities as major sources of emissions of hazardous air pollutants (HAP), such as glycol ethers, toluene, and xylene. These NESHAP will implement section 112(d) of the Clean Air Act (CAA) by requiring all leather finishing operations that are major sources to meet HAP emission standards reflecting the application of the maximum achievable control technology (MACT). We estimate the final NESHAP will reduce nationwide emissions of HAP from leather finishing operations by 375 tons per year (tpy). In addition, the final NESHAP will reduce non-HAP emissions of volatile organic compounds (VOC) by 750 tpy. The emissions reductions achieved by these final NESHAP, when combined with the emissions reductions achieved by other similar standards, will provide protection to the public and achieve a primary goal of the CAA.