40 CFR § 61.359 National Emission Standards for Hazardous Air Pollutants§ 61.359 [Reserved]Current through Aug 22, 2025 · Read all of Part 61⚠ 1 pending change to Part 61New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Northwest Clean Air Agency, Washington StateProposed Rule · comments close Nov 18, 2026 · Environmental Protection Agency