Nsps-445 May 2026

Topic: NSPS-445 Regulatory Citation: 40 CFR Part 60, Subpart NNNN Full Title: Standards of Performance for Stationary Compression Ignition Internal Combustion Engines (CI ICE) 1. Overview NSPS-445 establishes emission standards for new, reconstructed, or modified stationary compression ignition (diesel) internal combustion engines (CI ICE) with a site-rating greater than 500 brake horsepower (bhp) (373 kW). The rule is part of the New Source Performance Standards (NSPS) under the Clean Air Act.

Topic: NSPS-445 Regulatory Citation: 40 CFR Part 60, Subpart NNNN Full Title: Standards of Performance for Stationary Compression Ignition Internal Combustion Engines (CI ICE) 1. Overview NSPS-445 establishes emission standards for new, reconstructed, or modified stationary compression ignition (diesel) internal combustion engines (CI ICE) with a site-rating greater than 500 brake horsepower (bhp) (373 kW). The rule is part of the New Source Performance Standards (NSPS) under the Clean Air Act.