Railroad Modifications

HB 185 requires Utah's Division of Air Quality to study and reduce emissions from railroad locomotives operating in railyards within five ozone nonattainment counties (Davis, Salt Lake, Tooele, Utah, and Weber) by 2027. The bill mandates an emissions inventory by September 2025 for nitrogen oxides, carbon monoxide, and particulate matter, followed by a reduction plan targeting specific limits: 5.0 grams of nitrogen oxides per brake horsepower-hour, 2.4 grams of carbon monoxide, and 0.10 grams of particulate matter by December 2027. It directly affects railroads operating locomotives used for local yard service or under 2300 horsepower in those counties. The state agency must report findings and recommendations to lawmakers by November 2025. The bill does not appropriate new funds and expires in 2028.