HB 185, titled Railroad Modifications, directs the Utah Division of Air Quality to study railroad-related emissions in ozone nonattainment counties and to develop an emissions reduction plan. By September 30, 2025, the division must complete an inventory of emissions from all railyards in those counties for nitrogen oxides, carbon monoxide, particulate matter, and any other compounds it identifies. The bill focuses on locomotives used for local yard service or those with less than 2,300 horsepower operating in those railyards.
The bill also requires the division to propose an emissions reduction plan that would bring those locomotive emissions down to specified levels by December 31, 2027, and to recommend what state actions would be needed to implement the plan. The division must then report its findings and legislative recommendations to the Natural Resources, Agriculture, and Environment Interim Committee in November 2025. The bill does not appropriate money and includes a repeal date for the new section in 2028.
Impact
HB 185 adds a new section to Title 19 of the Utah Code, creating a formal state study-and-planning process for railroad locomotive emissions in ozone nonattainment counties. It affects the Division of Air Quality by assigning new inventory, planning, and reporting duties, and it may influence future regulation or legislation affecting rail yards, locomotive operations, and air quality compliance in Davis, Salt Lake, Tooele, Utah, and Weber counties. The bill also amends the repeal-date section to sunset the new study provision in 2028.
Sentiment
The bill appears to be framed as an air-quality and planning measure rather than an immediate regulatory mandate, which may make it more broadly acceptable to lawmakers concerned about pollution in urban rail corridors. Because there are no recorded committee transcripts or votes in the provided materials, there is no direct evidence of support or opposition from debate. The structure of the bill suggests a measured approach that seeks data, recommendations, and later legislative action before imposing any substantive emissions requirements.
Contention
The main point of potential contention is whether the state should move toward emissions limits for railroad locomotives and, if so, how quickly and at what cost. Rail operators and affected industries may be concerned about operational constraints, compliance burdens, and the feasibility of meeting the proposed emissions targets, while environmental and air-quality advocates are likely to support the study and reduction plan as a response to ozone and particulate pollution. Another possible issue is the bill’s focus on specific counties and locomotive categories, which may raise questions about scope, enforcement, and whether the state should act now or wait for further study.