HR-7849-119
Referred to the House Committee on Energy and Commerce.
Sponsored by Victoria Spartz (R-IN)
What it does
This bill would remove the application of Clean Air Act emissions standards to nonroad engines and nonroad vehicles used for agricultural purposes. Currently, the EPA sets emissions standards for nonroad engines (such as those in tractors, combines, and other farm machinery) under the Clean Air Act; this bill would create a categorical exemption for any such equipment used in agriculture.
Who benefits
Farmers and agricultural operations of all sizes who use tractors, combines, harvesters, irrigation pumps, and other nonroad equipment — particularly smaller operations where compliance costs represent a larger share of revenue. Farm equipment manufacturers who would face fewer regulatory constraints on engine design for agricultural products. Rural communities economically dependent on agriculture. Buyers of new farm equipment who might see lower prices if compliance costs are reduced.
Who is hurt
Rural and agricultural communities located near heavy farm equipment use who may experience increased exposure to diesel particulate matter and nitrogen oxides. Children and elderly residents in farming regions who are more vulnerable to air quality impacts. States and localities that rely on federal nonroad emissions standards as a baseline for their own air quality plans. Public health programs that track and respond to air quality in agricultural areas. Engine manufacturers who have already invested in compliance technology and could face competitive disadvantage from competitors who no longer need to meet those standards.
Supporters argue
Supporters argue that farm equipment operates in open, rural environments where emissions dispersion is fundamentally different from urban or highway contexts, making the same standards applied to on-road vehicles disproportionate in cost and benefit. They contend that EPA nonroad Tier 4 engine standards have significantly increased the purchase price and maintenance complexity of farm machinery — with some estimates placing compliance costs in the tens of thousands of dollars per unit — placing a heavy burden on farmers already operating on thin margins in a globally competitive industry.
Opponents argue
Opponents argue that agricultural diesel equipment is a significant source of nitrogen oxide and particulate matter emissions, and that EPA data show nonroad engines contribute meaningfully to regional air quality problems, including in rural areas where farm workers and nearby residents bear direct health consequences. They contend that removing emissions standards would reverse decades of air quality progress, potentially jeopardizing state implementation plans under the Clean Air Act and exposing downwind communities — who have no say in the exemption — to increased pollution without recourse.
Constitutional context
The Clean Air Act's nonroad engine emissions program rests on Congress's Commerce Clause authority (Art. I, §8, cl. 3), which has long supported federal regulation of engines and fuels that move in interstate commerce. This bill does not expand agency authority — it restricts it by statute — so the major questions doctrine concerns raised in West Virginia v. EPA (2022) and the post-Chevron scrutiny from Loper Bright v. Raimondo (2024) are less directly implicated, though any remaining EPA interpretive discretion in implementing the exemption's boundaries would face heightened judicial review.
Checks and balances
Congress would reduce EPA's regulatory authority over a defined equipment category; the EPA would retain authority to define the scope of "agricultural purposes," subject to independent judicial review under Loper Bright; states with EPA-approved air quality plans may face implementation challenges but retain their own regulatory authority under the Tenth Amendment.
Historical precedent
The Clean Air Act has historically included limited exemptions for certain nonroad equipment categories (e.g., smaller engines below certain horsepower thresholds), but a blanket categorical exemption for all agricultural nonroad engines has not previously been enacted at the federal level.