U.S. Senator John Curtis of Utah welcomed on Apr. 21 the Environmental Protection Agency’s proposal to repeal a previous decision that would have reclassified Utah’s Northern Wasatch Front from a “Moderate” to a “Serious” nonattainment area under the 2015 Ozone National Ambient Air Quality Standards.
The issue is significant for residents and businesses in the affected region, as stricter air quality classifications can lead to tougher regulations and potential penalties for communities. The EPA’s new proposal considers factors beyond local control when assessing compliance with federal air standards.
“For too long, Utah has faced the prospect of being penalized for air pollution we did not create and cannot control,” said Senator Curtis. “Today’s proposal shows that the EPA is listening to Utah and correctly understands how ozone exceedances should be evaluated in the Northern Wasatch Front. This is how good environmental policy should work—grounded in science, responsive to states, and focused on practical outcomes.”
The EPA based its reconsideration on Section 179B of the Clean Air Act, which allows international emissions to be taken into account when determining if an area meets federal air quality standards. According to multiple reconsideration requests from Curtis and other members of Utah’s congressional delegation, along with technical analysis from state officials, the agency found that external factors contributed significantly to ozone levels in northern Utah.
On March 5, 2025, the EPA agreed to review its earlier determination regarding timely attainment of ozone standards by Utah’s Northern Wasatch Front area and its subsequent reclassification as a “Serious” nonattainment zone. The current standard set by EPA requires areas not to exceed an average ozone concentration of 70 parts per billion.
Curtis serves as senator representing Utah and previously served two terms as mayor of Provo according to his official website. He also founded the Conservative Climate Caucus according to his official website.
Broader implications include possible relief for communities facing regulatory challenges due largely or partly to sources outside their control. Observers will watch closely how this policy shift affects future decisions about air quality compliance.