The Uinta Basin is one of only two areas in the world that experiences winter ozone. Ozone negatively impacts respiratory health, especially for those who have asthma, COPD or other breathing issues. Young children and older adults are particularly susceptible to its effects. The Environmental Protection Agency sets the upward limit of 70 ppb for ozone in ambient air. Measurements in excess are in violation and can result in fines and stricter standards. At regulatory monitoring stations during the 2024-2025 winter, the Uinta Basin had zero days of ozone that exceeded the EPA standard. However, because of previous years when ozone exceeded the EPA standard, portions of Uintah and Duchesne counties are designated as moderate non-attainment areas.

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