Herriman #3 Air Monitoring Station, Herriman, Utah | United States

Herriman #3 is an air monitoring station located at 14058 Mirabella Dr. in Herriman, Salt Lake County, Utah. Operated by the Utah Department of Environmental Quality, it is part of the broader US EPA Air Quality System (AQS) network, which monitors ambient air quality across the United States. The station provides critical data on criteria pollutants such as ozone, particulate matter, and nitrogen dioxide, supporting local and national air quality management. The station operates under the regulatory framework of the Clean Air Act and EPA standards, which mandate monitoring in populated areas to assess compliance with National Ambient Air Quality Standards (NAAQS). As part of Utah's state network, Herriman #3 likely employs federal reference or equivalent methods for continuous or periodic sampling. The last reported sample date is September 30, 2025, indicating ongoing data collection. Herriman #3 serves the rapidly growing community of Herriman, located in the Salt Lake Valley, where urban expansion and geographic factors like mountain inversions can affect air quality. The station's data helps inform public health advisories, emission reduction strategies, and regional planning. Its role in the AQS network ensures that local air quality trends are tracked and reported to the public and policymakers.

Herriman #3 is situated in the Salt Lake Valley, a region known for wintertime temperature inversions that trap pollutants near the surface, leading to elevated particulate matter levels. The station's monitoring of criteria pollutants is essential for understanding these episodes and guiding mitigation efforts. Its location in a suburban area provides representative data for population exposure, complementing urban and rural stations in the state network.