LOGAN #4 Air Monitoring Station, Logan, Utah | Environmental Monitoring

LOGAN #4 is an air monitoring station located at 125 W. Center Street in Logan, Cache County, Utah, United States. The station is operational and falls under the reporting agency of the Utah Department of Environmental Quality. As part of the national air monitoring network, it supports the collection of ambient air quality data in the region. The station operates within the framework of the US EPA Air Quality System (AQS), which sets standards for criteria pollutants such as ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide. Monitoring stations like LOGAN #4 typically measure a subset of these pollutants to assess compliance with National Ambient Air Quality Standards (NAAQS). The station's siting in an urban area provides representative data for population exposure. Environmental monitoring in Logan is important due to the city's location in the Cache Valley, which can experience temperature inversions that trap pollutants. The data from LOGAN #4 helps local and state agencies manage air quality and protect public health. The station's long-term operation ensures continuity in tracking air quality trends and supports regulatory decision-making.

Logan is situated in Cache Valley, a mountain valley in northern Utah that is prone to wintertime temperature inversions. These inversions trap cold air and pollutants near the ground, leading to elevated concentrations of particulate matter (PM2.5) and other pollutants. The air monitoring station LOGAN #4 provides critical data on these episodes, helping to inform health advisories and emission reduction strategies. The station's urban location ensures that measurements reflect population exposure, a key factor in siting representativeness for regulatory monitoring networks.