Union County #2 Renken Air Monitoring Station, Union County, South Dakota

Union County #2 Renken is an air monitoring station located in Union County, South Dakota, United States. The station is part of the state's ambient air quality monitoring network, operated by the South Dakota Department of Agriculture and Natural Resources. It serves a rural area, contributing to the assessment of regional air quality. The station operates under the regulatory framework of the US EPA's Air Quality System (AQS), which sets standards for criteria pollutants such as ozone, particulate matter, carbon monoxide, sulfur dioxide, nitrogen dioxide, and lead. While specific parameters measured at this site are not detailed, typical rural monitoring stations in South Dakota focus on ozone and fine particulate matter to track regional transport and background levels. As part of the state's monitoring network, Union County #2 Renken provides data that supports compliance with National Ambient Air Quality Standards (NAAQS) and informs public health advisories. Its location in a non-urban area helps characterize air quality in agricultural and natural landscapes, complementing urban monitors in Sioux Falls and other cities.

Union County #2 Renken operates in a rural agricultural region of southeastern South Dakota, where air quality is influenced by farming activities, including crop dusting and livestock operations, as well as regional transport from industrial areas. The station's siting is representative of background conditions, helping to distinguish local sources from broader regional pollution. Monitoring in such areas is crucial for understanding the impact of agriculture on air quality and for validating models used in regulatory assessments.