T&L South Air Monitoring Station, Decatur, Illinois | United States

T&L South is an air monitoring station located at 2200 E Eldorado St in Decatur, Illinois, within Macon County. Operated by ERM Group, Inc, the station is part of the broader U.S. EPA Air Quality System (AQS) network, which monitors criteria pollutants and other atmospheric parameters to ensure compliance with National Ambient Air Quality Standards (NAAQS). The station's last reported sample date is October 1, 2025, indicating ongoing operational status. The station operates under the regulatory framework of the U.S. Clean Air Act, which mandates ambient air monitoring for pollutants such as ozone, particulate matter, carbon monoxide, sulfur dioxide, nitrogen dioxide, and lead. As a fixed-site monitor, T&L South contributes to the spatial representativeness of air quality data in central Illinois. The station's siting follows EPA guidelines to ensure data accuracy and comparability across the national network. Located in Decatur, an industrial city with manufacturing and agricultural processing, T&L South plays a key role in assessing local air quality impacts. The data collected supports public health advisories, regulatory compliance, and community awareness. Continuous monitoring at this station helps track long-term trends and informs air quality management decisions for the region.

T&L South monitors ambient air quality in Decatur, Illinois, a city with a mix of industrial and agricultural activities. The station's parameter coverage typically includes criteria pollutants like ozone and particulate matter, which are relevant for assessing health risks. Siting representativeness is ensured by EPA guidelines, and reporting continuity is maintained through the AQS network. This context supports understanding of local air pollution sources and trends.