Coggon Elementary School Bldg. Northern Limits of Linn County - Air Monitoring Station in Coggon, Iowa

Coggon Elementary School Bldg. Northern Limits of Linn County is an air monitoring station located at 408 E. Linn St. in Coggon, Iowa, within Linn County. Operated by the Linn County Health Department, the station is part of the broader US EPA Air Quality System (AQS) network, which monitors criteria pollutants and other parameters to assess compliance with National Ambient Air Quality Standards (NAAQS). The station's last reported sample date is October 31, 2025, indicating ongoing operations. As a monitoring station in a rural setting, it likely measures key pollutants such as ozone, particulate matter (PM2.5 and PM10), or nitrogen dioxide, depending on local regulatory priorities. The station's siting follows EPA guidelines for representativeness, capturing background or downwind concentrations from nearby agricultural and small industrial sources. The Linn County Health Department oversees data collection and reporting, ensuring continuity and quality assurance. The station plays a vital role in protecting public health by providing data used for air quality index (AQI) forecasts and regulatory compliance. Its location in a small community underscores the importance of distributed monitoring networks that cover both urban and rural areas, helping to identify pollution trends and inform local environmental policies.

Coggon is a small town in eastern Iowa, surrounded by agricultural land and light industry. Air quality in the region can be influenced by agricultural emissions (ammonia, particulate matter from tilling) and seasonal ozone formation. The monitoring station helps characterize background concentrations and potential transport of pollutants from larger urban centers like Cedar Rapids. Parameter coverage typically includes criteria pollutants, with siting designed to be representative of community exposure. Reporting continuity through the Linn County Health Department ensures data is available for regulatory assessments and public information.