Changes in Atmospheric Aerosol Concentrations in the Midwest Over the COVID-19 Pandemic

Efforts to reduce the spread of the COVID-19 pandemic in 2020 altered the normal routines of millions of households across the United States. The population was encouraged to stay at home, schools and businesses adapted many functions to a virtual format, and travel was limited. These widespread shifts from normal behaviors inherently shifted normal emission patterns. This study aims to quantify the specific changes in air quality in the Midwest resulting from the societal conditions of the COVID-19 pandemic. While changes in air quality in major urban areas over this timeframe have been well-documented, less attention has been focused on the Midwest and its rural areas. To capture the impact of the pandemic on this less-studied region, this research utilizes AirNow Tech data from both rural (Bondville, IL) and urban (Chicago, IL) stations, allowing for the comparison of different environments. Through the analysis of PM2.5, PM10, and ozone concentrations in the atmosphere from 2018 to 2022, this study draws conclusions regarding the impact of the pandemic on air quality in the Midwest. Knowledge gained from this study may seek to inform future decisions regarding the reduction of pollution in the atmosphere.