A new study from the University of Chicago has found that air pollution levels vary significantly from one neighborhood to another in Chicago. The study, which was published in the journal Environmental Science & Technology, found that the highest levels of air pollution were found in the city's Southeast Side and South Side neighborhoods, while the lowest levels were found in the North Side and Northwest Side neighborhoods.

The study's findings are based on data from the U.S. Environmental Protection Agency's (EPA) Air Quality System. The researchers analyzed data from 2017 and 2018 for fine particulate matter (PM2.5), nitrogen dioxide (NO2), and ozone (O3). PM2.5 is a type of air pollution that is made up of small particles of matter that can enter the lungs and cause respiratory problems. NO2 is a gas that is produced by burning fossil fuels, and it can cause respiratory problems and heart disease. O3 is a gas that is formed when sunlight reacts with other pollutants in the air, and it can cause respiratory problems and eye irritation.

The study found that the Southeast Side and South Side neighborhoods had the highest levels of PM2.5, NO2, and O3. The researchers say that this is likely due to a combination of factors, including the presence of industrial areas, heavy traffic, and a lack of green space. The North Side and Northwest Side neighborhoods had the lowest levels of pollution, likely due to their distance from major sources of pollution and the presence of more green space.

The study's findings are significant because they highlight the disparities in air pollution exposure that exist in Chicago. Residents of the Southeast Side and South Side neighborhoods are disproportionately exposed to air pollution, which can lead to a number of health problems. The study's findings can help policymakers and community leaders develop strategies to reduce air pollution in these neighborhoods and protect the health of residents.

Here are some of the key findings of the study:

* The average PM2.5 concentration in Chicago was 12.4 μg/m3. The highest PM2.5 concentrations were found in the Southeast Side and South Side neighborhoods, with average concentrations of 15.5 μg/m3 and 14.8 μg/m3, respectively. The lowest PM2.5 concentrations were found in the North Side and Northwest Side neighborhoods, with average concentrations of 10.1 μg/m3 and 10.3 μg/m3, respectively.

* The average NO2 concentration in Chicago was 30.8 ppb. The highest NO2 concentrations were found in the Southeast Side and South Side neighborhoods, with average concentrations of 36.5 ppb and 34.1 ppb, respectively. The lowest NO2 concentrations were found in the North Side and Northwest Side neighborhoods, with average concentrations of 26.1 ppb and 26.3 ppb, respectively.

* The average O3 concentration in Chicago was 40.1 ppb. The highest O3 concentrations were found in the Southeast Side and South Side neighborhoods, with average concentrations of 43.4 ppb and 42.8 ppb, respectively. The lowest O3 concentrations were found in the North Side and Northwest Side neighborhoods, with average concentrations of 37.1 ppb and 37.3 ppb, respectively.

The study's findings are consistent with previous research that has found that air pollution levels vary significantly from one neighborhood to another in Chicago. The study's findings also highlight the need for policies to reduce air pollution in Chicago, particularly in the Southeast Side and South Side neighborhoods.