New ‘State of the Air’ Report Shows Greater Springfield’s Air Quality Worsened

The air quality in Greater Springfield has worsened according to the American Lung Association’s 2025 “State of the Air” report, released today. Area residents are being exposed to more unhealthy ozone smog and particle pollution the report finds. Greater Springfield is ranked as the 40th worst in the nation for ozone pollution with 6.7 unhealthy days per year and received an F grade. The metro area received a C grade for particle pollution and is ranked the 104th worst in the nation with 1.8 unhealthy days per year.

The report also found that nearly half of the U.S. population, 156 million people, are living in areas that had unhealthy levels of air pollution. Researchers add extreme heat and wildfires contributed to the worsening air quality across much of the country

The Lung Association’s 26th annual “State of the Air” report grades exposure to unhealthy levels of ozone air pollution and particle pollution over a three-year period (2021-2023). The report looks at the latest quality-assured air quality data from 2021-2023.

Ground-level Ozone Pollution in the Springfield-Jacksonville-Lincoln, IL metro area:

• Ground-level Ozone Pollution in the Springfield-Jacksonville-Lincoln, IL metro area:
  • National Ranking: 40th worst out of 228 (79th worst in 2024 report)
  • Number of Unhealthy Days Per Year: 6.7 days per year (1 day per year in 2024 report)
  • Grade: F, Sangamon County worst in metro area (C in 2024 report)
• Particle Pollution in the Springfield-Jacksonville-Lincoln, IL metro area:
  • National Ranking: 104th worst out of 223 (124th worst in 2024 report)
  • Number of Unhealthy Days Per Year: 1.8 days per year (0.3 days per year in 2024 report)
  • Grade: C, Sangamon County worst in metro area (B in 2024 report)
• Year-Round Average Level of Particle Pollution in the Springfield-Jacksonville-Lincoln, IL metro area:
  • National Ranking: 77th worst in the nation (99th worst in 2024 report)
  • Grade: Passing grade, pollution levels below the federal standard

Ozone smog and particle pollution are widespread and can impact anyone’s health. Both pollutants can cause premature death and other serious health effects such as asthma attacks, heart attacks and strokes, preterm births and impaired cognitive functioning later in life. Particle pollution can also cause lung cancer.

“Unfortunately, we have seen a significant decline in the air quality of the Greater Springfield area which means too many people are living with unhealthy levels of ozone and particle pollution. This air pollution is a threat to human health at every stage of life – from increasing the risk of premature birth and low birth weight babies to causing or worsening lung disease,” said Kristina Hamilton, Advocacy Director for the American Lung Association. “We urge Illinois policymakers to take action to improve our air quality, including adopting clean vehicles standards and we are calling on everyone to support the incredibly important work of the U.S. Environmental Protection Agency (EPA).”

Air quality in most other areas of the state also significantly worsened since last year’s report.

Highlights include: The Chicago metro area ranked 15th most polluted city for ozone and 13th for year-round particle pollution; the Rockford metro area’s grade for particle pollution fell from an A to a D; and the Peoria metro area’s grade for ozone pollution fell from a B to an F while it received an A grade for short-term particle pollution, up from a B.

On a national level, the “State of the Air” report found that 156 million people in the U.S. (46%) live in an area that received a failing grade for at least one measure of air pollution. 42.5 million people live in areas with failing grades for all three measures. The report also found that a person of color in the U.S. is more than twice as likely as a white individual to live in a community with a failing grade on all three pollution measures. Notably, Hispanic individuals are nearly three times as likely as white individuals to live in a community with three failing grades.

In Illinois, the Lung Association is urging the state’s Pollution Control Board to adopt key clean vehicle standards—the Advanced Clean Trucks, Heavy-Duty Low-NOx Omnibus and Advanced Clean Cars II—because of the air quality and lung health benefits these standards will provide. Additionally, the organization is urging the Illinois General Assembly to pass the Powering Up Illinois Act (HB 5610 / SB 3794), which modernizes Illinois’ planning process for distribution electricity infrastructure to account for air quality standards.

The Lung Association is calling on everyone to support the U.S. Environmental Protection Agency. The EPA is essential to protecting people’s health from ozone and particle pollution. Join the American Lung Association in advocating to protect EPA’s expert staff and lifesaving programs. See the full report results and take action at Lung.org/sota.

The “State of the Air” report relies on data from air quality monitors managed by state, local and Tribal air pollution control authorities in counties across the U.S. The rankings are based on the worst county in the area’s average number of unhealthy days

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