Michigan Proposes Removing Detroit Ozone Pollution Data

State officials aim to reclassify Detroit air quality by excluding ozone data attributed to wildfire smoke events.

Updated on Oct. 21, 2026 in Asthma

Michigan Proposes Removing Detroit Ozone Pollution Data

Live Poll

Should states be allowed to exclude environmental pollution data caused by natural events like wildfires?

The Michigan Department of Environment, Great Lakes and Energy (EGLE) is proposing to remove 21 days of ozone pollution data from Detroit's air quality records. The state agency submitted the draft request in May 2026 to seek redesignation as an attainment area for federal standards.

Why it matters

The proposal relies on a Clean Air Act provision allowing the exclusion of data from exceptional events like wildfire smoke. Advocates fear the move is intended to mask ongoing violations of air quality standards in a region already struggling with high pollution levels.

Local industry accounts for 85% to 90% of Detroit's ozone pollution, while wildfire smoke contributes 5% to 15%. Detroit was ranked sixth-worst in the nation for year-round particle pollution in a 2025 American Lung Association report.

The players

Michigan Department of Environment, Great Lakes and Energy

This state agency oversees environmental protection programs and manages air quality monitoring and compliance records in Michigan.

Environmental Protection Agency

This federal agency is responsible for enforcing environmental laws and must grant final approval for any state requests to change air quality attainment designations.

American Lung Association

This national nonprofit organization tracks public health data and issues periodic reports on air quality and respiratory health across the United States.

The details

State officials argue that wildfire smoke qualifies as an exceptional event, allowing for the exclusion of data to meet EPA requirements. Critics and environmental experts contend that the proposal overlooks that the vast majority of local ozone pollution originates from industrial sources rather than environmental factors.

In 2022, EGLE first requested that Detroit be redesignated as an attainment area.
In 2024, the American Lung Association graded Detroit with an F for ozone pollution.
In 2025, the American Lung Association ranked Detroit as the sixth-worst city for year-round particle pollution.
In May 2026, EGLE submitted a more recent draft of the attainment request.

The Big Picture

The state's request utilizes a provision within the Clean Air Act specifically designed for exceptional events to justify reclassifying regional air quality records. This approach highlights an ongoing tension between states seeking attainment status and the rigorous pollution oversight required by federal law.

The potential reclassification of air quality standards could alter how the city addresses local pollution sources that impact residents with asthma and other respiratory issues. Changes to these records may affect future public health policy and the implementation of local air quality safety measures.

The takeaway

Understanding the source of local pollution is critical for residents managing respiratory health conditions like asthma. Public scrutiny of state environmental records remains a vital check on the accuracy of data used to inform city-wide air quality and public safety policies.