Bronte Wells
Detroit has been ranked among the worst cities in the United States for air pollution, with the metro area ranking 13th worst in the nation for annual particle pollution in 2024. Southwest Detroit, in particular, has the highest levels of air pollution in Michigan and is among the top 5% in the country. The city's air quality index (AQI) reveals that PM2.5 concentration is 5.5 times the World Health Organization's annual guideline value. This has detrimental effects on human health, causing asthma attacks, sick leave, and low birth weight in babies. With industrial factories, warehouses, and construction projects contributing to air pollution, identifying a single culprit is challenging. However, community organizations, health providers, and researchers are working collaboratively to address Detroit's pollution challenges and improve the health and well-being of its residents.
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What You'll Learn
Detroit's air pollution
Detroit has some of the worst air pollution in the United States, with the metro area ranked 13th worst in the nation for annual particle pollution in the 2024 State of the Air report by the American Lung Association. The report also gave Detroit area counties failing grades for ozone and both short-term and annual particle pollution.
Southwest Detroit has the highest levels of air pollution in Michigan and is among the top 5% in the country. The area consists of two zip codes with more than 150 facilities that emit toxic fumes, gases, chemicals, and particulate matter. These include a sprawling oil refinery, two aging steel plants, a coke battery plant, and a coal-burning power plant. The residential population of Southwest Detroit is largely comprised of racial minorities and people with lower incomes. About 57% of the community identifies as Latino, and 23% identify as Black. Almost half of all adults lack a high school diploma.
The National Institute of Environmental Health Sciences (NIEHS) estimates that 9 out of 10 urban area residents are impacted by air pollution. The health effects of air pollution are well-known and include asthma attacks, heart attacks, strokes, preterm births, and impaired cognitive functioning later in life. In Detroit, air pollution is causing kids to have asthma attacks, making people who work outdoors sick and unable to work, and leading to low birth weight in babies.
Community organizations, health providers, and public health researchers are working together to address Detroit's pollution challenges and improve the health and well-being of the community. One example is the Community Action to Promote Healthy Environments (CAPHE), which aims to develop and implement a community-led public health action plan to reduce air pollution and associated adverse health effects in Detroit and surrounding communities.
The EPA is also taking action to address air pollution in Detroit. They have recently finalized new air pollution rules and are considering revising the standard limit for particulate matter (PM2.5) pollution to between 8 and 10 micrograms per cubic meter. With revised standards, Detroit would exceed the federal limit, triggering measures to reduce PM2.5 emissions and achieve the standard within 5 years.
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The impact of air pollution on health
Detroit has been identified as one of the worst cities in the US for annual particle pollution, with the Detroit-Warren-Ann Arbor metro area ranking 13th worst in the nation for ozone pollution. The city's air quality index (AQI) has shown PM2.5 concentrations at 5.5 times the World Health Organization's annual guideline value.
Air pollution has severe impacts on human health, affecting almost every organ in the body. The main pathway of exposure is through the respiratory tract, where pollutants cause inflammation, oxidative stress, immunosuppression, and mutagenicity in cells, impacting the lungs, heart, and brain. Fine particulate matter, such as PM2.5, can penetrate deep into the lungs, enter the bloodstream, and travel to other organs, causing systemic damage to tissues and cells. Ozone (O3) is another critical pollutant, acting as a powerful lung irritant and causing shortness of breath, coughing, and chest tightness.
The health effects of air pollution exposure can be both immediate and long-term. Short-term exposure to higher levels of air pollution is associated with reduced lung function, asthma, cardiac problems, and increased hospital admissions. Long-term exposure increases the risk of non-communicable diseases, including stroke, heart disease, chronic obstructive pulmonary disease, and cancer. Maternal exposure to air pollution is also associated with adverse birth outcomes, such as low birth weight and pre-term births.
Certain populations are more vulnerable to the health impacts of air pollution. Children, the elderly, pregnant women, and individuals with pre-existing chronic conditions are at higher risk of developing air pollution-related diseases. Additionally, communities of colour are disproportionately exposed to unhealthy air due to the discriminatory placement of sources of pollution, such as power plants and industrial facilities, in their neighbourhoods. Psychosocial stressors, such as poverty and racial discrimination, can further amplify the harmful effects of air pollution on these communities.
To address the health impacts of air pollution in Detroit, efforts are being made to identify major sources of emissions and reduce PM2.5 levels. Community organisations, health providers, and public health researchers are collaborating to improve health equity and reduce air pollution in the city and surrounding communities.
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The worst-polluted areas in Detroit
Detroit has been ranked as one of the worst cities in the United States for annual pollution. According to the American Lung Association's 2024 "State of the Air" report, the Detroit metro area ranks 13th worst in the nation for annual particle pollution. This is an improvement from its ranking of 12th worst in the previous year's report.
The Detroit-Warren-Ann Arbor metro area has also been identified as having high levels of ozone pollution, ranking 33rd worst in the nation. This ranking was based on the average number of unhealthy days in Macomb County, Michigan, which had 5.7 days of ozone pollution per year, earning an F grade.
Within the city of Detroit, Southwest Detroit stands out as a particularly polluted area. It has been described as a public health crisis, with industrial air pollution affecting the predominantly low-income and racially diverse community. In the two zip codes that make up Southwest Detroit, there are over 150 facilities that emit toxic fumes, gases, chemicals, and particulate matter. These include an oil refinery, steel plants, a coke battery plant, and a coal-burning power plant. The high concentration of industrial factories in the area makes it challenging to identify a single culprit for the pollution.
Community organizations, health providers, and public health researchers are working together to address the pollution challenges in Southwest Detroit and improve the health and well-being of the community. Initiatives like the Community Action to Promote Healthy Environments (CAPHE) aim to develop and implement scientifically-based, community-led public health action plans to reduce air pollution and mitigate its adverse health effects.
The University of Michigan School of Public Health has also conducted studies to identify major sources of particulate matter (PM2.5) in Southwest Detroit, using data collected over six years (2016-2021) and comparing it with previous data from 2001-2014. These efforts are crucial in addressing the disproportionate impact of air pollution on urban populations and promoting health equity in the affected communities.
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Industries contributing to air pollution
Detroit has been identified as one of the most polluted cities in the United States, with the Detroit metro area ranking 13th worst in the nation for annual particle pollution. The city's air quality index (AQI) is currently rated as "moderate", with the main pollutant being PM2.5, which is currently at concentrations 5.5 times higher than the World Health Organization's annual guideline value.
Southwest Detroit, in particular, has been identified as having some of the highest levels of air pollution in Michigan, ranking among the top 5% in the country. This area is home to numerous industrial facilities, including oil refineries, steel plants, a coke battery plant, and a coal-burning power plant. These industries have been identified as major sources of particulate matter and toxic chemicals, which have led to a public health crisis in the area, with residents suffering from high rates of asthma, cancer, and respiratory and cardiovascular illnesses.
The residential population of Southwest Detroit is largely comprised of racial minorities and people with lower incomes, who lack the political and economic resources to lobby against the corporate entities responsible for the pollution. Systemic racism, limited financial resources, and low educational attainment have made this community vulnerable to exploitation, with industries taking advantage of lenient air quality standards to build factories near residential areas and schools.
In addition to industrial sources, mobile sources such as cars, trucks, and other vehicles also contribute significantly to air pollution in Detroit. The city's large neighbourhoods and schools are often located adjacent to major roadways and industrial facilities, increasing the exposure of residents to harmful pollutants.
Climate change is also a contributing factor, as wildland fires, made more likely by a changing climate, can produce unprecedented levels of pollution. The construction of new industries, warehouses, and infrastructure projects, such as the Gordie Howe International Bridge, is expected to bring additional exposure to particulate matter and further worsen air quality in the region.
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Actions to improve Detroit's air quality
Detroit has been identified as one of the worst cities in the United States for annual particle pollution, with the metro area ranking 13th worst in the nation for year-round average particle pollution levels, according to the American Lung Association's 2024 "State of the Air" report. The report also revealed that Detroit area counties received failing grades for ozone and both short-term and annual particle pollution.
Southwest Detroit, in particular, has been identified as having the highest levels of air pollution in Michigan and ranking among the top 5% in the country. The area is home to major industrial factories such as U.S. Steel and Marathon Petroleum Refinery, which have been producing heavy pollutants for generations. Other sources of pollution include power plants, truck traffic, and wildland fire smoke from Canada.
To improve Detroit's air quality, the following actions are recommended:
- Recognize the Issue as a Public Health Crisis: By acknowledging the severity of the problem, stakeholders can prioritize monitoring pollution levels, enforcing air pollution laws, and implementing new policies to address air quality.
- Identify Major Sources of Emissions: Understanding the specific sources of pollution, such as industrial factories, power plants, and vehicle emissions, is crucial for developing targeted solutions.
- Reduce Emissions: Lowering emissions from industrial sources and vehicles is essential for improving air quality. This can be achieved through stricter regulations, cleaner technologies, and the promotion of sustainable practices.
- Community-Academic Partnerships: Community organizations, health providers, and public health researchers are already collaborating to address pollution challenges. Initiatives like Community Action to Promote Healthy Environments (CAPHE) aim to develop and implement scientifically-based, community-led public health action plans to reduce air pollution and improve health outcomes.
- Address Social and Environmental Justice Issues: Southwest Detroit has a high proportion of racial minorities and low-income households, who are disproportionately affected by air pollution and lack access to quality healthcare. Addressing systemic racism, improving educational opportunities, and ensuring equal access to healthcare can help build community resilience and reduce the impact of pollution on vulnerable populations.
- Stronger National Limits on Ozone Pollution: The EPA has been urged to set stronger national limits on ozone pollution, which is a significant issue in the Detroit metro area. This includes reducing ground-level ozone, also known as "smog," which is the air pollutant affecting the largest number of people in the United States.
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Frequently asked questions
Detroit has one of the worst pollution rates in the United States. According to the 2024 'State of the Air' report by the American Lung Association, the Detroit metro area ranked 13th worst in the nation for annual particle pollution. The report also stated that Detroit area counties received failing grades for ozone and both short-term and annual particle pollution.
The main sources of pollution in Detroit are industrial factories, power plants, truck traffic, and wildland fire smoke. Southwest Detroit, in particular, has the highest levels of air pollution in Michigan and is in the top 5% in the country. The area has a high concentration of industrial factories, with over 150 facilities that emit toxic fumes, gases, and chemicals within two zip codes.
Community organizations, health providers, and public health researchers are working together to address the pollution challenges and improve the health and well-being of the community. The University of Michigan School of Public Health has also released a study to identify major sources of emissions and promote health equity through community-academic partnerships. Additionally, the EPA is revising its standard limit for particulate matter pollution, which is expected to trigger measures to reduce emissions and improve air quality in Detroit.
