Alarming Correlation: The Situation of Toxic Waste Sites and Marginalized Communities

A new, comprehensive U.S. study has highlighted that lower-income and minority communities are significantly more likely to live near industrial waste sites where carcinogenic chemicals are disposed of. According to the nationwide study examining data between 2010 and 2018, more than 5 million people live in the immediate danger zone.

Background and Participants of the Study

Led by a faculty member from the University of Illinois Springfield (UIS), the study examined the demographic patterns of toxic waste disposal. Published on April 23, 2026, in the Journal of Exposure Science & Environmental Epidemiology, the research was spearheaded by Jessica M. Madrigal, an associate professor at the UIS School of Integrated Sciences, Sustainability and Public Health. The project was supported by the Intramural Research Program of the National Cancer Institute, part of the U.S. National Institutes of Health (NIH).

Co-authors of the research team included Jared A. Fisher, Barry I. Graubard, Rena R. Jones, Caroline N. Pruitt, Elizabeth Sharp, and Mary H. Ward from the National Cancer Institute, as well as Abigail R. Flory representing Westat Inc. The experts analyzed nationwide data from the U.S. Environmental Protection Agency’s (EPA) Toxics Release Program for the period between 2010 and 2018.

Quantitative Data and the Chemicals Involved

During the study, researchers identified locations where companies disposed of known or suspected carcinogenic chemicals on land, such as in landfills or underground injection wells. This geographic distribution was then compared with the demographic data of the respective census tracts.

Based on the extracted data, millions of pounds (thousands of tons) of proven or suspected carcinogenic chemicals are disposed of on land in the United States every year. A significant portion of these toxic substances—including asbestos, as well as heavy metals like beryllium, cadmium, and nickel—are deposited directly at or in close proximity to their production sites.

Demographic Inequities: Who Lives in the Danger Zone?

The study revealed clear, systemic patterns in the populations of the affected areas. Communities with higher poverty rates, as well as Black and Hispanic residents, live in significantly higher proportions in areas where these toxic chemicals are concentrated.

Associate Professor Jessica M. Madrigal illustrated the severity of the problem with the following quantitative data: “We estimate 5.3 million people live in census tracts where these land disposals are occurring; these disposals were most likely to occur in tracts with higher proportions of populations living in poverty, which aligns with our past investigations of carcinogenic air emissions.”

The survey also highlighted regional differences within the United States. The research found that the vast majority of the highest levels of chemical waste disposal are concentrated in the Southern and Western regions, drawing attention to the geographic inequalities of environmental exposure.

Health Risks and Regulatory Limitations

Previous health and scientific research has already linked exposure to these chemicals with severe health issues such as cancer, asthma, and adverse pregnancy and birth outcomes. Although scientific attention in recent years has largely focused on air pollution, researchers emphasize that land disposal is a critical and often overlooked source of human exposure.

Madrigal also highlighted the complexity of waste management: “Until now, there have been few summaries of the chemicals present in industrial waste disposal sites,” the researcher stated. “These sites are regulated, meaning facilities must adhere to multiple protective measures designed to limit the potential for human exposure. However, the potential exposure of those living in close proximity to these sites can vary depending on the compounds and the characteristics of the disposal site, including the age, operation, and management practices of the facility.”

Conclusion and Future Tasks

The authors of the study concluded that utilizing comprehensive, nationwide data is essential for understanding long-term exposure risks. Furthermore, the results indicate that far more grounded, data-driven public health and policy decisions are needed in the future regarding the management of industrial waste.

Source Used:

• https://www.uis.edu/news/study-links-toxic-waste-sites-marginalized-communities

• The official U.S. government website providing the raw data on which the article is based, the U.S. Environmental Protection Agency’s official toxics program, is available here: https://www.epa.gov/toxics-release-inventory-tri-program