Agbogbloshie Soil Contaminated by Toxic Heavy Metals: Study Reveals Environmental Hazards

Accra: A 2026 scientific study has found concerning levels of toxic heavy metals in soils at Agbogbloshie, with mercury measured at 0.53 milligrammes per kilogramme (mg/kg) and cadmium at 1.2 mg/kg, pointing to ongoing environmental risks linked to informal electronic waste processing. The study indicates that the contamination is associated with dismantling and burning mobile phones, telecom equipment, and other electronic waste materials at the site. According to Ghana Web, the 2026 peer-reviewed environmental study led by Worlanyo Kwabena Agbosu from the University of Education, Winneba, found that soil samples collected from the area not only contained mercury and cadmium but also other heavy metals linked to electronic components, such as lead, arsenic, chromium, nickel, copper, zinc, and iron. These substances are released during open burning of insulated wires and circuit boards, as well as manually dismantling devices, highlighting that the contamination is largely human-driven, with evidence pointin g to e-waste handling practices as the primary source rather than natural soil composition. The study reveals that the 0.53 mg/kg quantity of mercury recorded is above the United States Environmental Protection Agency (US EPA) guideline of 0.2 mg/kg, while cadmium levels of 1.2 mg/kg reached thresholds considered hazardous for soil quality. Environmental assessments of the area also indicate that contamination is not confined to the immediate scrapyard. Heavy metals have been observed spreading beyond active burning and dismantling zones into surrounding residential communities, with the ability to enter nearby water bodies and agricultural spaces. Health risks associated with exposure to these contaminants include neurological damage linked to lead and mercury, kidney and liver complications, respiratory illness from toxic dust and fumes, and increased long-term cancer risks associated with arsenic and cadmium exposure. Children and informal workers operating at the site are also considered particularly vu lnerable due to direct contact with contaminated soil and materials. Across multiple studies over the past decade, researchers have consistently identified Agbogbloshie as a hotspot for heavy metal pollution, with contamination levels frequently exceeding international safety guidelines. Earlier studies by Matt Dodd, Lydia Otoo Amponsah, Stephen Grundy, and Godfred Darko found elevated concentrations of arsenic, cadmium, copper, and lead in soils at the site. Another spatial contamination assessment led by Samuel M. Atiemo detected widespread heavy metal pollution extending beyond burning zones into nearby residential and public areas. Toxic heavy metals released into the soil can remain for hundreds to thousands of years, continuously entering water bodies and crops unless deliberate clean-up efforts are undertaken. Dr. Esmond Wisdom Quansah, the Country Director of Pure Earth, explained that the persistence of substances such as mercury, lead, cadmium, and arsenic is driven by their molecular properties, allowing them to remain stable in the environment without breaking down. 'Once these heavy metals are deposited, they do not go away. They remain there until they are cleaned up. Some can remain there for thousands of years,' Dr. Quansah said, cautioning that continued exposure is risky. Pure Earth initially conducted research in six regions of the country to assess heavy metal pollution in communities affected by illegal mining activities. The study found widespread contamination in soil, water, air, crops, and fish, with heavy metal levels in many locations exceeding acceptable limits.