Which cancer-causing agent may be found in older transformers?

The presence of polychlorinated biphenyls (PCBs) in older transformers is well-documented, leading to concerns regarding their cancer-causing potential. PCBs were widely used in electrical equipment due to their excellent insulating properties and heat resistance. However, over time, it was discovered that PCBs are toxic and can be carcinogenic, posing significant health risks, particularly when they enter the environment or are improperly handled.

Transformers manufactured before the ban on PCBs in the late 1970s often contain these substances, and if they leak or are disturbed, they can contaminate soil and water, leading to exposure for humans and wildlife. The risk of cancer, alongside other serious health issues, is associated with long-term exposure to PCBs, making it crucial for workers and others interacting with older transformers to understand these hazards.

While asbestos, lead, and formaldehyde also pose health risks, PCBs are the specific toxic agents associated with this type of equipment. Understanding the specific risks associated with PCBs helps ensure proper safety protocols and environmental precautions are taken in dealing with older electrical equipment.