What is the main reason for using lead-free solder?

The primary reason for using lead-free solder is to comply with safety regulations that have been established to protect public health and the environment. Over the years, numerous studies have shown that lead can pose serious health risks, particularly in water systems where lead can leach from soldered joints into drinking water. Various regulations, including the Safe Drinking Water Act, have mandated the reduction or elimination of lead in plumbing materials to ensure safer drinking water for consumers. This shift towards lead-free solder is a direct response to these health concerns, promoting safer construction and public health standards in plumbing systems.

While other options, such as allergic reactions, cost reduction, and durability, may have some relevance, they do not directly address the critical regulatory requirements that led to the widespread adoption of lead-free solder. The focus on safety regulations emphasizes a collective commitment to health, safety, and environmental integrity in plumbing practices.