Pipes and vessels carrying drinking water are not allowed to have more than what percentage of lead in their solder?

• A. 1%
• B. 5%
• C. 10%
• D. 0.5%

Answer: (A)

The correct answer emphasizes the strict regulations in place to limit the amount of lead in solder used for pipes and vessels carrying drinking water. Solder with more than 1% lead is considered unsafe because lead is a toxic metal that can leach into the water supply and pose serious health risks. By setting the limit at 1%, regulatory agencies aim to protect public health and minimize the risk of lead poisoning, especially in vulnerable populations such as children and pregnant women. Lowering the permissible lead content in solder helps ensure that drinking water remains safe and free from harmful contaminants. This standard reflects a growing awareness of the health impacts of lead exposure and a commitment to improving water quality for all consumers.