Lead in drinking water contributes what percent range to a child's total lead exposure?

Lead in drinking water contributes what percent range to a child's total lead exposure?

• A. 0 to 5 percent
• B. 60 to 80 percent
• C. 5 percent to more than 50 percent
• D. 90 to 100 percent

Answer: (C)

The amount of a child’s lead exposure that comes from drinking water can vary a lot depending on the home’s plumbing and on other lead sources present. If a home has lead pipes, lead-containing solder or fixtures, and water that sits in contact with them, lead can leach into the water and become a sizable part of total exposure. In many homes, however, the largest sources of lead exposure come from lead-based paint and the dust it creates, so water contributes a smaller share. Because of these factors, drinking water can account for roughly 5% of a child’s total lead exposure in some cases, and more than 50% in others. This variability is why the correct answer spans a wide range. To reduce exposure, it helps to flush taps, use cold water for drinking and cooking, and consider lead-reducing interventions like filters certified for lead or replacing lead-containing pipes.

The amount of a child’s lead exposure that comes from drinking water can vary a lot depending on the home’s plumbing and on other lead sources present. If a home has lead pipes, lead-containing solder or fixtures, and water that sits in contact with them, lead can leach into the water and become a sizable part of total exposure. In many homes, however, the largest sources of lead exposure come from lead-based paint and the dust it creates, so water contributes a smaller share. Because of these factors, drinking water can account for roughly 5% of a child’s total lead exposure in some cases, and more than 50% in others. This variability is why the correct answer spans a wide range. To reduce exposure, it helps to flush taps, use cold water for drinking and cooking, and consider lead-reducing interventions like filters certified for lead or replacing lead-containing pipes.