How much lead can infants on formula potentially receive from water?

Infants who are fed formula may receive a significant amount of lead from water, which can potentially be as high as 85%. This is particularly concerning because infants' immune systems and organ systems are still developing, and exposure to lead, even in small amounts, can have serious health repercussions. The preparation of infant formula often involves mixing powdered formula with water, and if that water is contaminated with lead, the resultant formula can contribute a substantial portion of lead exposure for the infant.

Lead can leach into drinking water from lead pipes, plumbing fixtures, and soldered joints, particularly in older homes. Since infants consume larger volumes of fluid relative to their body weight than adults do, and because their neurological and physical development can be severely impacted by lead exposure, understanding the potential lead content in the water used for formula is critical for ensuring child safety.

The other options suggest either a lower risk or variability, which does not accurately reflect the potential exposure risk that water can pose when making infant formula. Awareness of this critical issue helps caregivers make informed choices about water quality when preparing formula.