Dorevitch et al. 2024 — Lead in drinking water from particulate spike simulation
This study simulated lead particulate spikes in drinking water to evaluate whether existing sampling protocols adequately capture episodic lead exposure from corroding lead service lines and household plumbing. The authors ran controlled experiments spiking water samples with lead particles at defined concentrations and compared detection rates under standard first-draw vs. sequential flushing sampling protocols. The paper identifies methodological gaps in regulatory monitoring that may cause underestimation of lead exposure from drinking water, particularly for vulnerable populations including infants and children consuming formula reconstituted with tap water.
Key numbers
Lead concentration spikes were introduced at controlled levels to simulate disturbance events (e.g., water hammer, pressure fluctuations). First-draw sampling missed significant fractions of particulate lead under several simulated conditions. Sequential flushing samples better captured the range of exposure. DOI: 10.1038/s41370-023-00534-0.
Methods (brief)
Controlled laboratory experiment using US residential plumbing analogues. Particulate lead introduced at calibrated concentrations. Standard first-draw and sequential sampling protocols compared. ICP-MS used for lead quantification.
Implications
Certification: Directly relevant to drinking water used in infant formula reconstitution and food processing. Documents how standard monitoring may systematically underestimate Pb exposure from water. Courses: Useful for supply-chain module on water quality and its role in finished product contamination. App: Informs risk flag for products where reconstitution water source is variable. Microbiome: Not addressed.