Use of a cumulative exposure index to estimate the impact of tap-water lead concentration on blood lead levels in 1- to 5-year-old children (Montreal, Canada)

Drinking water is recognized as a source of lead (Pb) exposure. However, questions remain about the impact of chronic exposure to lead-contaminated water on internal dose. The objective of the study was to estimate the relation between a cumulative water Pb exposure index (CWLEI) and blood Pb levels (BPb) in children aged 1 to 5 years.