tendency to increase in 2005. In table 4, we analyzed the
relation between B-Pb with respect to Pb concentrations
in soil after log transformation (2001, 2002 and 2006).
The correlations among B-Pb were significantly dependent
of Pb in soil at 0, 6, and 12 months of follow-up
but the relationship was lost at 60 months, where B-Pb
and Pb concentrations in soil were markedly lower than
previous times. Lead in drinking water has always had
very low concentrations in the Lagunera region, with
values below 5 μg/L [8].
Discussion
This report shows the timeline of lead exposure in children
resulting in lead environmental contamination in
Torreon, Coahuila. The case of lead poisoning in Torreon
captured international attention [15] and represented
a challenge to developing countries, many of