Breastfeeding Topics which is a newsletter put out by the Illinois
Dept. of Public Health, has an article about lead in there recent
issue.  You can probably attain a copy by writing to them.
Illinois Department of Public Health
Division of Health Assessment and Screening
535 W. Jefferson St.
Springfield, Il.   62761

Recapping the article,  lead was found to be higher in colostrum than
mature milk.(study by Sternowsky and Wessolowski)  Lead is an ionized
metal that is tightly bound to red blood cells.  The milk plasma ratio
for lead is 0.2-1.  Small amount.  Lead has a long half-life but this
doesnt neccessarily mean that higher amounts would be transferred.

Commercial formulas have similar levels of lead to breastmilk, however
lead levels may be higher in bottlefed infants because of the lead
levels in the water used to prepare the formula.

Mom can test her milk at
National Medical Services
2300 Stratford Avenue
Willow Grove, PA   19090

Phone 800-522-6671 or fax 215-657-2972

In short lead levels are low in breastmilk and the benefits far
outweigh concerns of infant exposure.

Assunta Osterholt, IBCLC
http://www.earthlink.net/~oster6