Lead in playground dust and on the hands of schoolchildren.

Measurements of the quantity of lead on the hands of schoolchildren and of the concentration of lead in dust from school playgrounds have been carried out; the hand-lead was collected by wiping with a moist tissue. When hand-lead and dust-lead values were averaged for each school, a statistically significant relationship between the two sets of means was obtained. Some limited measurements of size distribution of the dust particles on the children's wipes were also made; these indicated that most of the particles were less than 10 micron in diameter.