IMPACT OF REDUCTION OF LEAD IN GASOLINE ON THE BLOOD AND HAIR LEAD LEVELS IN THE POPULATION OF TARRAGONA-PROVINCE, SPAIN, 1990-1995

The limitation in the use of lead in Spanish gasoline has induced a re sulting decrease in atmospheric lead concentrations, a remarkable redu ction in the lead levels of edible vegetables, as well as a marked dec rease in the dietary lead intake of the population of Tarragona Provin ce (Catalonia, N.E. Spain). The present study evaluates the impact of such decreases on blood lead values and hair lead concentrations in an adult and children population of that region. A total of 250 adult pa rticipants between 16-65 years of age and 252 children were included i n the study. Blood and hair samples were subjected to lead analyses by graphite furnace atomic absorption spectrophotometry and inductively coupled plasma spectrometry, respectively. A substantial decline in bo th, blood lead levels in adults (47.5%) and lead concentrations in chi ldren's hair (53%) was observed. During the period 1990-1995, blood le ad levels were reduced from 12.0 mu g dl(-1) to 6.3 mu g dl(-1), while the hair lead concentrations decreased from 8.8 mu g g(-1) to 4.1 mu g g(-1). These decreases were noted for all the subgroups (sex, age an d place of residence) examined, and were mainly attributable to the re duced leaded gasoline consumption.