Blood lead (7439921) concentrations were determined in 12 professional stained glass workers (SIC-3211), 4 family members of the professionals, and 5 hobbyists. Blood samples were collected and analyzed for lead, erythrocyte protoporphyrin, and hematocrit. Dust samples from a stained glass studio and from the home of one worker also were analyzed for lead. Blood lead concentrations were significantly greater in the professionals compared to the other two groups. Erythrocyte protoporphyrin values also were slightly increased in the professionals. Hematocrit values were normal in all groups. In the professionals, blood lead concentrations were correlated with years of glass work, work hours per week, and percentage of work involving lead. Mean lead concentrations in the workshop and household dust samples were 10696 and 355 parts per million, respectively. The authors conclude that stained glass workers are at increased risk for lead exposure. They recommend preventive measures such as the use of ventilation, good personal hygiene habits, and careful cleaning of work clothes.