The investigation evaluates the efficiency attributed to some measures (improvements in environment, individual health habits) in reducing the risk of lead poisoning in the ceramics industry. The evaluation of the average levels of lead in the blood of 154 exposed workers was carried out in four plants at a time interval of six to eight months. The study considers the variations in relation to possible measures brought about during the interval. A reduction of environmental risk was in effect shown by a clear improvement in the blood lead levels, which still, however, exceeded the internationally recommended limits in many of the subjects. It was concluded that further improvements can only be made by reducing the lead content of the glazes used.