Normal Levels: In a typical healthy adult, the average concentration of lead in the blood is approximately 25 μg per 100 ml.

•Alarming Level: A concentration of 30 μg per 100 ml is considered alarming because it marks the threshold where lead starts becoming toxic to various bodily systems.

•Clinical Symptoms: When lead levels reach 70 μg per 100 ml, it is generally associated with severe clinical symptoms and significant health risks like anaemia, kidney damage, and nervous system dysfunction.