Question

Lead concentration in blood is considered alarming if it is

• A. $20\,\mu g/100\,mL$
• B. $30\,\mu g/100\,mL$
• C. $4-6\,\mu g/100\,mL$
• D. $10\,\mu g/100\,mL$

Answer 1

Answer: (B)

$30\,\mu g/100\,mL$

Answer 2

The concentration of lead in blood averages about $25 \,\mu g/100\,mL$ . Increase to $70\,\mu g/100\,mL$ is generally associated with clinical symptoms. Hence, a level of $30\mu\, g/100\,mL$ is considered alarming. The chief sources of Pb in water are the effluents of lead and lead processing industries.