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# Lead Concentration: Parts per Billion to Molar

CHEM-7H53HF

The EPA action level for lead in drinking water is 15.0 parts per billion ($ppb$).

What is the EPA action level for lead in molar concentration?

The atomic mass for lead is 207.2 AMU (atomic mass unit).

A

$7.24\times { 10 }^{ -2 }\space M$

B

$72.4\space nM$

C

$72.4\space \mu M$

D

$7.24\space nM$