posted by Hannah .
The maximum concentration set by the U.S. Environmental Protection Agency for lead in drinking water is 15 ppb.
What is this concentration in milligrams per liter?
How many liters of water contaminated at this maximum level must you drink to consume 1.0 ug of lead?
1 mg/L is 1 ppm.
Therefore, 1 ppb is 0.001 mg/L. Check my thinking.