The result of your conversion between pound/cubic mile and microgram/liter appears here
To convert between Pound/cubic Mile and Microgram/liter you have to do the following:
First divide 0.45359237/(((0.0037854118/231)*1728*27)*5451776000) / 1.0E-9/0.001 = 0.00010882
Then multiply the amount of Pound/cubic Mile you want to convert to Microgram/liter, use the chart below to guide you.
Symbol: lb/mi³
No description
Symbol: µg/l
No description