I Smoked Marijuana For About A Month Now, How Long Will It Be In My System?

The drug will remain in your urine for 30 days after the date of the last inhalation.

Could be in your system anywhere from 30 days to 90 days.

It will never really leave your system.  No detection in urine or blood takes from 30 to 90 days.  Permanent damage is created in the proteins that create the shell on sperm and on female eggs, resulting in pregnancies that are either never carried to term, or if carried to term, results in severe mental retardation.  Although your job may be safe it is very likely that you will bring retarded children into the world if you procreate.  You should warn the opposite sex of your condition before having sexual relations.