This is an interesting development: The Ninth U.S. Circuit Court of Appeals in San Francisco ruled against a municipality that argued it was entitled to maintain a drug-free workplace by requiring all job candidates to be screened for drugs and alcohol. The case started when the city withdrew a job offer to a librarian who had refused to pee in a cup. The Court has decided that there needs to be a compelling reason related to the duties of the job to justify drug testing. See: Court ruling limits employment drug testing and the decision here.