As a result of new and more sensitive methods for detecting chemicals and t
he development of scientific methods that better determine their biological
effects, unregulated contaminants that were previously undetected by water
professionals have become of interest to the public and the press. A sourc
e water issue that has taken a high profile in Las Vegas, Nev., relates to
chemicals with the potential to act as endocrine disrupters. Las Vegas is o
ne of the first large urbanized areas in the United States where studies ha
ve been conducted to determine the presence of these chemicals in the drink
ing water supply. This article discusses the potential health effects, dete
ction methods, and regulatory considerations of these chemicals.