Sewage Study Yields Surprising Info About Drug Use / Join Together, 24 June 2008
http://www.jointogether.org/news/headlines/inthenews/2008/sewage-study-yields.html
"Likened to a citywide drug test, the studies estimate drug use based on the chemicals excreted in feces and urine by community residents. Researchers have found, for example, that Los Angeles has more cocaine in its sewage than many European cities, and that London's heroin usage may be higher than in cities in Italy and Switzerland. More methamphetamine apparently is used in Las Vegas than in Omaha, Neb., or Oklahoma City, Okla., the studies suggest. "Every sample has one illicit drug or another, regardless of location," said researcher Jennifer Field of Oregon State University. "You may see differences from place to place, but there's always something"."