Report from Australia about monitoring this kind of thing: http://www.abc.net.au/news/2016-08-01/sewage-tests-reveal-wa-drug-problem/7677296 http://www.abc.net

Report from Australia about monitoring this kind of thing: http://www.abc.net.au/news/2016-08-01/sewage-tests-reveal-wa-drug-problem/7677296 http://www.abc.net.au/news/2016-08-01/sewage-tests-reveal-wa... "West Australians are using about two tonnes of methamphetamine each year with a street value of $2 billion, wastewater tests have revealed."