After being hired to help in a lawsuit, biological warfare expert Dan Kaszeta found that Las Vegas pools are a serious health hazard. His samples contained alarming levels of Giardia and Cryptosporidium, both highly resistant to chlorine. A huge number of metabolites from human urine. Fecal matter, human, mammal, and avian. Trace amounts of cocaine, ketamine, and several different opiates. He even found traces of Adenoviruses (the stuff you get from tick bites).