At nearly 2,000 times the price of tap water, bottled water is often extolled(激賞する)as the purer of the two, but a new study shows that some leading brands of the bottled beverage are just as contaminated as water from your kitchen sink. Lab tests of 10 bottled water brands detected 38 contaminants including bacteria, caffeine, acetaminophen(アセトアミノフェン), solvents(溶剤), fertilizer, plastic-making chemicals, and the radioactive element strontium. While several of these substances may have come from the tap water some of these companies use for their bottled water, others may have leached(滲出する、ろ過する)from the plastic bottles themselves.