Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. These contaminants are:

Microbes : Coli form bacteria, Fecal Coli form and E coli, Turbidity, Cryptosporidium

Radio nuclides : Alpha emitters, Beta/photon emitters, Radon, Combined Radium 226/228

In organics : Arsenic, Fluoride, Lead, Asbestos, Barium, Chromium, Copper, Mercury, Nitrite, Selenium

Volatile Organics : Benzene, Carbon Tetrachloride, Chlorobenzene, Dichloromethane, Ethylbenzene, Styrene, Tetrachlorethylene, Trichloroethylene, Toluene, Vinyl Chloride, Xylenes

Disinfectants : Chlorine, Chloramine, Chlorine Dioxide

Disinfection Byproducts : Total Trihalomethanes, Haloacetic Acids, Bromate, Chlorite