Portable water purification devices better described as
point-of-use (POU)
water treatment systems and
field water disinfection techniques are self-contained, hand-carried units used by recreational enthusiasts, military personnel, survivalists, and others for
water purification when they need to obtain
drinking water from untreated sources (e.g. rivers, lakes,
groundwater etc.). These personal devices and methods attempt to render water potable (i.e. safe and palatable for drinking purposes - without disease-causing
pathogens).