The Standard filter is ideal for any in or out-door use; like traveling, hiking, biking, camping, fishing or for emergency purposes. It can be used with any type of water source; tap or rainwater, rivers, streams or even lakes (Excluding salt water). It is designed for use with water that is non-turbid, non-stagnant. It removes up to 99.99% of contaminants and pollutants found in fresh water supplies including Aesthetics such as chlorine, Sediment and dirt; Chemicals (VOC's) such as DDT, MTBE, Benzene, Chloroforms (THM's); Dissolved Solids (heavy metals) such as Arsenic, Lead, Mercury, Copper, Zinc, Aluminum, Chromium 6 and up to 99.9% of Biologicals (pathogens) such as Giardia and Cryptosporidium. Removes up to 90% of fluoride.