Maybe so but I prefer to have several options when it comes to water. The water compartment of my BOB includes a SteriPEN Adventurer with regular and rechargeable batteries (with solar charger), a Katadyn Vario filter, Katadyn Micropur tablets, straw type filters and boiling/fire starting supplies.

At home I keep a 2-4 day supply of bottled water as well as a Katadyn Drip Gravidyn. Knock on wood, our municipal water supply has always been very reliable and the reservoirs that feed it are nearby if distribution is interrupted.

Running out of potable water is not an option.