I’d like to know as well. We’re storing water from our tap in 2 liter pop bottles - I’d like to know how long that water would be safe to drink.
I’m not much into buying jugs of water that have probably come from a tap somewhere else - and then having to lug those home.
Very very low tech.
Tanzanian villagers have begun using an energy-saving method to sterilise their drinking water - leaving the water under the sun.
http://news.bbc.co.uk/2/hi/africa/4786216.stm
For home stuff, Big Berky.