Thank-you for these technical briefs. They demonstrate the wide range of techniques available for household water treatment.
It's interesting to see the possibility of using just exposing water to sunlight, expecting the UV light to kill most of the pathogens (although presumably this does nothing to aid the taste and appearance of water?).
I would be interested to hear people's experiences of the implementation of different water treatment technologies, since some technologies (particularly the removal of metals) seem fairly expensive and time consuming (although of course very important if water is contaminated with toxic levels of metals).
How much time and money are people happy to spend treating water before they take the risk of drinking it without treating it first?