A topic not often brought up ...

A topic not often brought up is the percentage of people in the world who have access to clean water only through vendors of bottled water. This population typically has water at their tap but it is unsafe so their cultures are set up to purchase water from vendors in 5 gallon jugs which, as you can imagine, can become costly. 

The top 1 billion people in the world have access to clean drinking water from a tap in their home. The bottom 1 billion don't have access to water in their home so they're forced to transport it and clean it. But the remainder of the population - 5 billion are in the middle. They have access to water but cannot drink it as it is supplied to them. 

The cost of this can be a burden on those individuals. The global average cost of water is $1.65 per gallon whereas the average cost of tap water in the US is $.004 per gallon. The cost can add up in some parts of the world where the daily cost of water is as high as 18% of an individual's daily income. This causes a huge strain on individuals, communities, and economies.

The best solution for this would be to provide powerful disinfection products to those who have access to water that has not been treated properly. This can take form is several different methods and with new technology coming out in the disinfection market a solution to provide cheap clean water could be available.