Any system for producing drinking water is fallible - why is this one special? Why should we be more suspicious of it than any other process? Just for one exa

Any system for producing drinking water is fallible - why is this one special? Why should we be more suspicious of it than any other process? Just for one example, I remember in 2004 when Dasani launched in the UK [1]. Aside from a bunch of other rather hilarious mistakes, their purification process (applied to regular mains drinking water) introduced bromate - a suspected carcinogen. [1] http://en.wikipedia.org/wiki/Dasani#United_Kingdom http://en.wikipedia.org/wiki/Dasani#United_Kingdom