I came across a really interesting article today about how artificial sweeteners are making their way into the drinking water supply.
"Sewage treatment plants fail to remove artificial sweeteners completely from waste water. What’s more, these pollutants contaminate waters downstream and may still be present in our drinking water... Until now, only sucralose has been detected in aquatic environments."
The verdict is still out on whether artificial sweeteners pose any health risks, but this really exemplifies the problems with water purification as food science (and science in general) evolves.
The full story can be found here:
http://www.sciencedaily.com/releases/2009/06/090617123650.htm