Then don't worry about it. Just use the thing, keep it away from kids. :P

As for the non-toxic question you raised, I'm gonna throw a shocker at you- if you have ground water that comes through granite, you have uranium in the water! Yes, uranium, the radioactive no-no that powers half of the only hope we have of breaking the petrochem dependency and makes up the "special sauce" that makes a plain bomb an atomic bomb.

Here's the thing. Uranium is naturally occuring. It is in your body anyway, all the elements are until you get to the transuranics. But if it is in small enough doses, it isn't dangerous. Used as per reccommended guidelines with all due care and respect for it's innate properties and in suitably moderate ammounts, pretty much everything is non-toxic. As part of that due care and respect, you don't chew on the stuff, and not just becuase it will burn your tounge. :P

Looked at another way, would people spend billions of dollars on bottled water if there was a warning on it? You know, something like "Hazard: May cause death"? I can drown someone in four inches of Icelandic glacier water that cost me umpty dollars as easily as I can four inches of Jersey storm runoff that the EPA will give superfund money to take off my hands. <img src="/images/graemlins/smile.gif" alt="" />