Pets - Toxicology question

We added a fire-bellied toad to the aggregation of animal companions at our house. I was surprised to read that, yes, they are poisonous. The information on the internet was all over the board on taking care of this creature, but nowhere did I see exactly how poisonous the toad is.

After all, they didn't check my name on a terrorist list, or give me a seven day waiting period before buying the toad, so I figure that if it succumbs and goes to it's circular watery grave I won't be contaminating the drinking water of the Great Lakes....or will I? Hmmmmm.