I Suspect Her Belief...

...may be thinner than the mysterious water coming from the tree. Call it a hunch, but I'm guessing her insurance agent was there to make sure the water from the tree wasn't damaging the house. And even his faith doesn't seem to extend to having a cool glass to drink. If she sees a rainbow later, can assume she's safe, or does the covenant not apply in this situation (I would postulate that deity-covenanted water issues are situationally specific as the flood, the Red Sea episode, and the water-to-wine seem to be more or less textually unrelated as far as the Bible is concerned without resorting to the deus ex machina-like cover that it's all god or by using some kabbalistic manipulation that is best left to Madonna)?

Her insurance agent dabbed drops of the water on a spider bite and the welt went away, she said.

"I just want to know if it is a healing tree or blessed water," she said. "That's God's water. Nobody knows but God." (Woman finds 'God's water' gurgling from tree - CNN)

As an aside, I may feel the need to claim this miracle water for myself, as a manifestation of my holy powers. After all, when I was younger I survived a horrible brush with scrambled eggs, M&Ms, spider bites, and RAID for cracks (for said biting spiders) that I was sure was going to kill me one morning at around 3:00 a.m. I didn't die, and that's probably a miracle. I was also in Texas this year. That's a lot of coincidence.