I'm probably too late for this, since you are already boiling....but, hops need to be boiled in a low pH solution---wort, not water. A pH above 5.8 will extract less desirable flavors. This is according to Palmer, JZ, and Bamforth. Shaun OSullivan of 21A, says that he panics if his preboil wort is above 5.8 because the hops will taste nasty (his words). I've certainly never tried it.
Boiling hops in plain water will probably result in some strange (not good) tasting stuff. You could try acidifying your water down below 5.8, and see how that works. No matter what you do, I'd taste it before I poured it in the beer.