Do you have a fairly shallow well? If so, drilling deeper will often locate nitrate-free water. If that is not an option, ion exchange is the only feasible way to remove nitrates from all of the water in the house. Discharge water from regeneration will be, however, high in nitrates which is a disposal issue in many areas. Check that out for yourself to ensure you have the correct information.

RO is another option, but you don't seem to like that idea. If the major concern is only one faucet, you can install faucets wherever you want, one at each sink if you like. However, that will entail more holes in your counters. Since this is just a weekend house, the bottled water dispenser is probably your easiest, cheapest solution.

Thanks AW. The well is new and definitely not shallow -- 100+ feet. We had hoped for better water than the old 60 foot well (now used for landscaping) -- it is better, but still not great.

We are going with an ion exchange with a softener and Ph treatment.

I hope everything works out for you - water treatment can certainly get tricky. I admit I did laugh a little when you said you well was not shallow. That would be quite shallow here. My well is 283 ft and that is not particularly deep in my area, but we have very sandy soil in my part of the world - have to go deeper to get to good water. It's all relative.

My friend's well is 600ft (supposedly) but the pump is around 300ft.

Thanks for the input all. The whole-house solution will be installed next week. And after AW's observation about well depth, I learned that I was sadly mistaken (perhaps explaining why it cost almost $10K to drill the well). We are on a 100+ foot bluff; the well is 100 feet below the water level, or about 250 feet.