Why would one faucet have a different taste than others (what is it putting in the water, and is it dangerous?

I added two new faucets with new lines a year ago, why would water from one of them have a strong sweet taste, and the other taste the same as the rest of the house. Is this dangerous? It is no longer a new faucet, and I try running it for a while first. I am afraid to drink from this faucet, and won't let my pregnant wife drink from it. Should I be concerned?