The Trenton Water Depot in TrentonBy way of Ernest Scheyder WATFORD CITY, North Dakota (Reuters) – In cities across North Dakota, the wellhead of the North American vitality boom, the locals have taken to quoting the adage: "Whiskey is for consuming, and water is for fighting." It's no longer that they lack water, like Texas and California. They are swimming in it, and it’s free for the taking. But because the state's Bakken shale fields have grown, so has the struggle over who has the suitable to faucet into the multimillion-buck market to provide water to the energy sector. North Dakota now accounts for over 10 percent of U.S. …