Under the laws of all states in this country, the billing information of a person with respect to his or her utility charges is subject to one's expectation of privacy as to the person who pays the bill.From what you have written, the water company should not have provided use and billing information with respect to your water use to a third party absent your written consent to do so and/or a subpeona issued and served upon you in conjunction with a lawsuit.You might consider making a complaint against the water company with your state's department of public utilities.