According to the letter, in the event of a water main break or sewer backup, they claim that I coudl be liable for thousands of dollars. They are offering me an introductory rate of $12 per month. The letter looks official, but the fact they want me to enroll with a private company called American Water Resources makes me a little leary. Is this a scam? I'm not sure wheter this is a concern for a real estate lawyer. I called the one who I used when I bought the house, but she had never heard of this.