There is an area in Hawthorn Woods where homeowners had well issues. Due to this issue, water lines were put in for those properties. Some of the homeonwers paid the full amount for the new water service where as others opted to have it as part of the "water" bill. Therefore, those homes who opted to have the sewer as part of their water bills will pay over the next 10 years or so. I strongly suggest that if you are looking for a home in HW, make sure you receive FULL disclosure. You can also contact the Village of Hawthorn Woods and they will let you know if the home was part of the new sewer project. Good luck!