How do I calculate my sewer bill? by Harpers Ferry Bolivar PSD Team | Apr 14, 2023 | Hints & Tips | 0 comments There is a $20.63 service charge + $18.21 for every 1000 gallons of water used. Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.