Here's some helpful information on our private septic systems. Everyone in Dunewood uses a private septic system. There is no city sewer service. We should all be pumping our tanks every 3 years. If members don't know where their system is, they can contact the county health department for help locating it. The health dept has maps showing approximately where they were installed on each property. A septic company can find it fairly quickly once they know the general location.