Maine Subsurface Wastewater Disposal Policies



  • Guidance on 2023 Rule Revisions Addressing Temporary Portable Toilets (Chapter 241 – Section 5(I)(6))
    In the 2023 amended rules, the Department added a definition for temporary portable toilets, as well as restrictions concerning temporary portable toilets being used as permanent wastewater disposal solutions.  Click here to view or download the guidance information. (PDF)
  • Replacement Subsurface Wastewater Disposal Systems on Offshore Islands
    This guidance document addresses designing replacement subsurface wastewater disposal systems on offshore islands. In particular, those situations in which an existing overboard discharge, licensed by the Maine DEP, is being replaced by a subsurface system designed pursuant to the Subsurface Wastewater Disposal Rules, CMR 241.  Learn more. (PDF)


Updated 12/5/2023