MDEQ ⟩ About MDEQ ⟩ Grants, Loans, Trust Funds ⟩ Guidance for the Design of Publicly Owned Wastewater Facilities Guidance for the Design of Publicly Owned Wastewater Facilities Select a document below: GeneralDesign of Conventional Gravity SewersDesign of Alternative SewersSewage Pumping StationsSewage Treatment WorksScreening, Grit Removal, and Flow EqualizationSettlingSludge Handling and DisposalBiological TreatmentDisinfectionWastewater Treatment Ponds (Lagoons)Supplemental Treatment ProcessesLand Application of WastewaterConstructed Wetlands