Septic Tank Companies in Delaware
33 septic service companies across 20 cities — approximately 30% of Delaware homes use septic systems
Delaware's onsite wastewater systems are regulated by the Delaware Department of Natural Resources and Environmental Control (DNREC) through its Groundwater Discharges Section, which administers the state's Regulations Governing the Design, Installation and Operation of On-Site Wastewater Treatment and Disposal Systems. Delaware's flat, low-lying terrain and high water tables — especially in Sussex County, where more than half of homes rely on septic — create persistent challenges for conventional drain field systems. The sandy, permeable soils of southern Delaware drain quickly but offer less natural filtration, while the northern New Castle County region has heavier clay soils that require different engineering approaches.