Regulatory Guidance

Delaware Department of Natural Resources and Environmental Control (DNREC) Division of Water
Regulatory division for oversight of On-Site Waste Water Treatment and Disposal Systems (OWTDS) / Septic and Large OWTDS (LOWTDS)

DNREC Division of Watershed Stewardship – Sediment and Stormwater
Regulatory division for oversight of stormwater and erosion and sediment control

DNREC Wetlands and Subaqueous Lands
Regulatory division for oversight of certain wetland activities in Delaware


Mid-Atlantic Association of Professional Soil Scientists (MAPSS)
Local group of Academic, government, and consulting soil scientists.

Soil Science Society of America (SSSA)
National association of soil science, professional soil certification provider

National On-Site Wastewater Recyclers Association (NOWRA)

Delaware On-Site Wastewater Recyclers Association (DOWRA)

Society of Wetland Scientists (SWS)

EPA – Septic System Information

Natural Resource Conservation Service (NRCS)
Federal agency providing guidance for soil and numerous other natural resources

Helpful Information/Tools

Web Soil Survey – Online tool provided by the NRCS
Mapping tool for identifying mapped soils within an Area of Interest (AOI)

NRCS – Official Series Descriptions
Detailed descriptions of soil series