Septic companies in Wilmington, DE

What the ground in Wilmington is like

The USDA soil survey rates mapped ground in Wilmington for septic drain-field suitability across roughly 11 square miles. About 56% of the rated ground is classed "Very limited", the survey records severe restrictions for a conventional drain field across most of that ground.

In Wilmington, the leading limit is slow water movement: effluent does not drain through the soil fast enough, so a conventional field can back up or pond when the ground cannot keep pace. The survey flags that limit on about 84% of the rated ground here.

The limiting features the survey records most often here:

• Slow water movement83.8%
• Depth to saturated zone52.5%
• Seepage, bottom layer31.8%
• Slope6.5%

This is survey data for mapped areas, not a substitute for a site evaluation on your own lot. Conditions on a single parcel can differ from the map.

USDA NRCS SSURGO, ENG Septic Tank Absorption Fields · 55.8% Very limited · Slow water movement · 32 map units · 10.9 sq mi · read 2026-08-30