Septic companies in Raleigh, NC

What the ground in Raleigh is like

The USDA soil survey rates every mapped parcel for its suitability as a septic drain field. Across Raleigh's 152.3 square miles, 64.2% of the rated ground is classed "Very limited", meaning restrictions severe enough that a conventional field is often unsuitable and an engineered system may be required.

The limiting features the survey records most often here:

• Slow water movement96.3%
• Slope25.4%
• Depth to bedrock12.3%
• Seepage, bottom layer12.1%

The most common soil series underfoot: Beltline, Wedowee, Pacolet.

This is survey data for the area, not a substitute for a site evaluation on your own lot. A soil scientist or your county health department tests the actual parcel, and the result can differ from the map.

USDA NRCS SSURGO, ENG Septic Tank Absorption Fields · 85 map units · read 2026-08-30