Septic companies in Johnson City, TN

What the ground in Johnson City is like

The USDA soil survey rates mapped ground in Johnson City for septic drain-field suitability across roughly 44 square miles. About 82% of the rated ground is classed "Very limited", meaning the soil has one or more features unfavorable for a conventional drain field, and the limits generally cannot be overcome without major soil reclamation, special design or expensive installation.

In Johnson City, the leading limit is slope: the ground falls steeply enough that a level trench line is hard to hold. A drain field has to sit across the grade without concentrating flow downhill; on steeper parcels that layout gets tighter. The survey flags that limit on about 92% of the rated ground here.

The limiting features the survey records most often here:

• Slope91.7%
• Slow water movement87.2%
• Depth to bedrock14.3%
• Depth to saturated zone9.1%

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 · 82.1% Very limited · Slope · 107 map units · 43.87 sq mi · read 2026-08-30