Gregg County, TX's soil, for a septic absorption field

Very limited

Soil across 94% of Gregg County, TX rates "Very limited" in USDA's septic-absorption-field interpretation. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 94% of Gregg County's land. Gregg County covers 273.38 square miles and counts 126,679 residents.

This is a county figure, not a parcel figure

This is a countywide, area-weighted figure across every soil survey map unit in Gregg County, TX - never a reading for one specific parcel. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Gregg County.

System cost, conventional vs. engineered

Given Gregg County's rating, plan for the engineered-system range rather than the conventional one. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.

How Gregg County, TX compares

Nationally, Gregg County, TX is the 781-most-constrained of 3,058 rated counties for septic soil. Within Texas alone it ranks 52 of 253.

Related guides

How this rating is built, and its real limits · Conventional vs. engineered septic systems