What Sterling County, TX's soil rates for a septic system

Very limited

91.5% of Sterling County, TX's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. Practically, that rules out a simple gravity system for most of the county - 91.5% of it sits in USDA's most-constrained bucket. Sterling County covers 923.449 square miles and counts 1,387 residents.

This is a county figure, not a parcel figure

USDA's survey covers the whole of Sterling County, TX at once, not any single address. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Sterling County.

System cost, conventional vs. engineered

Given Sterling 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 Sterling County, TX compares

Nationally, Sterling County, TX is the 1,109-most-constrained of 3,058 rated counties for septic soil. Within Texas alone it ranks 79 of 253.

Before you act on this

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