Septic soil in Tippah County, MS, by the numbers
Very limited
98.9% of Tippah County, MS'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 - 98.9% of it sits in USDA's most-constrained bucket. Tippah County, MS is 457.822 square miles with a population of 21,423.
What Tippah County's reading doesn't cover
USDA's survey covers the whole of Tippah County, MS at once, not any single address. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Tippah County will actually do.
What a system would cost here
With 98.9% of Tippah County rating "Very limited", a standard gravity system is not a safe assumption here. 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 Tippah County, MS compares
Nationally, Tippah County, MS is the 108-most-constrained of 3,058 rated counties for septic soil. Within Mississippi alone it ranks 5 of 82.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems