Power County, ID's soil, for a septic absorption field

Very limited

62.9% of Power County, ID's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 62.9% of Power County's land. Power County, ID is 1,403.826 square miles with a population of 8,381.

What Power County's reading doesn't cover

Nothing about Power County, ID's SSURGO figure applies to a specific address - it's a county-wide average. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Power County will actually do.

What a system would cost here

With 62.9% of Power 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.

Where this sits nationally

Nationally, Power County, ID is the 2,667-most-constrained of 3,058 rated counties for septic soil. Within Idaho alone it ranks 42 of 44.

Before you act on this

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