What Caribou County, ID's soil rates for a septic system

Very limited

In Caribou County, ID, 76.3% of the surveyed land carries a "Very limited" rating for a standard septic drain field. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 76.3% of the county. Caribou County, ID is 1,764.194 square miles with a population of 7,239.

What Caribou County's reading doesn't cover

Nothing about Caribou 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 Caribou County will actually do.

What a system would cost here

With 76.3% of Caribou 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 Caribou County, ID compares

Nationally, Caribou County, ID is the 2,219-most-constrained of 3,058 rated counties for septic soil. Within Idaho alone it ranks 36 of 44.

Further reading

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