Bristol Bay Borough, AK's soil, for a septic absorption field

Very limited

67.8% of Bristol Bay Borough, AK's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. That reading means a conventional system is a poor bet here - 67.8% of Bristol Bay Borough lands in the strictest "very limited" bucket USDA uses. Bristol Bay Borough, AK is 481.382 square miles with a population of 884.

What Bristol Bay Borough's reading doesn't cover

Two lots a mile apart in Bristol Bay Borough can carry different soil, even though they share one countywide rating. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Bristol Bay Borough will actually do.

What a system would cost here

With 67.8% of Bristol Bay Borough 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.

Bristol Bay Borough's rank among Alaska counties

Nationally, Bristol Bay Borough, AK is the 2,536-most-constrained of 3,058 rated counties for septic soil. Within Alaska alone it ranks 9 of 10.

Before you act on this

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