Powder River County's SSURGO septic rating

Very limited

Powder River County, MT's SSURGO dominant class comes back "Very limited", covering 84% of the county. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 84% of Powder River County's land. For scale: 3,298.196 square miles and 1,734 people call Powder River County home.

Before you rely on this for one lot

USDA's survey covers the whole of Powder River County, MT at once, not any single address. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).

Budgeting for a system in Powder River County, MT

Powder River County's soil reading pushes the likely outcome toward an engineered system rather than a conventional one. Conventional systems run $3,000-$8,000 where they pass; where they don't, engineered alternatives (mound or aerobic treatment, whichever the health department requires) run $10,000-$40,000 - budget toward the higher figure until a perc test says otherwise.

How Powder River County, MT compares

Among the 3,058 rated counties on this site, Powder River County, MT ranks 1,784 most-constrained nationally, and 16 of 54 within Montana.

Further reading

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