Glacier County, MT's soil, for a septic absorption field

Very limited

Soil across 82.1% of Glacier County, MT rates "Very limited" in USDA's septic-absorption-field interpretation. That reading means a conventional system is a poor bet here - 82.1% of Glacier County lands in the strictest "very limited" bucket USDA uses. Glacier County, MT is 2,995.151 square miles with a population of 13,503.

What Glacier County's reading doesn't cover

Nothing about Glacier County, MT'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 Glacier County will actually do.

What a system would cost here

With 82.1% of Glacier 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.

Glacier County's rank among Montana counties

Nationally, Glacier County, MT is the 1,922-most-constrained of 3,058 rated counties for septic soil. Within Montana alone it ranks 24 of 54.

Further reading

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