Cascade County, MT Septic Rating

Septic suitability in Cascade County, MT

Very limited

Cascade County, MT's SSURGO dominant class comes back "Very limited", covering 88.5% of the county. Expect the ground itself to work against a plain gravity system; that share is already USDA's strictest bucket, not a lesser constraint layered on top. The county spans 2,698 square miles, home to 84,523 people.

What this number does and doesn't tell you

Nothing about Cascade County, MT's SSURGO figure applies to a specific address - it's a county-wide average. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Cascade County: conventional vs. engineered cost

88.5% of Cascade County carrying a "Very limited" reading changes the realistic budget here. 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.

Where this sits nationally

Among the 3,058 rated counties on this site, Cascade County, MT ranks 1,417 most-constrained nationally, and 6 of 54 within Montana.

Further reading

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