Septic suitability in Grant County, OR

Very limited

Grant County, OR: USDA's soil survey calls 97.7% of the county "Very limited" for a septic leach field. Practically, that rules out a simple gravity system for most of the county - 97.7% of it sits in USDA's most-constrained bucket. The county spans 4,527.792 square miles, home to 7,093 people.

What this number does and doesn't tell you

Grant County's rating is an average across the whole county, not a promise about any one lot inside it. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Grant County: conventional vs. engineered cost

97.7% of Grant 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.

Grant County's rank among Oregon counties

Among the 3,058 rated counties on this site, Grant County, OR ranks 298 most-constrained nationally, and 4 of 36 within Oregon.

Before you act on this

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