Lane County's SSURGO septic rating

Very limited

Lane County, OR: USDA's soil survey calls 95.2% of the county "Very limited" for a septic leach field. Practically, that rules out a simple gravity system for most of the county - 95.2% of it sits in USDA's most-constrained bucket. For scale: 4,554.092 square miles and 382,396 people call Lane County home.

Before you rely on this for one lot

USDA's survey covers the whole of Lane County, OR 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 Lane County, OR

Lane 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.

Where this sits nationally

Among the 3,058 rated counties on this site, Lane County, OR ranks 648 most-constrained nationally, and 16 of 36 within Oregon.

Further reading

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