Blaine County's SSURGO septic rating
Very limited
Blaine County, OK's SSURGO dominant class comes back "Very limited", covering 81.4% of the county. A standard gravity system routinely fails on ground like this; the same share of the county falls in USDA's worst absorption-field bucket outright. For scale: 928.463 square miles and 8,573 people call Blaine County home.
Before you rely on this for one lot
USDA's survey covers the whole of Blaine County, OK 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 Blaine County, OK
Blaine 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 Blaine County, OK compares
Among the 3,058 rated counties on this site, Blaine County, OK ranks 1,974 most-constrained nationally, and 49 of 77 within Oklahoma.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems