Septic suitability in Major County, OK
Very limited
Major County, OK's SSURGO dominant class comes back "Very limited", covering 89.8% 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. The county spans 955 square miles, home to 7,569 people.
What this number does and doesn't tell you
Two lots a mile apart in Major County can carry different soil, even though they share one countywide rating. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Major County: conventional vs. engineered cost
89.8% of Major 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.
How Major County, OK compares
Among the 3,058 rated counties on this site, Major County, OK ranks 1,296 most-constrained nationally, and 18 of 77 within Oklahoma.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems