Murray County, OK's soil, for a septic absorption field

Very limited

Soil across 89.4% of Murray County, OK rates "Very limited" in USDA's septic-absorption-field interpretation. Practically, that rules out a simple gravity system for most of the county - 89.4% of it sits in USDA's most-constrained bucket. Murray County, OK is 416.375 square miles with a population of 13,754.

What Murray County's reading doesn't cover

This is a countywide, area-weighted figure across every soil survey map unit in Murray County, OK - never a reading for one specific parcel. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Murray County will actually do.

What a system would cost here

With 89.4% of Murray County rating "Very limited", a standard gravity system is not a safe assumption here. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.

Murray County's rank among Oklahoma counties

Nationally, Murray County, OK is the 1,336-most-constrained of 3,058 rated counties for septic soil. Within Oklahoma alone it ranks 21 of 77.

Further reading

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