Septic suitability in Johnson County, WY

Very limited

Johnson County, WY: USDA's soil survey calls 76.2% of the county "Very limited" for a septic leach field. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 76.2% of the county. The county spans 4,154.152 square miles, home to 8,803 people.

What this number does and doesn't tell you

USDA's survey covers the whole of Johnson County, WY at once, not any single address. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Johnson County: conventional vs. engineered cost

76.2% of Johnson 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.

Where this sits nationally

Among the 3,058 rated counties on this site, Johnson County, WY ranks 2,225 most-constrained nationally, and 6 of 22 within Wyoming.

Before you act on this

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