Niobrara County, WY's soil, for a septic absorption field

Very limited

In Niobrara County, WY, 59.2% of the surveyed land carries a "Very limited" rating for a standard septic drain field. That reading means a conventional system is a poor bet here - 59.2% of Niobrara County lands in the strictest "very limited" bucket USDA uses. Niobrara County covers 2,626.028 square miles and counts 2,301 residents.

This is a county figure, not a parcel figure

USDA's survey covers the whole of Niobrara County, WY at once, not any single address. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Niobrara County.

System cost, conventional vs. engineered

Given Niobrara County's rating, plan for the engineered-system range rather than the conventional one. 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.

Niobrara County's rank among Wyoming counties

Nationally, Niobrara County, WY is the 2,736-most-constrained of 3,058 rated counties for septic soil. Within Wyoming alone it ranks 17 of 22.

Before you act on this

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