Washington County's SSURGO septic rating

Very limited

Washington County, NC's SSURGO dominant class comes back "Very limited", covering 81.6% of the county. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 81.6% of Washington County's land. The county spans 346.51 square miles, home to 10,654 people.

What this number does and doesn't tell you

Washington County's rating is an average across the whole county, not a promise about any one lot inside it. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Washington County: conventional vs. engineered cost

81.6% of Washington 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, Washington County, NC ranks 1,963 most-constrained nationally, and 36 of 97 within North Carolina.

Before you act on this

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