Arlington County, VA has no septic-suitability rating on file

Unrated

Unlike most of the 3,144 counties on this site, Arlington County, VA has nothing to show: The dominant soil here (often already-developed urban land) carries no septic-suitability interpretation from USDA - too rare a gap to guess at. A local percolation test is the only way to know.

Before you rely on this for one lot

USDA's survey covers the whole of Arlington County, VA at once, not any single address. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).

Budgeting for a system in Arlington County, VA

Without a countywide reading for Arlington County, both cost ranges below are worth knowing before a test, not just one. Conventional systems typically run $3,000-$8,000; where the soil doesn't allow one, engineered alternatives run $10,000-$40,000. A perc test decides which range applies.

Further reading

How this rating is built, and its real limits · What to check before buying rural land on septic