Charles City County, VA: the USDA septic-suitability picture
Very limited
USDA puts Charles City County, VA at "Very limited" for septic absorption fields, the dominant reading across 79.5% of the county's soil. Practically, that rules out a simple gravity system for most of the county - 79.5% of it sits in USDA's most-constrained bucket. The county spans 182.901 square miles, home to 6,564 people.
What this number does and doesn't tell you
Nothing about Charles City County, VA's SSURGO figure applies to a specific address - it's a county-wide average. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Charles City County: conventional vs. engineered cost
79.5% of Charles City 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.
How Charles City County, VA compares
Among the 3,058 rated counties on this site, Charles City County, VA ranks 2,064 most-constrained nationally, and 45 of 110 within Virginia.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems