Edgefield County, SC flood risk explained
Flood hazard in Edgefield County sits at the 31.3th national percentile, among the lowest flood hazard in the country; driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 7 years. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Mandatory flood insurance compliance in Edgefield County
FEMA's own figures for Edgefield County report more NFIP policies in the mapped flood zone than FEMA's own count of residential structures there, which produces a compliance rate over 100% — a data problem on FEMA's side, not evidence that everyone here is over-insured. See the data quality guide for how widespread this is. Looking beyond the mandated zone, 0.4% of all residential structures in Edgefield County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Edgefield County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Edgefield County ranks 2217 — 1 being the highest hazard nationally — and 1455 by population among all 3144 counties covered here, where 1 is the largest. Edgefield County, South Carolina covers 500.688 square miles and counts roughly 29,455 residents.
Your street may differ from Edgefield County's average
FEMA counts 8,610 residential structures in Edgefield County overall, 37 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Edgefield County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Edgefield County's compliance figure is one of the ones affected by FEMA's incomplete denominator data — the data quality guide explains what that means and how many counties it touches.