Turner County, SD flood risk explained
Flood hazard in Turner County sits at the 26.7th 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 1.6 times a year. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Turner County's flood-insurance compliance gap
FEMA hasn't published a residential structure count for Turner County's mapped flood zone, so a reliable mandatory-compliance percentage can't be computed here — see the data quality guide for why this gap exists for roughly a quarter of US counties. Looking beyond the mandated zone, 0.4% of all residential structures in Turner County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Turner County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Turner County ranks 2355 — 1 being the highest hazard nationally — and 2488 by population among all 3144 counties covered here, where 1 is the largest. Turner County, South Dakota covers 617.064 square miles and counts roughly 9,087 residents.
Checking a specific address in Turner County
28 of Turner County's 7,245 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Turner County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Turner 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.