Pettis County, MO flood risk explained
Flood hazard in Pettis County sits at the 60.3th national percentile, below the national norm for flood hazard; driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 1 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 Pettis County
FEMA hasn't published a residential structure count for Pettis 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, 0.2% of all residential structures in Pettis County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Pettis County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Pettis County ranks 1305 — 1 being the highest hazard nationally — and 1120 by population among all 3144 counties covered here, where 1 is the largest. Pettis County, Missouri covers 682.237 square miles and counts roughly 43,791 residents.
What to do next if you own or are buying in Pettis County
Across all of Pettis County's 21,155 residential structures, 37 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Pettis County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Pettis 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.