Adams County, ID flood risk explained
Flood hazard in Adams County sits at the 35.9th 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 4 years. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Mandatory flood insurance compliance in Adams County
FEMA hasn't published a residential structure count for Adams 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, 0.3% of all residential structures in Adams County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Adams County ranks
Among the 3144 US counties FEMA scores for flood hazard, Adams County ranks 2079 — 1 being the highest hazard nationally — and 2820 by population among all 3144 counties covered here, where 1 is the largest. Adams County, Idaho covers 1,362.804 square miles and counts roughly 4,998 residents.
Checking a specific address in Adams County
Across all of Adams County's 3,280 residential structures, 10 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Adams County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Adams 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.