Which flood zone is associated with a 1% annual chance of flooding?

• A. Zone B
• B. Zone A
• C. Zone V
• D. Zone X

Answer: (B)

The main idea is that flood zones indicate how likely flooding is in a given area, with the 1% annual chance describing the 100-year flood. Zone A is the standard label used on NFIP flood maps for areas with a 1% chance of flooding each year, and base flood elevations are not provided there. That’s why it’s the best fit for a question asking about the 1% annual chance. Zone V also carries a 1% chance, but it’s a coastal high-hazard area with additional wave action hazards, which makes it a different kind of 1% scenario. Zone X refers to areas outside the 1% or 0.2% flood risks (lower hazard areas), so it doesn’t match the 1% designation. Zone B is not the general 1% floodplain designation in typical mappings.