Zone X (flood zone)
Zone X is a FEMA flood zone designation for areas outside the 1% annual chance floodplain. Shaded Zone X marks areas of moderate hazard, including the 0.2% annual chance or 500-year floodplain, while unshaded Zone X marks minimal flood hazard. Zone X land is generally outside federal flood insurance mandates, but local stormwater and drainage conditions still deserve review for critical facilities.
The full guide · Environmental & physical riskCan You Build a Data Center in a Floodplain?How FEMA flood zones, floodways and base flood elevations affect data center sites, what it takes to build near a floodplain, and how to screen flood risk.Where Zone X comes up
- Land & site fundamentalsGross vs. Buildable Acreage: How Much of a Site You Can Use
- Land & site fundamentalsData Center Site Selection Criteria: The Complete Checklist
- Feasibility, diligence & dealsWhat Does a Data Center Feasibility Study Cover?
- Environmental & physical riskHurricane and Storm Surge Risk for Data Center Sites: SLOSH Maps, Coastal Flood Zones and Grid Outages
- Feasibility, diligence & dealsWhat to Check on a Data Center Site Visit: A Field Checklist