An update is available for the estimated population living within a 100-year flood zone. This indicator reports the estimated number of people living within a 100-year flood hazard area based on the 2020 LandScan estimated population counts and EPA estimated flood hazard areas. The EPA EnviroAtlas dataset provides an estimate of the 100-year floodplain for the conterminous United States at 30-meter resolution to fill the gaps in the FIRM. The model hit rate for the CONUS was 0.79 compared to the FIRM, indicating that the model captured 79% of the 100-year floodplain identified by FEMA.
