Hazard Plain national table b1f_tract_range, release 2026-10 (as of 2026-09-30)
B1-f range of tract-level NRI risk scores per county area and hazard (rated tracts only).
Files: b1f_tract_range.csv and b1f_tract_range.parquet (58,176 rows). The Parquet file carries this text as key-value metadata (keys hazard_plain.*).

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Columns: stcofips, prefix, n_tracts, n_rated, score_min, score_median, score_max, n_very_high, n_rel_high, n_rel_moderate, n_rel_low, n_very_low, n_no_rating, n_not_applicable, n_insufficient_data

Sources:
  FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-30, https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_Counties.zip, https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_CensusTracts.zip

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This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).