Methodology & how this site is made
How this site is made
Countyguard's county pages are compiled from public federal datasets — FEMA disaster declarations, FEMA NFIP flood-insurance policies and claims, NOAA storm events, and the EPA Safe Drinking Water Information System. Every number on a county page traces to a named source field and a documented filter: nothing is estimated, and nothing is editorialized.
Before any build publishes, a validator built on a separate code path from the page generator — our own software, not a third-party audit — re-reads every generated page cold and re-derives each figure straight from the source data. One mismatch blocks the entire build. When a county's records are too thin to be useful, we publish no page for it and route residents to the statewide guide. Corrections are welcome and logged — see any record's change log.
Build manifest & provenance
The exact public sources this build was compiled from — the download/API page, the snapshot vintage we ingested, and the row count — plus the cube's transform versions. Public datasets are live and may run ahead of these snapshots.
| Source dataset | Snapshot vintage | Rows ingested |
|---|---|---|
| FEMA — Disaster Declarations Summaries v2 | 2026-07-20 | 8,683 |
| FEMA — NFIP Redacted Claims v2 | 2026-07-20 | 412,420 |
| FEMA — NFIP Redacted Policies v2 | 2026-07-20 | 7,931,718 |
| NOAA — Storm Events Database | 2026-07-20 | 97,517 |
| EPA — Safe Drinking Water Information System | 2026Q3 | 6,696 |
| US Census — American Community Survey (5-year) | 2026-07-20 | 395 |
Cube transform versions: hazard_map 2026-07-19.1, metrics 2026-07-19.1, resolver 2026-07-19.1. Every value above is read from the build's stored provenance; none is hand-entered.
Data-method records
One record per statistic that appears on a county page. Each defines the exact source, fields, filters, window, rounding, suppression rule, the internal build query, and a public raw-source reproduction recipe.
- Federal disaster declarations (since 2015) — FEMA — OpenFEMA Disaster Declarations Summaries v2
- Recent water-related disaster declarations — FEMA — OpenFEMA Disaster Declarations Summaries v2
- Flash-flood event records & seasonality — NOAA — Storm Events Database
- The whole NFIP flood-claim record — FEMA — OpenFEMA NFIP Redacted Claims v2
- Per-1,000-homes rates and Texas county rank — FEMA — OpenFEMA NFIP v2 + US Census — American Community Survey (5-year)
- NFIP flood policies in force — FEMA — OpenFEMA NFIP Redacted Policies v2
- NFIP claims with recorded building payments — FEMA — OpenFEMA NFIP Redacted Claims v2
- Typical (median) recorded building payment — FEMA — OpenFEMA NFIP Redacted Claims v2
- Middle half of paid building claims (25th–75th percentile) — FEMA — OpenFEMA NFIP Redacted Claims v2
- Water utilities, population served & registered phone — EPA — Safe Drinking Water Information System (SDWIS)
Source data refreshed through: declarations through 2026-07 · nfip_claims through 2026-05 · nfip_policies_snapshot through 2026-07-20 · noaa through 2026-03. Current cube build 2026-07-21b (generated 2026-07-21).
Who publishes this
Published by Eldhurst LLC, which is accountable for what this site publishes. Countyguard is not a licensed adjuster, contractor, engineer, or attorney. Corrections and questions: support@countyguard.com.