Everything here is computed from public data sources - NASA POWER, OpenFEMA, USGS, the U.S. Drought Monitor, FHWA, and the Census - using the same formulas that power our live calculators.
Which states put the most environmental stress on home systems - climate extremes, declared disasters, flood zones, drought, and earthquakes, weighted into one 0-100 score per state.
2026 DatasetWhere extended auto coverage earns its keep - freeze and heat days, pavement condition, per-capita mileage, storm declarations, flood exposure, and road-salt corrosion.
2025 ReportInstallation and upkeep costs by pool type, what pool add-ons cover, and the complaint themes that show up in reviews.
All datasets are free to reference with a link to the source page. The underlying inputs are public; the composite scores, weights, and rankings are warrantyindex.com editorial work. If you need the raw JSON for a story or a study, the state-level files are linked at the bottom of each research page.