Real Data.
Real Sources.
HomeDoc aggregates 22+ government and institutional databases to give you provenance-stamped risk scores, water quality reports, and property intelligence — all cited, cached, and refreshed on schedule. Zero fabricated numbers.
Our data promise
Every risk score in HomeDoc carries a provenance record — the exact source it came from, the confidence level, and when it was last fetched. When data is unavailable we say so plainly, rather than inventing a plausible-looking number. Each government dataset is cached county-by-county and refreshed on its own cadence, so you never see stale scores presented as current.
The complete source catalogue
Every database HomeDoc queries, what it powers, how often it refreshes, and a direct link to the original source.
Wildfire
5 sourcesCounty-level composite hazard ratings for 18 natural hazards. Combines annualised expected losses, social vulnerability, and community resilience into a 0–100 score per hazard.
Powers
Type
Federal
Cost
Free
Refresh
Annual NRI release
30-metre raster dataset of wildfire hazard potential classes (1–7) derived from landscape characteristics, fuel continuity, historical ignitions, and weather patterns.
Powers
Type
Federal
Cost
Free
Refresh
Biennial
Perimeter-level records of every significant wildfire in the US over the past 20+ years, covering name, year, and acreage. Used to compute fire history near your property.
Powers
Type
Federal
Cost
Free
Refresh
Post-season updates
California's official fire hazard severity zone map under the Public Resources Code. Required disclosure for home sales. Defines defensible space requirements.
Powers
Type
State
Cost
Free
Refresh
Per OSFM updates
Flood
2 sourcesOfficial FEMA digital flood insurance rate maps (FIRMs) served as a live ArcGIS MapServer. A point-in-time query at your property's lat/lng returns the precise flood zone and whether mandatory flood insurance applies.
Powers
Type
Federal
Cost
Free
Refresh
Per FIRM panel revision
NRI's IFLD_* (Inland Flooding) and CFLD_* (Coastal Flooding) fields, providing county-level flood risk scores independent of individual FIRM panels.
Powers
Type
Federal
Cost
Free
Refresh
Annual
Earthquake
3 sourcesProbabilistic seismic hazard analysis providing ground motion values at 2% probability of exceedance in 50 years (approximately the 2,500-year return period) — the standard design criterion for buildings.
Powers
Type
Federal
Cost
Free
Refresh
Per NSHM revision
ComCat earthquake catalog queried for M4.0+ events within 50 miles over the past 100 years. Puts recent seismicity in historical context for your specific location.
Powers
Type
Federal
Cost
Free
Refresh
Continuously updated
National database of faults that have been active during the Quaternary period (roughly the past 2.6 million years). Identifies the closest named fault, its distance from your property, and its average slip rate.
Powers
Type
Federal
Cost
Free
Refresh
Per USGS updates
Severe Weather
1 sourceNRI HWAV_* (Hurricane Wind), TRND_* (Tornado), SWND_* (Strong Wind), and HAIL_* fields — each a 0–100 score derived from historical storm tracks, atmospheric modelling, and population exposure.
Powers
Type
Federal
Cost
Free
Refresh
Annual
Crime
1 sourceFBI Uniform Crime Reporting (UCR) and NIBRS programme data accessed via the Crime Data Explorer API. HomeDoc resolves county-level rates by aggregating reporting agencies within a county using population-weighted averaging.
Powers
Type
Federal
Cost
Free (api.data.gov key)
Refresh
Annual UCR release
Air Quality & Environment
2 sourcesReal-time AQI observations from the nationwide network of EPA monitoring stations. HomeDoc queries by county centroid or ZIP code and returns the current dominant pollutant and health category.
Powers
Type
Federal
Cost
Free (API key)
Refresh
Hourly
EPA's Map of Radon Zones, which classifies every US county as Zone 1 (>4 pCi/L predicted average, high), Zone 2 (2–4 pCi/L), or Zone 3 (<2 pCi/L). Informs whether radon testing is strongly recommended.
Powers
Type
Federal
Cost
Free
Refresh
Static EPA dataset
Water Quality
4 sourcesFederal database of all public water systems — violations, enforcement actions, system characteristics. Identifies active health-based violations such as coliform or nitrate exceedances for your water utility.
Powers
Type
Federal
Cost
Free
Refresh
Quarterly EPA updates
Nation's primary repository for water data — streamflow, groundwater, water quality parameters from thousands of monitoring sites. Cross-references your county for nearby quality measurements.
Powers
Type
Federal
Cost
Free
Refresh
Continuous USGS updates
Behavioral Risk Factor Surveillance System data used to correlate environmental conditions with reported health outcomes at the county level.
Powers
Type
Federal
Cost
Free
Refresh
Annual
EWG's analysis of utility testing data reveals contaminants present above health guidelines (even when below legal limits). Provides consumer-accessible context including PFAS, lead, and disinfection by-products.
Powers
Type
Non-profit
Cost
Free
Refresh
Annual
Property Intelligence
4 sourcesAggregated public records data for US residential properties. Used during onboarding to auto-fill your home profile from deed records, MLS history, and assessor data.
Powers
Type
Commercial
Cost
$0.01/call
Refresh
30-day cache per property
Address validation, lat/lng resolution, and street view imagery. Used during onboarding to confirm your address and show a preview of your home.
Powers
Type
Commercial
Cost
Pay-per-use
Refresh
Per-request (proxied server-side)
AI-derived rooftop analysis using aerial imagery. Calculates usable roof area, panel orientation, and estimated annual energy production for your specific property.
Powers
Type
Commercial
Cost
Pay-per-use
Refresh
Per-request
Comprehensive database of US electric utility rate structures. Used to identify your utility provider from ZIP code and retrieve the applicable rate tiers for energy calculations.
Powers
Type
Federal
Cost
Free
Refresh
Quarterly NREL updates
How the data pipeline works
Every risk score follows the same hardened path from government source to your dashboard.
Address resolved
Your address geocodes to a county FIPS code and lat/lng pair via Census and Google Maps.
Cache checked first
A 90–365 day county cache is queried. Cache hits are free and return in <50 ms.
Live fetch on miss
Each API is called with a timeout guard, retry logic, and non-200 handling. No silent failures.
Provenance stamped
Every result records the source name, confidence level, and fetch timestamp — visible in the UI.
What every HomeDoc report covers
Eight risk dimensions from federal and institutional sources — all in one place.
See your home's real risk profile
Enter your address and get a full, sourced risk report in under 30 seconds.