How the score works.
A score from 0 to 100 summarizing the regulated pollution sources within five miles of an address. Built on public federal data, no lobbying, no hidden variables.
What feeds the score
Every facility and violation record comes from public US government datasets. We do not collect, estimate, or model pollution ourselves — we index what regulators already require companies to report.
Facility Registry Service
Canonical facility identity and location across every federal environmental program.
Toxics Release Inventory
Annual self-reported releases of 770+ toxic chemicals from industrial facilities.
Risk-Screening Environmental Indicators
EPA's own human-health hazard score combining toxicity, dose, and population exposure.
Superfund Enterprise Management System
Active and historical Superfund sites, including NPL-listed hazardous waste cleanup sites.
Safe Drinking Water Information System
Public water system boundaries and MCL (Maximum Contaminant Level) violations.
Enforcement and Compliance History Online
Clean Air Act, Clean Water Act, and RCRA violations and enforcement actions.
Leaking Underground Storage Tanks
State-reported petroleum leaks from underground tanks. Coverage varies by state.
The composite score
The composite is a 0-to-100 number normalized against a national grid of baseline addresses, so a 50 means roughly the median US address for regulated exposure.
Scores are binned into five plain-English bands:
Few or no regulated sources nearby. Uncommon; typical of rural low-industry areas.
A handful of sources, modest releases. Typical suburban reading.
Meaningful industrial presence or a flagged contamination site in range.
Dense industrial clustering, significant TRI releases, or active Superfund sites.
Sustained heavy releases or multiple NPL sites — warrants a professional Phase I ESA.
The four subscores
Alongside the composite, every result breaks down into four themed subscores so you can see what's driving the number.
Air
Toxic air releases within 5 miles weighted by RSEI hazard and distance decay.
Industrial
Count and intensity of active regulated industrial facilities nearby.
Water
Drinking water violations and surface-water discharge events affecting your address.
Legacy
Superfund sites and leaking underground storage tanks within range.
Distance and hazard weighting
A refinery a quarter mile away matters more than one eight miles away. Contributions from each facility are weighted by:
- Inverse-square distance decay to your address
- RSEI hazard score for the reported chemicals
- Reporting recency (fresher data counts more)
- Whether the facility has active open violations
What this is not
A screening tool. Not a Phase I Environmental Site Assessment. Not legal, medical, or real estate advice. A 30-second read that tells you whether to ask harder questions, not the final word.
Indoor air quality, radon, asbestos, lead paint, mold, and property-specific soil testing are outside the scope of federal open data and outside the scope of this score.
Demo mode notice
DEMO MODE
Scores shown today are deterministic synthetic results — not computed from live EPA data.
The ingestion pipeline for the datasets above is in active development. When real data goes live, this banner comes down and the methodology on this page becomes the literal algorithm behind every score.
LAST UPDATED 2026-04-20