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Data sources and limitations

Toxin Scout is a public-record screening tool

Reports summarize government and public environmental datasets for a searched address or city. They do not prove whether a person has been exposed to a substance, whether environmental conditions are absent at a property, or whether a water utility serves a specific address. Use the linked official records to verify important findings.

Address and city reports differ

Address reports use the best available geocoded point and source-specific radii or administrative matches. City reports use city-level context, candidate public water systems, source polygons, administrative areas, and bounded facility browsing where available. A city report is not an address-level assessment.

Water provider matching is approximate

Public water systems often serve areas that do not match city boundaries, ZIP codes, or mailing addresses. City reports show candidate systems from SDWIS city/system-name and nearby ZCTA metadata. Confirm your actual provider with a bill, local utility, or Consumer Confidence Report.

Some data is modeled or delayed

AirToxScreen, EJScreen, flood, radon, health, and similar area datasets are context sources. Many datasets are updated quarterly, annually, or less often. Recent events may not appear until the source agency publishes them.

Unavailable sources are shown separately

A source can be unavailable because the agency API is down or city geography is not precise enough for that source. A no-results source means the source was checked and returned no matching records. Reports show those states separately.

Included public sources

Superfund Sites

EPA · EPA Superfund (SEMS)

Official source

Federal cleanup-site records. These records can identify listed or proposed sites, but they do not measure exposure at a specific home.

Toxic Release Inventory (TRI)

EPA · EPA Toxics Release Inventory (TRI)

Official source

Annual facility self-reported release records. TRI reporting means a facility meets EPA reporting thresholds; it is not itself a violation record.

Brownfield Sites

EPA · EPA Brownfields (ACRES)

Official source

Assessment and cleanup program records. Status fields can be sparse, so unresolved status is separated from confirmed current activity.

Air Toxics (AirToxScreen)

EPA · EPA AirToxScreen

Official source

EPA modeled air-toxics screening estimates. These are statistical model outputs, not monitors at a specific address.

Drinking Water Quality

EPA · EPA SDWIS Federal Reports

Official source

Public water-system compliance records. City reports show candidate systems, not a verified provider for a specific address.

EPA Enforcement (ECHO)

EPA · EPA ECHO

Official source

Facility compliance and enforcement records. These are official program records, but facility coordinates and program flags can have source-data gaps.

Hazardous Waste (RCRA)

EPA · EPA RCRA (via ECHO)

Official source

Hazardous-waste handler and compliance records. Active handler status is separated from formal enforcement or significant noncompliance.

Environmental Justice (EJScreen)

EPA · EPA EJScreen

Official source

EPA screening indexes and demographic/environmental context. These values are context only and are not facility violations.

Water Quality (USGS)

USGS · USGS Water Quality Portal

Official source

Surface-water monitoring stations and samples. These records are environmental samples, not tap-water tests.

Risk Management Plans (RMP)

EPA · EPA RMP (via ECHO)

Official source

Risk-management-plan facility records. RMP coverage means a facility reports certain regulated substances or processes; the record does not by itself describe a current release.

Nuclear Facilities (NRC)

NRC · NRC Facility Finder

Official source

Nuclear facility location records. These records identify licensed or regulated facilities and do not measure radiation exposure at a searched location.

Community Health (CDC EPHT)

County Health Rankings · County Health Rankings

Official source

County or area-level health indicators. These values are population context and cannot identify the cause of a specific condition or exposure.

Pipeline Incidents (PHMSA)

DOT/PHMSA · PHMSA Pipeline Incident Reports

Official source

Pipeline incident records. Reported incidents are historical event records and may not describe current operating conditions near a searched location.

EPA Radon Zone

EPA · EPA Map of Radon Zones

Official source

EPA radon-zone estimates. Zones are broad screening categories and do not replace a building-specific radon test.

Underground Storage Tanks (UST/LUST)

EPA · EPA UST Finder

Official source

Underground storage tank and leaking tank records. State coverage and status terminology vary, so open and closed records are separated where the source provides status.

FEMA Flood Zone

FEMA · FEMA Flood Map Service Center

Official source

Flood-zone map records. FEMA map status is property and map-panel specific; city reports can only provide area context unless an exact address is checked.

Air Quality Nonattainment Areas

EPA · EPA Green Book — Nonattainment Areas

Official source

Air-quality nonattainment area records. These are regulatory area designations and do not measure air quality at a specific address.

Water Body Impairment (ATTAINS)

EPA · EPA ATTAINS

Official source

Water-body impairment records. These records apply to named water bodies and assessment units; they are not drinking-water compliance records.

Formerly Used Defense Sites (FUDS)

USACE · USACE FUDS Program

Official source

Formerly Used Defense Site records. These identify program sites and cleanup context where available, but site boundaries and current status can require agency verification.

Military PFAS Sites (DoD)

DoD · DoD PFAS Sites

Official source

Military PFAS site records. These identify DoD-reported PFAS investigation or response locations and should be verified against the linked official program records.

State Remediation & Cleanup Sites

State DEP/DEQ · State Environmental Agency

Official source

State remediation and cleanup records. Data availability, update cadence, and status fields differ by state source.

Air Quality Monitoring (AQS/AirNow)

EPA · EPA Air Quality System (AQS)

Official source

Air-monitoring station records. Measurements come from monitoring stations and may not represent conditions at every address in the searched city.

Hydraulic Fracturing Wells

FracFocus / GWPC-IOGCC · FracFocus Chemical Disclosure Registry

Official source

Hydraulic-fracturing disclosure records. Disclosure records identify reported well activity and chemicals; they do not establish current exposure.

How to verify records

Use the official links in each report section to confirm facility IDs, public water-system IDs, status dates, and agency labels. For drinking water, confirm the actual service provider before using a city-level candidate system as the basis for decisions. For urgent environmental, health, legal, or property questions, contact the appropriate public agency or a qualified professional.

Legal notice

Toxin Scout is operated by Retrogram Music, LLC. Toxin Scout is not affiliated with, sponsored by, or endorsed by any government agency. This is a beta product, and public-source data, matching, dates, and summaries may be incomplete, delayed, approximate, or inaccurate. Double-check each important data point against the linked official source records before making decisions based on these insights. They are governed by the Terms and Privacy Notice.