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Homebuyer Due Diligence • 6 min read • Last Updated October 28, 2026

How to Check If a House or Property Is Near a Superfund or Hazardous Waste Site

Step-by-step guide to screening any U.S. street address for nearby EPA Superfund (NPL) sites, RCRA hazardous waste generators, and active environmental violations within a 1-mile radius before you close.

Why Standard Home Inspections Miss Environmental Contamination

A typical residential home inspection evaluates the roof, HVAC, plumbing, foundation, and electrical panels—but stops at the property line. It does not check whether a parcel 600 feet away is an active Resource Conservation and Recovery Act (RCRA) hazardous waste handler, a former dry-cleaning plant with chlorinated solvent plumes, or a federal enforcement target with multi-quarter Clean Water Act violations.

What Buffer Distance Should Homebuyers Check?

Commercial lenders and environmental engineers following ASTM E1527 standards typically evaluate concentric search radii around a subject property: 0.25 miles (1,320 feet) for leaking underground storage tanks (UST/LUST) and dry-cleaning vapor intrusion risks; 0.50 miles for RCRA corrective action and brownfield sites; and 1.0 mile for major Superfund National Priorities List (NPL) facilities and Toxics Release Inventory (TRI) air emitters.

How to Read an Environmental Radius Report

When reviewing a 1-mile radius screening report, pay closest attention to four indicators: (1) Significant Non-Compliance (SNC) flags, which indicate unresolved high-priority violations; (2) Quarters in Non-Compliance over the past 12 quarters; (3) Formal enforcement actions and federal monetary penalties; and (4) Topographic or floodplain proximity (FEMA Zone A/AE) that can carry surface runoff toward your parcel.

Frequently Asked Questions

How close to a Superfund or hazardous waste site is considered risky for a home?
Environmental professionals screen within 1.0 mile for Superfund and major chemical release sites, and within 0.25 miles (about 3 city blocks) for vapor intrusion sources like dry cleaners and underground fuel tanks.
Do sellers have to disclose nearby EPA violations?
In most states, seller disclosure forms only cover known hazards on the parcel itself. Off-site industrial facilities, nearby groundwater plumes, or EPA violations two blocks away are rarely disclosed unless the buyer runs an independent radius screening.