1,807 Superfund sites, plotted where they are
Every address has
an environment.
This is its record.
Superfund sites, PFAS drinking water results, toxic releases and leaking fuel tanks, for every county in America. Reported from the federal releases rather than written up, and mirrored so they survive being taken down.
Check any US address, free
Why this exists
The professionals get an answer.
Everyone else gets a search box.
Before a commercial property changes hands, somebody orders an environmental records search. It costs $375 to $850, it is sold to consultants, and it is assembled almost entirely from public federal data that anybody may have for nothing.
About four million homes change hands each year and their buyers get none of it. Meanwhile the government has been removing its own public tools: EJScreen deleted in February 2025, the climate screening tool after it, four of the six PFAS drinking water limits proposed for rescission in May 2026.
Umwelt reads the same records, keeps its own copy of every file so they cannot simply vanish, and reports what they show. No verdicts, no scare copy, the source and the date on everything.
Data retrieved 2026-09-03 Â -Â Methodology and sources
What that looks like in practice
The largest exceedance of a live federal PFAS limit in the national testing round belongs to NASHVILLE, TOWN OF in NC, at 490 ng/L of PFOS, against a federal limit of 4.
- Every figure is a dataset row
- Nothing modelled, nothing generated, nothing written from memory.
- Exceedances only against real limits
- The four PFAS standards EPA proposed rescinding are reported as detections, with no threshold invented for them.
- Records, never verdicts
- This site will not tell you a property is safe. Records cannot support that, and pretending otherwise is how people get hurt.
- The data is yours
- Every compiled table is downloadable as CSV, free.
The record
Four questions, answered per county
1,840
Superfund
Every site on the National Priorities List with its status, hazard score and cleanup history, plus 14,980 more in the wider federal cleanup inventory.
Open
10,313
Drinking water
A page for every public water system EPA tested for PFAS, with its full per-compound results and the population it serves.
Open
21,482
Toxic releases
Which industrial facilities reported releasing what, in 2024, and how much of it went to air, water or land.
Open
3,143
Fuel tanks and radon
Underground tank facilities and open leak cleanups by county, alongside the EPA radon zone, on every county page.
Open
If you need it for one address
The $375 search, for $39
Type an address and get every recorded cleanup site, tank release, reporting polluter and water result around it, with the distance to each, in about a minute. The address is checked before you pay, so one we cannot resolve is never charged.
Everything on the record around one address, with distances and sources.
An email the moment a site, a water result or a tank cleanup near it changes.
Unlimited reports for agents, inspectors, lenders and consultants.
Reading the record
What the numbers actually mean
How to read a PFAS test result
The units are confusing on purpose, the limits moved in 2026, and four of the six federal standards are being withdrawn. Here is what a number on a water report actually means.
7 min
What a Superfund site near you actually means
Listing, proposed, deleted, construction complete. The federal vocabulary sounds alarming or reassuring in ways that do not always match the ground.
8 min
Buying a house near a contaminated site
What to read, what to test, what to ask, and where the line is between diligence you can do yourself and work that needs a professional.
7 min