Data field · Event · Geographic area · Parcel

Environmental observation year

The year associated with environmental sampling, testing, contamination evidence, or a regulator observation.

Who carries it ↓

1Data sources

1Providers

1Free to access

Sources that carry it

1 source

Social Science Environmental Health R…

Known PFAS Contamination Sites

Public nationwide point layer republishing SSEHRI's PFAS Contamination Site Tracker, with site identity, state, industry, sampled matrix, year, PFAS concentration measures, notes, and links to supporting testing, source, and government-response material.

Free APIFull file National US 7 fields

Questions it helps answer

Area drinking-water PFAS measurements

Need Environmental observation year at scale?

We compare every source that carries it on your own records — fill rate, freshness, definition — and bring the winner into production for you.