Hydrodatum
A datum is the fixed reference every other measurement is stated against — the brass disc set in bedrock that a river's water level is measured from. We build the reference layer for public environmental data, and the products that make it useful.
Environmental monitoring data is public, enormous, and almost unusable. It sits in hundreds of separate government databases, in incompatible formats, in a dozen languages, with no common identifiers and no shared notion of how current a reading is.
We aggregate it, reconcile it, and keep it honest about its own gaps — then build products on top for people who need to act on it: anglers deciding where to go, researchers deciding whether a manuscript will survive review.
An open global water quality database — 215,000+ monitoring stations and 61 million measurements from 30+ countries, with records reaching back to 1906. Free API, Apache 2.0, open to anyone.
Live WhereIfishwhereifish.com · zainadiao.comA pre-trip decision layer for anglers: what the current covered sources do — and do not — say about a water body before you plan a trip. Traceable measurements, explicit closure coverage, official links, and honest partial answers. Operating in the United States and China.
Public beta First Refereefirstreferee.comPre-submission critique for researchers. A scientist publishing in your exact subfield reads your manuscript and tells you where a reviewer will attack it. Currently environmental health only.
OpeningEvery product is built on public data, and every product says plainly what its data cannot support. A readiness score is not a safety verdict. A missing closure record is not permission to fish. A critique is not a prediction of acceptance.
Being useful about uncertainty is the product. Hiding it would be easier and would make all three worthless.