Dispatch·8 May 2026·5 min read

The Final Exam: What Brussels Wants to Know About Our Salt

The Portuguese government has approved our DOP application. Now Brussels sends its technical feedback — and we have two months to answer. We’re sharing the questions, the answers, and what they reveal about Radical Transparency.

A Purple Heron in flight over the Castro Marim salt pans, wings catching the late-afternoon sun against a deep blue sky.
◦ 8 May 2026

We promised you Radical Transparency. So here it is, unfiltered.

Last month we wrote about the Portuguese Government’s favourable decision to register “Sal de Castro Marim / Flor de Sal de Castro Marim” as a Protected Designation of Origin. That was a genuine milestone — a national decision that validates decades of work by the Castro Marim salt-producing community.

But a national decision is not the finish line. The application now sits with the European Commission in Brussels, under review as PDO-PT-02607. And they just sent back their questions. We have two months to answer them.

This is the part we want to share openly, because it tells you something important about what a DOP designation actually requires. The Commission’s feedback is not a rejection.

It is a demand for precision — the kind of precision that separates a protected designation from a label.
  • Less history, more science
    Our application referenced the Bronze Age, the Romans, the Moors. The Commission’s position is clear: a DOP is grounded in demonstrable natural and human factors, not cultural narrative. The history can inform the story; it cannot substitute for data.
  • The mineral chemistry, in numbers
    They want the specific physical-chemical profile of our salt — elevated magnesium and potassium levels, lower sodium chloride concentration than industrial sea salt — documented and linked directly to our water management system. The data exists; it now needs to be formalised in the specification.
  • The technique, described exactly
    How does a marnoto rake Sal de Castro Marim without disturbing the clay bottom? What tools? What motion? At what point in the crystallisation cycle? The Commission wants this written with the precision of a technical standard, not described in general terms.
  • Sensory description
    Colour, crystal shape, texture, taste — for both the Flor de Sal and the traditional salt. A qualitative profile, concise and precise.
  • Labelling compliance
    The mandatory designation “Sal de Castro Marim — DOP” must appear correctly on all packaging references within the specification document. There is also a broken link in the submitted files that needs correcting.

Why we are not worried

Everything the Commission is asking for, we can answer.

The mineral data exists. The harvesting technique is what Custódio has done his entire life — it simply needs to be written down with scientific rigour. The sensory profile is something every marnoto knows by touch and taste. None of this is invention; it is documentation.

What this process is doing, in practice, is forcing the kind of precision that will make the final DOP specification genuinely useful — for us, for auditors, for buyers, and for the consumers who scan a QR code and want to understand exactly what they are holding.

The EU is not asking us to be something we are not. They are asking us to prove, in writing, what we already know to be true.

That is, word for word, what Radical Transparency means.

We’ll keep you posted.

— From Castro Marim to your table — proven in every grain.

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