The Crown Jewel: Castro Marim Salt Is Now Officially DOP
On 9 March 2026, Portugal’s Diário da República published Aviso n.º 5717/2026/2 — a national decision favourable to the registration of Sal de Castro Marim as a Protected Designation of Origin. It had been a long time coming.
On the 9th of March 2026, something appeared in Portugal’s Diário da República that stopped us mid-sentence.
Aviso n.º 5717/2026/2. A formal government notice, dry as bureaucratic language always is, announcing a national decision favourable to the registration of “Sal de Castro Marim / Flor de Sal de Castro Marim” as a Protected Designation of Origin — DOP.
It had been a long time coming. And it changes everything.
It means that the name, the place, and the method are inseparable by law.
- 100% manual harvestNo machinery on the crystallisation beds.
- Never washed after harvestSalt is rinsed only in its own água mãe — mother brine — preserving its natural mineral profile.
- No additivesNo anti-caking agents, no bleaching, no chemical treatments.
- First packaging at originWithin the production area itself, before the salt leaves Castro Marim.
What DOP actually means
The DOP designation — Denominação de Origem Protegida in Portuguese, Protected Designation of Origin in English — is the European food system’s highest guarantee of authenticity. It is the same framework that protects Parmigiano-Reggiano, Champagne, and Porto.
For Castro Marim salt, it confirms what producers here have always known: this is not generic sea salt. The specific mineral composition of the Guadiana estuary, the particular microclimate of the RNSCMVRSA nature reserve, and the centuries-old manual harvesting methods combine to produce something that cannot be replicated anywhere else on earth. Now a European regulation says so.
For Sal Correia, none of this is new. It is simply who we are. But the formal protection matters — for our customers, for our export markets, and for every small producer in this region who refused to industrialise when it would have been easier to do so. Our next step is formal audit and certification by Kiwa Sativa, the designated control body, which will allow us to carry the DOP mark on our packaging. We are preparing for that process now.
A word about timing
The decision was signed by the Secretary of State for Agriculture on 23 December 2025 and published on 9 March 2026, following the application submitted by the Cooperativa Terras de Sal — the same cooperative that warned us about the worst tidal surge in years just weeks earlier.
It means that the 2026 Safra — our first full harvest season — will be produced under the legal framework the DOP creates. Whether the mark appears on our packaging this year depends on completing the Kiwa Sativa audit process. We are working towards that. Either way, the salt will be the same. The standard was always ours.
For our customers in Poland, Germany, and France
We know that in export markets, trust is built slowly. A beautiful label is not enough. A compelling story is not enough — though we hope ours is worth reading. What gives confidence to a chef in Warsaw or a deli buyer in Munich is provenance that cannot be faked and standards that are independently verified.
The DOP does exactly that.
A note of gratitude
This moment belongs to the entire Castro Marim salt-producing community — to Anabela and the team at Terras de Sal who led the application, to every marnoto who maintained their traditional methods through decades when industrial production made it financially difficult to do so, and to the families who held onto these clay pans when the easier path would have been to walk away.
We are proud to be part of that community. And we are ready for the season ahead.
Welcome to the DOP era.
— From Castro Marim to your table — protected in every grain.