Tradition Meets Science: What Lives Inside Our Salt Pans
We’ve always known our salt pans are alive. Project SAL+ — a research initiative funded by Fundación “la Caixa” — is now producing the peer-reviewed evidence to prove it.
We’ve always known our salt pans are alive.
Not metaphorically — literally. The talhos of Venta Moinhos are home to halophyte microorganisms, extremophile bacteria, and a biological complexity that most people never associate with the word “salt.” For us, this has always been part of what makes Castro Marim salt different. It just took scientists to explain why.
When you open a bag of Sal Correia, you’re holding the output of a living ecosystem, a four-generation family, a protected nature reserve, and now — a peer-reviewed scientific process.
- Mapping purityPhysical-chemical characterisation of traditional production systems across Castro Marim, directly supporting the scientific basis for the DOP “Sal de Castro Marim” designation.
- Food safety monitoringSystematic tracking of salt characteristics and contaminant screening, to the standard expected of premium food exports.
- Biotechnological researchStudying the unique biology of the salt pan ecosystem, including the halophyte microorganisms that thrive only in environments like ours.
Project SAL+
The artisanal salt production of our region is now part of SAL+, a scientific research initiative financed by Fundación “la Caixa” through the Promove programme. It brings together heritage salt producers and modern food science to do something our industry has needed for a long time: produce hard evidence for what traditional producers have always known intuitively.
For us, this is not an abstract academic exercise. When the QR code on your bag of Sal Correia links to a lab result, the rigour behind that number owes something to exactly this kind of institutional science.
The part nobody talks about
There’s a dimension to artisanal salt farming that rarely appears on a product label, but it should.
Our salt pans don’t just produce salt. They maintain the hydric network of the Castro Marim marsh. Every day that Custódio and our team work the talhos — clearing channels, managing water flow, repairing cômoros — they are also sustaining the habitat that supports the protected birdlife of the RNSCMVRSA. The Pernilongo nests here. The flamingos feed here. None of that happens without the active stewardship of the salt producers who have worked this land for generations.
And then there’s carbon. Traditional salt pans are, per unit area, among the most efficient carbon-sequestering ecosystems in Europe — more effective than many forests. This is not a marketing claim. It is an emerging area of climate science, and one that our region’s producers are now part of documenting.
What this means for the 2026 Vintage
We don’t wash our salt after harvesting. We don’t bleach it. We don’t accelerate the crystallisation with heat or additives. The Atlantic, the Guadiana, and the Algarve sun do the work — the same way they have since the Romans first understood that this particular estuary produced something worth paying soldiers with.
What SAL+ gives us is the modern vocabulary to explain an ancient fact.
When you open a bag of Sal Correia, you’re holding the output of a living ecosystem, a four-generation family, a protected nature reserve, and now — a peer-reviewed scientific process.
That’s what Radical Transparency actually means. Not just showing you the good parts. Showing you everything.
Taste the tradition. Trust the science.
— From Castro Marim to your table — science in every grain.