A quote taken from the Origen website:

España es el segundo productor europeo de alimentos ecológicos, pero más del 80% se exporta.

Spain is the second biggest producer of ecological food in Europe, but more than 80% of it is being exported.

I decided to put a list together of ecological supermarkets in Madrid to make the search for ecological food easier for those interested.

Botica Ecologica
Pje Remonta, 4
28039 Madrid
915 71 20 08
Metro Valdecaderas

Origen
c/ Doctor Gómez Ulla, 16
28028 – Madrid
Pedidos a domicilio 91 713 17 92
Metro Manuel Becerra

Ecocentro
Ecocentro is a huge space for ecological products and a restaurant with an ecological buffet in three stores at one address.
Calle de Esquilache, 2 – 12
28003 – Madrid
Metro Cuatro Caminos

NaturaSi
Calle de Alcalá, 104
28009 – Madrid
Metro Manuel Becerra

Nature & Clark
Hortaleza 106
28004 – Madrid
Metro Alonso Martínez

El Rincón de Andrea
Hortaleza 94
28004 – Madrid
Metro Alonso Martínez

Check this out on my google map: Madrid Ecological Supermarket Map