Repaired: 2003 by Salvador Soto, student in the ENCRyM (Escuela Nacional de Conservación, Restauración y Museografía); the repair was careful and adequate given the reduced budget. The project was financed by the municipal authorities of Zapotitlán.

The organ of San Pedro Zapotitlan Lagunas and the similar instruments in Ahuehuetitlán, Ihualtepec, and Tamazola are located in relatively close communities in the flat northwestern region of the Mixteca Baja near the state border with Puebla.  They were built over the course of nearly 40 years by the Castro family organ building company in Puebla, which dominated organ building in the area throughout the 19th century. The Zapotitlan organ is the only functioning organ in the group but unfortunately, more than 20 years after its repair, it is played rarely, if at all. It is a more modest version of the Tamazola organ which has horizontal trumpets, for example, whereas the Zapotitlan organ does not. Although undated, the Zapotitlan organ was probably built around the same time as the dated Tamazola organ (1885/1888). Castro organs are well-made and elegant in appearance. They are immediately distinguishable from Oaxaca-built organs because of their straight sides (without hips) and decorative relief panels on the lower case, symmetrical perforations in the sides and back of the upper case, a curved profile over the interior flat towers, an extended keyboard, and metal wind conduits. The names of the stops and the cornet register are typical of Puebla, but not Oaxaca, organ-building.