Solsona had Spain's first wastewater treatment plant in 1929

Historian Marcel·lí Corominas reveals the finding within the Aiguafina exhibition, which traces 2,700 years of water management in Solsonès.

Historical blueprints of a wastewater treatment plant from the early 20th century.
IA

Historical blueprints of a wastewater treatment plant from the early 20th century.

Historian Marcel·lí Corominas revealed that Solsona operated the first wastewater treatment plant in Spain in 1929, a discovery linked to the ongoing Aiguafina exhibition.

The exhibition Aiguafina, Els camins de l’Aigua, promoted by the Centre d'Estudis Lacetans and other entities, offers a 2,700-year journey through the history of water management in Solsonès, from pre-Iberian settlements to the creation of the Mancomunitat d’Abastament d’Aigua del Solsonès. Corominas, who holds a degree in Geography and History, emphasizes that the region has historically been structured around water supply and channeling.

"The people of Solsonès have built the region based on water management"

Marcel·lí Corominas · Historian and Project Promoter
The most significant finding of the research is the existence of a wastewater treatment plant in Solsona that was already operational in 1929. This date positions it as the oldest in Spain, predating the Molinet plant in Reus (1937) and the one in Madrid (1950). The facility, which included decantation bases and bacterial treatment, was built by the Ajuntament de Solsona following a typhus epidemic in 1923.
The engineer responsible for the project was Eusebi Martí Lamich, who designed an advanced technological solution for the time. Although the remains are currently covered, the Ajuntament has begun exploratory work to locate the cylindrical section and celebrate the centenary in 2029. Corominas announced that the discovery, based on plans and photographic reports from the Arxiu Comarcal, will be published in the journal Opidum in late March or early April.