
Last Friday, the Pisueña River, as it flowed through the town of Saro, presented a truly horrific scene. Thousands de peces They lay dead, floating on the surface or trapped among the rocks, while the water was murky and covered in thick foam, revealing the presence of some kind of contaminant. Locals and fishermen, like Luis, who went to the Devil's Bridge in Vega de Villafufre, described the scene with tears in their eyes: "It's all horrific, all burned, not a single fish is left." The ecological tragedy has mobilized the Civil Guard and the environmental agents, who They are investigating a spill of slurry from a livestock farm in the Saro mountains. as the main cause of death.
The affected species include trout, eels, cardoon fish, and wrasse, as well as amphibians. Manuel, another eyewitness, described the incident as "a tremendous ecological disaster" and expressed his concern for the river's recovery. Agents from the Seprona (Nature Protection Service of the Civil Guard) and the Regional Ministry of Livestock collected hundreds of dead specimens, many of which will be frozen to serve as evidence in the legal proceedings that have already begun. The formal complaint filed by Seprona guarantees that the case will proceed to trial , and the Cantabrian government itself is considering joining the case.
Origin of the spill and initial hypotheses
Investigations suggest the spill originated from a livestock farm located high on Mount Saro, from where the slurry reached the Saro stream, a tributary of the Pisueña River, and from there spread downstream. Although the initial hypothesis is that it was an accident, some residents suspect it may have been intentional. "At this time of year, the pastures aren't fertilized because they're burned, and some people have the brilliant idea of dumping it in the river," complained a resident who preferred to remain anonymous. The possibility that the spill was deliberate adds seriousness to the incident , since if confirmed, it could lead to prison sentences for those responsible.

The mayor of Saro, Miguel Ángel Prieto, expressed his profound confusion, stating that he couldn't understand how such a thing could have happened. Although currently on medical leave, he was alerted by residents on Friday night and called for a thorough investigation to ensure justice is served. According to experts , the financial penalties could be substantial, and criminal charges are also a possibility . Meanwhile, environmental agents continue to clean the riverbed and collect dead animals to assess the full extent of the disaster.
Contradictions about the extent of the pollution
One of the biggest concerns for the residents of Villafufre was that the spill would reach the Pas River, where the impact could be even greater. The Regional Ministry of Livestock assured them that, for the moment, this has not happened and that the analyses do not indicate that it will. However, the residents contradict this version and claim that the contaminated water is already reaching the Pas, although because of its greater flow, the effect is diluted and less noticeable. This discrepancy between the official version and the residents' perception adds uncertainty to the case , while the Seprona (Nature Protection Service of the Civil Guard) continues to take samples to determine the true extent of the contamination.
Furthermore, sources from the Regional Ministry confirmed that just a few weeks ago a livestock farmer in Soba was reported for a similar spill, indicating that these practices may be more common than previously thought. The recurrence of these incidents highlights the need for stricter controls on livestock farms in the region.
A devastated ecosystem
The damage is not limited to the fish. Weeks earlier, environmental agents had rescued hundreds of fish from the upper reaches of the Pisueña River, a common practice in summer to save them from seasonal droughts. These animals, which had been moved to ponds in the lower reaches, have also died as a result of the spill. The pollution has eliminated the food source for other species that depend on the river , exacerbating the impact on the entire ecosystem. Fortunately, no salmon were found among the dead fish, although there is great concern about the river's recovery.

The cleanup and sample collection efforts will continue over the weekend, and the Regional Ministry of Livestock plans to provide a detailed report next Monday. Meanwhile, the Civil Guard is continuing its investigation and has not ruled out further inquiries. The local community remains shocked by what happened.And many hope this disaster will raise awareness and prevent it from happening again in the future. The mass death de peces The Pisueña River serves as a reminder of how fragile the natural balance can be when human activity is not properly controlled.