Green, toxic water now stains the Galician reservoir of As Conchas and the Portuguese Lindoso dam downstream. One year after Spain’s highest courts condemned the Xunta and the Confederación Hidrográfica del Miño-Sil y Limia (CHMS) for violating Fundamental Rights, the authorities’ inaction has allowed pollution to cross borders, sparking anger on both sides of the river Limia.
The legal fight began when the Tribunal Superior de Xustiza de Galicia (TSXG) ruled in July 2025 that regional and national administrations had failed to protect the rights to life, privacy, property, and access to clean water for communities near As Conchas. The Supreme Court confirmed the decision in early 2026, stating that the environmental disaster was not accidental but the result of years of neglect, despite clear evidence of harm from industrial livestock runoff.
In 2024, the As Conchas residents’ association in Galicia formally contacted Portuguese activists about water pollution around Lindoso, confirming the problem’s cross-border nature.
This June, as temperatures rose, the reservoir’s surface turned a vivid, unnatural green again. Runoff from around 400 pig and poultry farms continues to flow into the Limia basin, fueling toxic cyanobacteria blooms. The contamination has reached Portuguese territory, where the Lindoso dam is showing the same symptoms. The cross-border spread has pushed the issue into the political spotlight in Lisbon, where both government and opposition are demanding answers from Galicia.
Local residents, represented by their association and supported by CECU, ClientEarth, and Amigas de la Tierra, have returned to the TSXG. They are asking the court to compel authorities to carry out the ruling after officials failed to take meaningful action. So far, the only reported steps, paying court-ordered compensation, conducting occasional farm inspections, and sampling water, fall short of what the judgment requires: stopping environmental damage, restoring safe water, and protecting fundamental rights.
The residents also want A Limia declared a nitrate-vulnerable zone and a halt to new or expanded industrial livestock operations until the crisis is resolved. Their legal team points to ongoing toxic algae, persistent odors, and evidence of downstream contamination as proof that public health and the environment remain at risk. Delaying enforcement, they argue, only increases the danger and prolongs the violation of residents’ rights.
Most local media coverage of Lindoso in recent years has focused on tourism and drought, rather than legal disputes or pollution. In 2024, but, reports of visits and contacts between Galician residents and Portuguese activists appeared in the public sphere, reflecting growing public interest in cross-border water pollution.
Spanish courts have cleared local municipalities of direct responsibility but ordered the Xunta and CHMS to act immediately. The ruling set out specific obligations: environmental and health studies, permanent water-quality monitoring, public information systems, and concrete steps to reduce livestock pressure on the Limia basin. Residents now want the court to set deadlines, assign responsibility, and require regular progress reports to ensure the orders are followed.
As the toxic blooms reach Portugal, the As Conchas case has become a warning for other Spanish regions facing similar threats from industrial agriculture. The situation is another example of cross-border environmental risks that have prompted joint responses elsewhere, such as the recent storm naming agreement between Spain and its neighbors.
The gap between clear court rulings and real action remains stark. The courts have spoken, but political will to challenge the powerful livestock industry is still missing. Until authorities move beyond token gestures and enforce real change, the rights of people living along the Limia and now across the border remain unprotected. The case has moved beyond a local dispute, becoming a test of whether environmental justice in Spain can overcome entrenched interests and bureaucratic inertia. The longer officials wait, the more communities pay the price for their inaction.
