Over 300 Tons of Fish Die at a Major Fish Farm After a Drastic Drop in Water Levels

A significant environmental and economic crisis is unfolding in Hungary, as hundreds of tons of fish have perished in one of the country’s largest fish farming operations. The die-off has sparked a disagreement between the farm’s owner and local authorities over the root causes behind this alarming event.

The incident occurred at Rétimajor, an expansive fish pond system that spans 800 hectares and is situated to the south of Budapest, within the remains of the Sárrét marshlands. The complex is owned by Ferenc Lévai, who has managed the site since its privatisation in 1994. The area is internationally recognised for its ecological importance, classified as a wetland of significant conservation value under the Ramsar Convention and designated as a Natura 2000 site.

Lévai contends that inadequate water distribution upstream has drastically limited the inflow of water to the fish farm. He stated that the water levels have not met the ecological requirements necessary to sustain the area, with less than 50% of the required water surface being achieved. Speaking to reporters, he added, “We could not even reach the water level that Hungary’s most protected area would be entitled to.”

The owner attributes the massive die-off to a combination of prolonged extreme heat and poor water management. He explains that the shallow waters have rapidly heated up, leading to the formation of toxic gases that emanated from the sludge, subsequently poisoning the fish. Despite attempts to mitigate the situation, Lévai estimates that between 300 and 350 tons of fish have died, resulting in a financial loss believed to be between 400 million to 500 million forints (approximately £1.1 to £1.4 million).

In contrast, the Central Transdanubian Water Directorate has refuted Lévai’s claims of insufficient water supply. They assert that while they were prepared for drought conditions, they did not anticipate what is being described as a “heat-dome phenomenon,” which has led to widespread heating across the country. The authorities have implemented regional restrictions, mandating a reduction of fishpond water use by up to 20% and a 60% reduction in irrigation efforts.

According to the Directorate, the primary factor behind the crisis is not upstream water management but rather evaporation, with estimates suggesting that the extreme heat has caused around 100,000 cubic meters of water to evaporate per day. They maintain that the situation was exacerbated by the oxygen depletion in the heated water, rather than from any upstream water usage.

The environmental impacts of the fish die-off extend beyond economic losses. Lévai has expressed deep concern for the surrounding ecosystem, stating that the drying ponds are vital habitats for various rare amphibians and bird species. He recognises that assigning blame is less productive than seeking solutions to prevent future incidents. As a potential remedy, he has proposed that local agricultural producers consider building their own reservoirs to retain water during periods of higher availability.

The situation at Rétimajor highlights the growing tensions surrounding water management in an era defined by climate change and increasing weather extremes. The challenges of balancing agricultural needs with ecological preservation are underscored by this public disagreement, which reveals significant divides in policy and response among local stakeholders.

Calls for enhanced water management strategies are gaining traction as various organisations and conservationists raise alarms about the long-term implications for wildlife and biodiversity in this protected area. This incident serves as a poignant reminder of the interdependencies between human activities, environmental health, and the need for sustainable practices that can adapt to the realities of climate change.

As discussions about effective water management solutions continue, the fate of the fish farm and the surrounding ecosystem remains uncertain, underscoring the critical need for collaboration and innovation in addressing these emerging challenges.