In the Oder River, the border river between Germany and Poland, thousands of dead fish have been discovered again, this time near the city of Frankfurt on the Oder. Local authorities have warned residents against contact with the water, this also applies to pets and those for use.
It is still not clearly known what is the reason for the mass death of fish, which was announced for the first time two weeks ago. Since the end of July, Polish fishermen have found tons of dead fish 300 km away. The Polish authorities found in two places a dangerous poisonous substance, probably Mesitylene, which has fatal consequences for fish. Later tests showed no evidence of Mesitylene.
Other water samples taken by German authorities show high levels of mercury on the German side of the Oder in Brandenburg, public radio rbb reports. Mercury is very dangerous for both humans and animals. But the Oder River has other problems as well. Heat and drought. This causes the fish in the water to have a small amount of oxygen, and the reason lies in the low water levels. When they are stressed they breathe faster and that means they need more oxygen, says Christian Wolter, research fellow at the Leibniz Institute for Aquatic Ecology.

The Polish MEP, Małgorzata Tracz, expresses her anger at the slowness of the authorities' action. Despite the announcements of an environmental disaster, the Polish authorities did not warn, not even to avoid contact with water. According to Małgorzata Tracz, 8 tons of dead fish were found in the vicinity of Olava alone. "The problem is huge. It's not something you can ignore or fix itself." Even local fishermen are shocked at the situation.
German associations demand better protection of the Oder
German associations blame insufficient measures for the mass death as well as the lack of cross-border cooperation between Germany, the Czech Republic and Poland. MEP Małgorzata Tracz recalls that the three countries are connected through a joint ecological agreement. Even the Association for the Protection of the Environment and Nature, BUND, criticizes the lack of cooperation. "This ecological catastrophe would not have reached these proportions if the German and Polish authorities had cooperated more intensively," says BUND leader Antje von Broock.

Since the end of July, dead fish have been lying around in the Oder River for several hundred kilometers," says Broock. Such a massive death is also a symptom of mistakes that have been made for decades and a consequence of the misfinancing of water protection./ DW