spreads or? Tons of dead fish and beavers. Usage Warning!

Currently, massive fish mortality can be observed along the entire Oder. The responsible authorities on the German and Polish sides are currently investigating the background. As announced by the Brandenburg Environment Ministry, the Environment Department has asked the Polish authorities to clarify and activate the usual reporting chains. In addition, Old Oder was separated from Main Oder. Preparations are underway for the coordinated collection and professional disposal of carcasses. Residents are asked not to collect dead fish from the Oder or the beach area on their own. The cause of the poisoning may be in Opole, Poland (about 380 km from Frankfurt / Oder), where a complaint has been filed against unknown persons and the Public Prosecutor’s Office is investigating. Now there are warnings along the German provinces of Brandenburg not to eat fish and to avoid contact with Oder for people and animals.

Find dead beavers

In addition to many dead fish of various species, dead beavers are now seen. Paul Whitta tweeted: “#odra seems to be practically dead today. After the fish pictures yesterday you see dead beavers today.”

Due to the high temperatures, the low water level in the Oder River and the associated low oxygen content in the river are also possible causes, another user replied: “Fish can die as a result of heat if the water contains too little oxygen. But beavers Not affected.”

Oxygen levels higher than lower levels detected

The first reports of fish deaths in the Oder were recorded at the end of July. At that time, the State Environmental Protection Inspectorate took samples that showed that the oxygen concentration in the water was higher than the norm. “High levels of oxygen in the water, which differ from the usual concentrations during the summer period, i.e. high temperatures, low water levels or no flowers in the water, indicate an abnormal source,” the regulator wrote.

According to Twitter user Pawel Wida, about nine tons of dead fish have been recovered in Poland (as of August 9, 2022, 7 p.m.).

The Prosecutor’s Office in Wroclaw has investigated

According to the Environmental Protection Inspectorate of the Wroclaw Prefecture, a complaint was filed with the Prosecutor’s Office in Wroclaw on suspicion of an environmental crime involving surface water pollution, deteriorating water quality and destroying wildlife.

VIEP in Wrocław carried out activities in accordance with its terms of reference and cooperated with all authorities concerned with the case to gather appropriate information. All information was sent to the prosecutor’s office.

After August 1, mesitylene was not found in any of the samples from the Oder River in the Dolnośląskie Voivodeship.

From July 28, microbiological analysis showed the presence of organisms typical of the Oder in all examined samples.

Regardless of previous knowledge, the physical and chemical state of the water in the Oder is monitored daily.

Avoid contact with Oder, do not eat fish!

It is said from the German side that as long as there is no reliable information about the causes, concentration in the different sections of the river and potential dangers, it is recommended to avoid contact with the waters of the Oder for private or commercial purposes as a precaution and not to use the water.

Recommendation for action:
– Avoid direct contact with the water or the water directly connected to it.
– Clean the affected parts of the body well after possible contact.
Water sports enthusiasts are encouraged to be especially careful.
Do not allow pets or farm animals to drink or bathe in the water.
– Do not eat fish from the water.

The affected areas are:

Municipal / city: Eisenhutenstadt municipality, Nisemünde municipality, Luitz municipality, Wiesenau municipality, Vogelsang municipality, Neusell municipality, Brisko-Finkenherd municipality, Zeltendorf municipality, Barnem district, Uckermark district, Markisch-Oderland district, Frankfurt/Oderland

Reason in Opole?

According to the results of the research, 1,3,5-trimethylbenzene with a high probability was detected in Opole – a colorless liquid with an oily aromatic odor. It is a toxic substance, and inhalation and ingestion cause drowsiness, headache, cough, weakness and sore throat. The substance is irritating to the skin (the substance breaks down), eyes and respiratory system. Vapors have an anesthetic effect at higher concentrations. Trimethylbenzene was found at two sites in Poland, and intermittent rain further diluted the substance, according to Polish sources.

It is not yet known how the substance could get into the Oder.

my knowledge

(according to wikipedia)

mestilen (1,3,5-Trimethylbenzene): Mesitylene is found in petroleum and coal tar. It is obtained from acetone by distillation with sulfuric acid. Mesitylene is used as a solvent for resins and rubber and for organic synthesis (as an antioxidant). Mesitylene sulfochloride can be obtained by reacting with sulfuryl chloride and aluminum chloride. Inhalation and ingestion cause drowsiness, headache, cough, fatigue, and sore throat. The substance is irritating to the skin (the substance breaks down), eyes and respiratory system. Vapors have an anesthetic effect at higher concentrations.

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Photo: Oder Spree

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