Sulfuric acid found in Polish city's sewers

Authorities in Inowrocław, a city in north-central Poland, have discovered illegal sulfuric acid in the municipal sewage system.

Authorities in Inowrocław, Poland, discovered a high-concentration, illegally discharged sulfuric acid in the city’s sewer system, likely the result of a deliberate operation.

Photo: Wolfgang Hasselmann/Unsplash.com/CC0

Workers at the local water utility found the hazardous substance being discharged from an unauthorized setup at a company on Pakoska Street.

According to TVN24, the concentration of the acid was so high that it burned through a regular sewer manhole, and all evidence suggests it was a well-planned operation. The incident has prompted investigations by Poland's sanitary and environmental authorities.

Do kanalizacji miejskiej w Inowrocławiu trafił kwas siarkowy.https://t.co/r1kK0UtbW9

— tvn24 (@tvn24) September 25, 2025

The incident has prompted investigations by Poland's sanitary and environmental authorities.

Inowrocław police are also conducting a probe and are awaiting the results of water samples.

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Source: IAR/TVN24