An unusual sight greeted residents of Miskolc on Tuesday as stretches of the Szinva stream, which runs through the city, took on a vivid orange hue. The striking discolouration quickly fuelled speculation, with authorities and specialists arriving at the scene shortly afterwards.
Cause of discolouration identified – could it happen again?
By the end of the day, a clearer picture had begun to emerge. According to Mayor József Tóth-Szántai, preliminary investigations suggest the source of the pollution can be traced to the Tatár Street heating plant. Maintenance work had been under way on one of the steam-generating boilers operated by Miskolci Hőszolgáltató Kft (MIHŐ), during which water containing iron oxide was discharged from the system.
The water should have been directed into the sewage network. However, due to a technical fault or human error, some of it is believed to have entered the Szinva instead.
Iron oxide, a key component of rust, readily explains the stream’s conspicuous rusty-orange colouring. Firefighters, police, municipal staff and other experts carried out on-site inspections. Current information indicates that the substance poses no health risk to humans.
That does not mean the incident will pass without consequence. The mayor stressed that the contamination had caused damage to the stream’s ecosystem, calling the situation unacceptable. A full investigation has been ordered, and MIHŐ’s management has been asked to provide immediate answers as to how the incident occurred, who bears responsibility, and what measures will be taken to prevent similar cases in future.
Colour expected to fade quickly
The timing of the incident is particularly sensitive, as the heating company is currently undertaking its annual summer maintenance across several district heating zones in Miskolc. It remains unclear how closely the present case is linked to those works.
The episode has once again drawn attention to the vulnerability of urban waterways. Although the Szinva’s orange tint is expected to dissipate quickly, experts must still assess the extent of the damage to aquatic life.
The investigation is ongoing, with city officials promising further updates once findings and potential consequences have been established.
An unusual sight greeted residents of Miskolc on Tuesday as stretches of the Szinva stream, which runs through the city, took on a vivid orange hue. The striking discolouration quickly fuelled speculation, with authorities and specialists arriving at the scene shortly afterwards.
Cause of discolouration identified – could it happen again?
By the end of the day, a clearer picture had begun to emerge. According to Mayor József Tóth-Szántai, preliminary investigations suggest the source of the pollution can be traced to the Tatár Street heating plant. Maintenance work had been under way on one of the steam-generating boilers operated by Miskolci Hőszolgáltató Kft (MIHŐ), during which water containing iron oxide was discharged from the system.
The water should have been directed into the sewage network. However, due to a technical fault or human error, some of it is believed to have entered the Szinva instead.
Iron oxide, a key component of rust, readily explains the stream’s conspicuous rusty-orange colouring. Firefighters, police, municipal staff and other experts carried out on-site inspections. Current information indicates that the substance poses no health risk to humans.
That does not mean the incident will pass without consequence. The mayor stressed that the contamination had caused damage to the stream’s ecosystem, calling the situation unacceptable. A full investigation has been ordered, and MIHŐ’s management has been asked to provide immediate answers as to how the incident occurred, who bears responsibility, and what measures will be taken to prevent similar cases in future.
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Colour expected to fade quickly
The timing of the incident is particularly sensitive, as the heating company is currently undertaking its annual summer maintenance across several district heating zones in Miskolc. It remains unclear how closely the present case is linked to those works.
The episode has once again drawn attention to the vulnerability of urban waterways. Although the Szinva’s orange tint is expected to dissipate quickly, experts must still assess the extent of the damage to aquatic life.
The investigation is ongoing, with city officials promising further updates once findings and potential consequences have been established.
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