On Saturday afternoon, emergency services were alerted to an oil leak in the Kolbäck River, prompting immediate action to contain the spread with booms. By Sunday, additional booms were sourced from Ludvika to cover the entire channel in hopes of better capturing the oil, but the leak appeared to return by Wednesday morning after it had initially stopped by Tuesday afternoon. The situation's severity remains uncertain as officials struggle to pinpoint the oil's origin.

Patrik Eriksson, the street manager at NVK, stated that it’s too early to assess the oil leak’s seriousness as they have yet to identify the source. Daily checks are being conducted to ensure the oil does not spread downstream, and so far, these checks have not revealed any further spread. The response team is committed to monitoring the situation closely while they search for possible leak sources.

Additionally, the environmental unit from Avesta is investigating the leak and plans to deploy drones to scan for any leaks underwater. Although the root cause of the oil spill is unclear, the authorities have various theories regarding its origins, which will inform their next steps in addressing the environmental impact of the spill.