The water in the canal turned blue, production was halted at the battery factory in Környe.

On November 4, production was suspended at the Volta ESH battery factory near Környe due to blue contamination in the drainage system. The environmental authority received a report on October 30 regarding the discoloration, leading to an inspection that confirmed visible pollution over a 100-meter stretch. The Komárom-Esztergom County Government ordered an immediate halt to operations in the affected manufacturing hall until the source of contamination is identified and rectified. The company began remediation efforts on October 31, constructing temporary barriers and pumping out 30 cubic meters of contaminated water. The exact cause of the leak, suspected to involve copper sulfate, remains unclear.