North Aegean Slops S.A. was immediately mobilized to response to an oil pollution incident that contaminated a tank that provides drinking water in the city of Thessaloniki. As instructed by Thessaloniki Water Supply & Sewerage Co. S.A. (EYATH SA), on 14.01.2018, specialized scientific and technical staff of our company came to the contaminated sites, along Aliakmonas river (Ag. Varvara, Vrachia, Sindos, Tank D2) and assessed the situation in terms of antipollution equipment, means and methods. Then, supported by floating and land means, special absorbent materials, oil recovery mechanisms and floating booms have been applied, minimizing in such way the risk and restoring the initial water quality conditions. The anti-pollution project continues until today as a precaution and is expected to be completed in the near future.