The rapid development of Industry 4.0 and the digital transformation forced the water and sewage industry to integrate new IT technologies into the OT operating environment. Water and sewage industry companies more and more often demonstrate increased awareness of risks related to business continuity and cybersecurity, occurring not only in IT networks, but also in OT networks. Ongoing convergence of Information Technology (IT) networks and Operational Technology (OT) networks increases complexity and vulnerability to industrial control systems (ICS) threats