Due to their widespread presence among general public, mobile devices prove to be an excellent tool of communication. In this thesis we analyse the utilisation of such devices for alerting users about tap water quality by the local water distribution network concessionaire Komunala Novo mesto. We analyzed the current system of communication between the concessionaire and the tap water system users and on this basis we suggest improvements of the communication system by introducing a new application. We created an application for mobile devices running on mobile platforms Android and iOS that incorporates push notification services. These services enable faster and more efficient communication and consequently a better engagement of the users. As its input data, the application uses publicly available data about tap water quality, geolocation internet services, push notification internet services, and spatial application programming interfaces on mobile terminals. We conclude that modern application building tools enable the production of advanced mobile applications available on any mobile platform that bring significant improvement to the quality of communication between service providers and users.