The paper describes an environmental project ZmapujTo (www.ZmapujTo.cz) which is intended to fight against illegal waste dumps in the Czech Republic using a modern, effective and widespread platform. As a supporting tool a smartphone/tablet reporting application ZmapujTo has been developed. This freely available mobile application enables users to report illegal dumps and also overloaded of municipal waste containers. The project ZmapujTo is intended for all people who want to live in a clean environment in their cities, villages or countryside and additionally want to raise awareness of unacceptable environmental behaviour of people.Users of this GIS based mobile application can report illegal dumps quickly and easily by using their smartphones/tablets. Thus, everybody can use this interactive public web form to report illegal dumps in the Czech Republic. The objective of this project is to contribute to reduce environmental pollution caused by illegal dumps in the Czech Republic by making available a modern, effective and widespread platform for reporting and monitoring of illegal dumps.