These Proceedings of the International Mine Water 2019 Conference in Perm, Russia include the peer-reviewed papers of the vibrant community of scholars, practitioners, experts in mine water management, mine water treatment and environmental restoration on the global and local levels. Ten tracks of the Conference, ranging from mine water geochemistry and mine water hydrogeology to environmental monitoring and the future of the closed Kizel coal basin, are reflected in the conference theme “Mine Water: Technological and Ecological Challenges”. Over 200 participants from 42 countries come together to discuss the most burning issues of finding new solutions and bringing cutting-edge technologies into mine water treatment and preventing damage to the unique environments and ecosystems in different corners of the world. The Proceedings offer an outstanding opportunity to acquire the most advanced methods derived from interdisciplinary research and expertise in the field of mine water worldwide.