The crucial problems for the Debowiec formation aquifer, situated on the borderland of Poland and Czech Republic: mitigation of hydrogeological hazards and water inflows into coal mine workings situated below, restraining the mining drainage responsible for depletion of the non-renewable groundwater resources, estimation of CO2 sequestration potential of the aquifer are discussed in the paper. However the first steps, taken by the research groups from Polish and Czech Universities, in cooperation with mining companies were undertaken, these issues require comprehensive solutions in the spheres of mine safety legislation and improvement of information exchange.