Zawiercie region has four deposits of zinc and lead ores of 16,7 km² total area. They are situated at depths ranging from several metres to several hundred metres. If a decision is taken to start mining of these resources it will bring about a serious ecological controversy since large parts of region remain within borders of Jurassic Landscape Parks complex. Current ecological status and projections of environmental disturbances in Zawiercie region are discussed particularly with respect to environmental pollution and water cycle changes (drainage of soils).