ABSTRACT. – Mining Activity and its Influence in the Crişul Băiţa Hydrographic Basin. Beside great benefits for economic life of region, mining activity involving the metallic ores and dissemination of metallic sulphides presented in the area involves a potential hazard on environment and quality of life. The paper summaries data on focused heavy metals as Zinc, Copper, Lead presence in water in watershed of Crişul Băiţa, due to waste waters resulted in mining activity.
Key-words: metalogenesis, mining activity, pollution, monitoring, purification.