The Stripa mine, located in Bergslagen, Sweden operated from the Middle Ages until 1977 and later served as a research facility for SKB until 1991, after which it was flooded. Recent studies show a notable increase in uranium concentrations in the mine water, reaching nearly 1 mg/L at 200 m depth, compared to historical levels of 10 mu g/L. This increase is linked to uranium(IV) oxidation by elevated dissolved oxygen. Further research should investigate key biogeochemical processes controlling uranium transport and long-term environmental persistence. The findings highlight regional environmental risks, including potential contamination of wells, emphasizing the mine's long-term environmental impact.