The Water Quality of Revitalized Ponds in the Czech Republic Post-Mining Area

: This study assesses the water quality of the Sušaneck é Ponds in the Czech Republic post-mining area. Four monitoring profiles were chosen: the Sušanka River inflow into the Sušaneck é Ponds, two ponds and the outflow of the Sušaneck é Ponds to the Sušanka River. The sampling took place in a 14-day interval from March to October 2022. The monitored parameters were temperature, O 2 , pH, electrical conductivity, turbidity, nitrate nitrogen, ammoniacal nitrogen, total phosphorus, chlorophyll-a, COD Cr , BOD 5 and metals—Fe, Mn, Cu, Zn, Ni, Pb, Co, Cd, Cr. The results were evaluated in accordance with the Czech standard ˇCSN 75 7221 and Government Regulation No. 401/2015 Coll. Based on the evaluation data, it was found that the area of the Sušaneck é Ponds does not meet the limits of the government regulation for three out of the twenty parameters. According to the standard, Sušaneck é Ponds are mainly classified as highly polluted waters.