The Zlatè Hory Mining District is the biggest mineral deposit of base metals in the Czech republic. The mining has been going on for many centuries and the water and ground is polluted by heavy metals from the mines. The concentrations of copper and zinc in the brooks draining the area is comparable to the concentrations found in Norwegian mine polluted rivers. The biology in the brooks is a affected and in some parts of the river system there is no fish. The river through Zlatê Hory is a tributary to the River Odra in Poland. To be able to compare the results from this area an intercalibration of methods for chemical analysis was performed. The results are given in this report.The Norwegian Minitry of Environmen
