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In Georgia, the current BOD was below the national maximum permissible concentration of 6 mg O₂/l for all sites. Moreover, only two sites in the Kura river basin had BOD above the stricter criteria set in the EU Fish Directive for salmonid fish (3 mg O₂/l). However, 91 % of the sites belonged to the upper two ammonium concentration classes, and 36 % of the sites had average concentration above the national maximum permissible concentration (0.39 mg NH₄-N/l). Only two river sites in Georgia had current ammonium concentrations below the EU Fish Directive recommended level for cyprinid fish, and none were below the threshold for salmonid fish. While average BOD was slightly higher in the Kura than the Black Sea river basin, the opposite was true for average ammonium concentration. The high ammonium concentrations in the Black Sea river basin probably reflect the poor level of waste water treatment in this region.