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All but one Armenian river basin, Ararat, had river sites where the current ammonium concentration exceeded the recommended concentration for cyprinid fish. In total, 49 % of sites exceeded recommended ammonium concentrations. Most of the elevated concentrations were found downstream of settlements, but some were found above settlements, possibly because the headwaters are not protected by legislation. The Armenian authorities are filling the gap in the legislation to protect headwater areas, starting with the Akhuryan river basin. The recommended BOD level for salmonid fish was exceeded at 31 % of monitoring locations in Armani. Two sites also exceeded the BOD threshold for cyprinid fish. The good/moderate thresholds in the national legislation are generally higher than the recommended levels in the EU Fish Directive.