... international organisations and, subsequently, by comparing them with data available on Nigeria's own water quality. The standards considered included those of Australia, Brazil, Canada, ... Such analyses have been carried out in the catchment areas of national waters (such as the Ganga river basin) and in the catchment areas of transboundary waters (such as the Rhine, Mekong and ... criteria are based on variables that characterise the quality of water and/or the quality of the suspended particulate matter, the bottom sediment and the biota. Many water quality criteria set a...