Sammendrag
A brief overview of the chemical composition of drinking water in Nor way is presented. The chemical quality of Norwegian drinking water is , by and good. The largest problems are coloured water due to high co ncentrations of humic compounds, and water that is corrosive towards pipes, plumbing and other installations. The water is corrosive due t o naturally low contents of calcium and bicarbonate, and due to low p H values, especially in regions of the country affected by acid preci pitation. Corrosion implies elevated water levels of copper, zinc, ir on, lead and other components. The levels are generally not high enou gh to represent a significant health threat, corrosion is mainly an e conomic problem, of considerable proportions. The contents of most c onstituents in Norwegian drinking water vary over a range of 100 or m ore, and show clear geographic patterns. Toxic metals, such as lead, cadmium, mercury and arsenic represent an insignificant problem in No rwegian drinking water. On the other hand, high contents of fluoride, mainly in water from drilled hardrock wells, may represent a larger problem than previously realised.
Vis fullstendig beskrivelse