The vast majority of households in northern Norway are connected to municipal facilities for water supply.

There are several indicators of water quality, where we have considered these four: color, intestinal enterococci, E.coli and PH. The water quality is generally high in the three northernmost counties, with some variations from year to year that are linked to individual municipalities.

All counties in the north have higher emissions of phosphorus and nitrogen from the wastewater sector than the national average. Nordland, Troms and Finnmark are all aquaculture counties, which is probably an important explanatory factor for the emissions in these counties being higher than on a national basis.