Table 1.
Drinking water treatments among the population of Norway in 2009
| Treatment process | Number of people supplieda | Proportion of population supplied (%) |
|---|---|---|
| Coagulation/filtration onlyb | 935,000 | 19 |
| Membrane filtration | 141,000 | 3 |
| UV treatment onlyb | 1,399,000 | 29 |
| Coagulation/filtration and UVb | 995,000 | 21 |
| Other (including groundwater supply) | 1,269,300 | 26 |
a
Estimated population of Norway at the time of data collection (2009): 4,799,300.
b
People supplied by water with UV treatment in total was 2,394,000 and by coagulation and filtration in total is 1,930,000, of whom 995,000 are supplied with water with both treatments.