You can either have municipal water or use your own well.
The drinking water in the municipality of Kungsbacka is primarily sourced from Lygnern/Fjärås Bräcka. We produce good quality drinking water that regularly is counted as one of Sweden's best.
If you have your own well, you must yourself check whether its water quality is good.
Here, you can read more about drinking water in Kungsbacka (in Swedish)