A recent study by Finnish Institute for Health and Welfare (THL) reveals that the quality of domestic water is generally good in Finland. In the study concerning bacterial communities in domestic water, small amounts of genetic material from bacteria such as bacteria of the legionella genus were detected in domestic water. However, hardly any pathogenic bacteria were detected. The genetic material of bacteria alone does not pose any risk.
The bacterial species, the diversity of the species and the bacterial genera containing pathogenic species were different in the waters of the different cities depending on the disinfection method used for domestic water, other treatments and the raw water used for the production of water.
Read the article on the THL web page.