Although persistence in drinking-water is possible, there is no evidence from surrogate human coronaviruses that they are present in surface or groundwater sources or transmitted through contaminated drinking water. The COVID-19 virus is an enveloped virus, with a fragile outer membrane. Generally, enveloped viruses are less stable in the environment and are more susceptible to oxidants, such as chlorine. …… In places where centralized water treatment and safe piped water supplies are not available, a number of household water treatment technologies are effective in removing or destroying viruses, including boiling or using high-performing ultrafiltration or nanomembrane filters, solar irradiation and, in non-turbid waters, UV irradiation and appropriately dosed free chlorine.
Legionella Cases are still increasing in Europe, and very high in Denmark. There was a 23% increase in the number of cases in 2018 compared with 2017. Four countries (France, Germany, Italy and Spain) accounted for 71% of all notified cases in 2018. Read more on the newest ECDC report.