Drinking water is provided in the best quality by the water suppliers. But what happens to the water in the pipes and house installations. If it is used less, it is in the lines (e.g. many apartments, houses and tourism businesses are currently empty). The increasing use of hot water storage tanks and treatment devices, errors in maintenance and improper construction materials can result in serious health problems here.
Legionella usually feel very comfortable in a temperature range between 20 ° C to 55 ° C. So exactly the area in which most hot water systems (hot water supply and hot water storage) work.
Pseudomonas aeruginosa are prone to biofilms and survive in a wide range of temperatures.
Among other things, they are problematic here
- the stagnant water, i.e. the water that is not flowing in the pipes and fittings
- increased temperatures in the cold water area - e.g .: pipes are not rinsed with cold water.
- not or poorly maintained water treatment systems
- seldom used pipe and fitting systems
If a pipe is not used for a longer period of time, the bacteriological parameters (according to the Drinking Water Ordinance also include Escherichia Coli, Enterococci and Coliforms) are included checkin order to obtain certainty about the adequate drinking water quality here.