Drinking water supply system with drinking water quality monitoring function, method for controlling same, and computer program

A drinking water supply system that receives water from a local water supplier at a central feed point of the drinking water supply system, the drinking water supply system comprising:

• a drinking water piping system comprising a main supply line comprising a hot water supply line and a cold water supply line and a subordinate supply line comprising a subordinate hot water supply line connected to the hot water supply line and a subordinate cold water supply line connected to the cold water supply line,
• a plurality of drinking water tapping points connected to the subordinate hot water supply line or the subordinate cold water supply line of the drinking water piping system, wherein the drinking water piping system conveys the water from the central feed point through the main supply lines and the subordinate supply lines to the plurality of drinking water tapping points,
• a central control device,
• at least one central feed point sensor configured to determine central feed point measurement values for one or different properties representative of quality of the water carried through the main supply line in the drinking water supply system at the central feed point, and
• at least one downstream sensor configured to determine downstream measurement values for the one or the different properties representative of the quality of the water carried in the subordinate supply line of the drinking water supply system at one or a plurality of downstream points in the drinking water supply system, which are spaced apart from the central feed point,
• wherein the central control device is configured to:
• receive and evaluate the central feed point measurement values determined by the at least one central feed point sensor and the downstream measurements values determined by the at least one downstream sensor,
• monitor the downstream measurement values determined by the at least one downstream sensor to determine whether the downstream measurement values exceed or fall below a limit value, and
• if the limit value is exceeded or if the downstream measurement value falls below the limit value, output a corresponding warning notification via a user interface, and
• wherein the limit value is determined as a function of the central feed point measurement values determined by the at least one central feed point sensor located where the water is received from the local water supplier.