Legionella in tap water is a serious health hazard

Legionella in tap water is a serious health Hazard WHO (World Health Ogranization) declared Legionella the highest health burden of all water borne pathogens in 2017.

In 2016 EU registered app. 6.500 cases of Legionellosis. Experts suspect a large number of unreported cases of up 30.000 infections annually. Reported Legionellosis cases resulted in a mortality of up to 15%.

Legionella occur in natural waters in low concentrations. Public water supply brings them into building and technical water systems. Legionella can proliferate at water temperatures between app. 25°C up to 45°C to concentrations with high risk for water consumers. Aerosols can transmit Legionella pathogenic and infect consumers. Aerosols occur from showering, in swimming pools or air conditioning.

Effective prevention from Legionella infections starts with regular monitoring ofwater systems for risk factos and Legionella concentration.

Legionella monitoring of water – current status


German drinking water legislation (Trinkwasserverordnung TrinkWV) requires residential and other water systems with public access to be monitored for Legionella on a regular basis to Prevent health risks for users.

This includes hot water systems of residential buildings for rent, hospitals and nursing homes, schools and kindergardens, hotels and restaurants, sports facilities and public swimming pools, as well as public and industrial buildings.

If Legionella concentration exceeds a critical value, owners and operators of water systems have to implement costly remedial actions involving health authorities in charge, followed by more frequent check-up examinations.

Also other countries in EU and worldwide have legislation governing critical values and regular monitoring for Legionella concentration in water. Currently, only one procedure is commonly approved for water testing, the „Gold Standard“ based on ISO 11731. Only accredited labs are authorized to perform this standardized test.

Samples are being taken manually on-site by trained personnel. The test itself is based on cultivation and counting of colony-forming units. This requires up to 10-14 days until operators receive results.

And besides test results operators won´t receive any additional information regarding state and Risk factors of their water system.

BlueLab automatizes and digitizes regular Legionella monitoring

BlueLab has developed a unique technology that enables automatic on-site testing of water systems for Legionella. At the same time the water systems are being monitored for risk factors associated with Legionella growth.

This technology fits in a small device to be installed on-site at the sampling points. The device transmits data and test results wireless to BlueLab´s server and provides operators with transparency and control of their water systems almost in real time.



Advantages at a glance:


• Automatic testing, digitized and wireless handling of results

• Coninuous screening of water systems and risk prediction

• High sensitivity and specificity for all relevant Legionella species

• Results available almost in real time

• Remote and central control of all sampling points and water
systems for Operators

• Maintence interval 5 years

• Competitive cost

• No more manual sampling, no more appointment scheduling for sampling, no more waiting for results from labs



Currently we develop our technology to production stage.


We anticipate to enter the market in 2022.

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