Commercial Water Systems That May Be A Legionella Source

18 February 2025

If your commercial building is home to lots of different plumbing systems, then it is your responsibility to ensure that this water supply is clean and free from harmful bacteria. Neglected water reserves could contribute to the spread of bacteria such as legionella, which can trigger serious cases of pneumonia if it finds its way into the human body.

Good maintenance and cleaning routines can help to reduce the risk of this bacteria developing, where it tends to grow in stagnant water that fluctuates between high and low temperatures. As such, legionella can be found in all kinds of water systems and commercial plumbing installations, potentially putting your staff and the environment at risk.

Read on to find out more about the various commercial water systems that could be a legionella source.

Water Tanks & Heaters

Many commercial buildings house large water tanks, where these may be used as part of a hot water system, or to provide water for fire suppression and agricultural purposes. These tanks can be a breeding ground for legionella, particularly if the water temperature is not hot enough to kill off harmful bacteria.

Decorative Fountains

An ornamental fountain can make for an attractive addition to a commercial space, but it is important that these installations are maintained correctly to prevent legionella growth. Bacteria flourishes in stagnant water, especially if this water is not drained at regular intervals.

Swimming Pools & Spas

If you’re running a leisure or sports facility, then it is essential that you’re minimising the risk of a legionella outbreak. Pools, hot tubs and spas can all be home to bacteria if they are not properly disinfected and chlorinated, where contaminated droplets could be inhaled by swimmers and staff alike.

Humidifiers

Some commercial spaces in dry climates depend on humidifiers to create a comfortable indoor environment, but these installations can also become contaminated by bacteria. If they’re not cleaned and emptied regularly, humidifiers can be a source of legionella, where bacteria may be released into the air as a mist.

Caledonian Heating & Plumbing: Dependable Legionella Testing For Your Business

As members of the LCA (Legionella Control Association), we’re able to check that your water systems are free from harmful bacteria. We can also ensure that you’re compliant with legionella legislation, whilst completing in-depth risk assessments.

So whether you’re maintaining a leisure facility or heating a large commercial building, we can work to make sure that your water supply is clean and safe.

Get in touch with us today to find out more about our legionella control services.

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