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Hot tubs and Legionnaires’ disease, do you know the risk?

With a mini heatwave predicted across the UK next week, Hot tubs will be popular , we urge people to be aware  of the dangers  they can pose if not looked after correctly?

During 2020/21 there was also a huge rise in hospitality venues, hotels and staycation resorts installing hot tubs in their outside areas.


In the UK, if you’re a business and operate a spa pool or hot tub the Health & Safety Executive say you must carry out a legionella risk assessment and then implement control measures to keep pool users, staff and others safe from harm.


Ebay reported that hot tub orders rose by 1,080% in April 2020, and 276% year-on-year from 22nd March to 6th June 2021. Legionella can live in the water in hot tubs, spa baths and even garden hoses and the combination of warm weather and sitting (stagnant) water creates an ideal environment for them to grow.

Legionella cause a potentially fatal form of pneumonia, Legionnaires’ disease, which can be contracted by inhaling tiny water droplets containing the bacteria. Figures from Public Health England show a seasonal rise in Legionnaires’ disease cases from June to October.


In 2017 JTF warehouse, Stoke-on-Trent were fined £1m following the deaths of two men from Legionnaires’ disease (twenty others were also affected) after a hot tub on display at the store exposed people to harmful levels of Legionella. The firm admitted failing to ensure the safety of employees and customers under the Health and Safety at Work etc. Act 1974.

If you are considering installing a hot tub or spa bath at home, it’s a good idea to have a professional plumbing engineer for installation. It’s also very important to follow the manufacturer’s instructions for regular cleaning, disinfection and maintenance.

Legionella can multiply in as little as 2-10 days, meaning that those who let their maintenance and disinfection regime slip, could be at risk and so could their neighborhood. Hot tub owners are also advised not to cut corners and to be aware of all the maintenance costs before buying.

The Health and Safety Executive (HSE) have produced guidance specifically for spa pool systems through “The control of legionella and other infectious agents in spa-pool systems” (HSG282). HSE – Legionnaires’ disease – Risk systems – Spa-pool systems  This guidance:

“is primarily for those who manage or operate spa-pool systems and explains how to manage and control the risks from Legionella and other infectious agents. It will also help service suppliers, designers, manufacturers, importers, suppliers and installers of spa-pool systems meet their legal responsibilities.

As well as guidance on operating and maintaining commercial-type systems, there is specific advice on domestic-type spa pools or hot tubs used as part of a business activity, for example in holiday park rental units, hotel bedrooms with a dedicated spa and systems on display or at exhibitions.

If you own or are responsible for the maintenance of a spa pool or hot tub, run a holiday park, holiday letting property, or any business that has Hot tubs on site and are unsure of your legal obligations then contact us now


Tel: 0800 080 3045



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