Landmark Hotel Dundee: 65 ill from a spa pool nobody maintained

BDL Select Operations Ltd, operator of the then-Landmark Hotel in Dundee, was fined £54,000 in January 2016 after the hotel leisure club’s spa pool caused an outbreak of Pontiac fever that left 65 people ill. The pool had not been fully drained, cleaned or disinfected for over two months, its filters were not being backwashed properly, and a failed chlorine injector meant the water had no working disinfectant at all.

The case is recorded in our legionella enforcement tracker and is the dataset’s clearest worked example of how a spa pool fails: not one mistake, but every control on the chain at once.

What happened

The Landmark Hotel’s leisure club in Dundee had a spa pool of the kind thousands of UK hotels run. Over a period in the run-up to the outbreak, its maintenance regime collapsed in stages. The pool was not fully drained, cleaned and disinfected for more than two months. The filters were not being backwashed as they should have been, so the material they trapped stayed in the system. And the chlorine injector — the device that was supposed to keep a disinfectant residual in the water continuously — had failed, leaving the water untreated.

The result was an outbreak of Pontiac fever, the milder, non-pneumonia form of legionellosis. Sixty-five people fell ill; eighteen were confirmed cases. Mercifully, and unusually for a spa-pool outbreak in the enforcement record, nobody died.

The investigation was taken forward in Scotland, so the prosecution was brought by the Crown Office and Procurator Fiscal Service rather than the HSE. BDL Select Operations pleaded guilty on indictment to two charges under the Health and Safety at Work etc. Act 1974 and was fined £54,000 at Dundee Sheriff Court in January 2016.

The failings the inspectors found

HSG282, the HSE guidance for spa pools, sets out a layered regime: continuous disinfection, filter maintenance, and regular full drain-downs to remove the biofilm and organic load that dosing alone cannot shift. At the Landmark, every layer had failed:

• No full drain, clean or disinfection for over two months. The periodic reset the whole regime depends on simply was not happening. Our guide to hot tubs and spa pools explains why the warm, aerated, high-bather-load water in a spa needs exactly this discipline.
• Neglected filter backwashing. Filters concentrate what they remove; not backwashing them turns the filter into part of the problem.
• A failed chlorine injector. The continuous disinfection layer was off, and evidently nobody’s checks caught it — or the checks themselves were not happening. Daily disinfectant and pH readings, recorded, are what catch a dosing failure within hours rather than weeks.

Three independent controls, each designed to catch the failure of the others, all down at the same time. That is what “inadequate control measures” means in practice.

The fine and costs

The guilty plea on indictment — the solemn procedure used for more serious charges in Scotland — underlines that this was not treated as a technicality, even without a death. Sixty-five ill guests is a mass exposure event, and the sentence reflects it.

The lesson for duty holders

For hotels, gyms and any operator with a spa pool, the case is a maintenance checklist written as a cautionary tale:

• Layer the controls, and check each layer. Dosing, filtration and drain-downs back each other up. A regime that is only ever tested when something fails is not a regime.
• Instrument failures need catching the same day. A failed chlorine injector is invisible unless someone is taking and recording daily disinfectant readings. The record is the alarm.
• Pontiac fever still counts. The absence of deaths did not prevent prosecution on indictment. Any cluster of illness traced to your water system will be investigated to the same standard.
• Scotland enforces the same duties by its own route. HSWA, ACOP L8 and HSG282 apply north of the border; only the prosecutor and the court differ. Our Scotland template guidance covers what is and is not different.

The starting point is the legionella risk assessment for the pool and the wider water system, with the regime recorded in a log book someone reviews. The risk assessment builder is an indicative starting point; it records and organises what you find, and it never certifies a system as safe.

Source: STV News report on the Dundee hotel fine. Figures are recorded as published in our legionella enforcement tracker dataset; check the linked source before relying on any figure.