Tendring DC has confirmed it is being prosecuted for failing to manage the risk of Legionella at its leisure centre sites.
An investigation was launched by the Health and Safety Executive (HSE) after a customer contracted Legionnaire's Disease after visiting a Walton-on-the-Naze Lifestyles leisure centre in 2016.
Council chief executive, Ian Davidson, said: 'As soon as we became aware of the presence of Legionella bacteria at the new facility at Walton-on-the-Naze Lifestyles we moved to address the issue immediately, with the centre closed for three months while remedial works took place.
'Our investigation was quickly widened to include a review of our systems and practises right across the council and, working alongside the HSE, these are now extremely rigorous.'