This time last year the Island’s reservoirs were 71 per cent full. The company said that long-term forecasts predict below-average rainfall until the end of January.
It will be the first time since December 2011 that the plant will have been used out of necessity.
Helier Smith, Jersey Water’s chief executive, said: ‘At present there is no cause for concern. However with little rain forecast for the foreseeable future, we need to ensure resources are able to recover over the winter to provide sufficient reserves for next spring / summer.
‘The plant is being prepared for use and likely to go into production early December.
‘We are urging Islanders to use water wisely in order to help reduce waste and preserve water resources. Everybody can do their bit to help reduce the amount of water that is wasted, whether it’s in the home, the garden, at work or at school – many of the changes in routine are small and will hardly be noticed.’