Residents will be able to question water bosses about the change to the Workington supply tomorrow.
United Utilities has announced it will hold a drop-in session at St Mary's Church in Harrington between noon and 6pm.
Concerns have been raised from people living in West Cumbria following a change to the supply, which now mixes soft water from Ennerdale with hard water in Egremont boreholes.
Many residents claim the change has led to itchy skin, mouth ulcers and upset stomachs.
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