Almost 4,000 residents in Carrick-On-Suir can consume water as normal following the lifting of the water boil notice.
The decision comes following consultation with the HSE and Tipperary County Council.
The boil water notice was issued on in late December due to high levels of turbidity or discoloration in the raw water supply at the Linguan source.
Colin Cunningham, Irish Water Lead in Tipperary says the company acknowledges the impact and inconvenience caused by the imposition of a boil water notice to homes and businesses, especially over the Christmas period.
Mr Cunningham says our priority is the provision of safe, clean drinking water and safeguarding that water supply for the future is a vital focus.
Business customers will receive a 40 per cent rebate on the cost of the supply of water to their businesses for the duration of the Boil Water Notice and this will be back dated automatically to when the notice was issued.
