Uisce Éireann is warning of potential disruption to water supplies later this week due to strike action by members of the Unite trade union.
Water service workers in a number of local authorities will engage in work stoppages on Thursday and Friday.
Unite is seeking a commitment that water staff transferring from local authorities to Uisce Éireann will retain their public service status.
Uisce Éireann said that due to the industrial action, precautionary boil water notices will be in place in areas of Waterford and Tipperary from midnight tomorrow.
It is also warning of potential disruption to water services, in particular, the speed at which bursts to the water network are repaired in some other counties impacted by the strike action namely; Cork city, Cork county, Kerry, Fingal, South Dublin, Dún Laoghaire-Rathdown, Louth, Carlow, Galway city and Wexford.
"We would appeal to Unite to engage with the relevant representative bodies and avoid putting the water supply and wastewater service for homes and businesses at risk," said Tom Cuddy, Head of Operations for Uisce Éireann
"While Uisce Éireann is not a party to the dispute our incident management team is continuing to assess the potential impact of industrial action and we are working closely with management in the local authorities to put appropriate plans in place to minimise and manage any disruptions to water and wastewater services," Mr Cuddy said.
Unite said it is seeking the strengthening of existing commitments regarding protection of local authority workers involved in water services delivery and a removal of service and age barriers for those wishing to avail of redundancy options.
The dispute follows Unite members' decision to reject the 'Framework for the Future Delivery of Water Services' document put forward by the Workplace Relations Commission last year.
A spokesperson for the Department of Housing, Local Government and Heritage said that the framework is the right way forward as it sets out what will become available for workers and empowers them to decide voluntarily on the option which is best suited to their own individual needs.
