Twenty one additional wastewater treatment plants have been selected By Irish Water for upgrade as part of the Small Towns and Villages Growth Programme.
It follows the announcement of 15 projects earlier in the summer.
Working in partnership with Local Authorities, Irish Water says this investment in the local wastewater infrastructure will provide additional capacity for the development of new homes, while ensuring that wastewater continues to be treated to an appropriate standard.
In Mayo, a new wastewater treatment plant will be provided in Doogort, Achill to provide additional capacity for growth.
In Lecarrow, county Roscommon upgrade works to the wastewater treatment plant will take place at the existing site and in Mullaghmore, sligo a new wastewater treatment plant is to be provided.
Irish Water says it has announced these projects now to enable Local Authorities to make plans on housing and development into the short and medium term supporting their regional and local development plans.