Upgrade works to the Tullow wastewater treatment plant are scheduled to begin in 2020 but this is subject to planning, land purchase and funding.
The details were revealed in the Carlow County Council's chief executive report for November which says the capital works would see a major upgrade to increase capacity at the plan "to cater for recent and future growth in Tullow".
The project is at tender stage for a design and build contractor with the contractor to be appointed to be begin design in Quater 1 of 2019 with a view to construction in 2020-2021.
The Irish Water Capital Investment Plan driven upgrade is to be delivered by the new Regional Contractor appointment.
Carlow County Council Water Services have been advocating for "an earlier delivery date in order to facilitate development".
Meanwhile the Muinebheag and Leighlin wastewater treatment plant upgrade has an anticipated works start date during 2021 subject to planning and funding.