An EPA report has shown a fall in the number of towns and villages discharging waste water daily.
Uisce Eireann says delays in the planning system have affected how quickly projects are completed.
The water utility has been criticised in a new report by the Environment Protection Agency on wastewater treatment.
The EPA says delays in upgrades are having a negative impact on rivers and coastal waters.
However, Uisce Eireann is highlighting 94% of its treatment plants are now in line with the Urban Wastewater Treatment Directive.
Michael Tinsley, Senior Wastewater Delivery Manager at Uisce Eireann, says there have been delays in getting projects approved through the planning system:
There's been a drop in the number of towns and villages discharging raw sewage every day.
A new EPA report shows the number has fallen from 29 down to 16 since the start of 2023.
The report also highlights the need for improvement measures in three midlands towns to prevent wastewater discharges from harming rivers, estuaries, lakes and coastal waters.
They are Portarlington, Kilcormac and Ballymore, however, works aren't scheduled to get underway until at least 2029.
Environmental Protection Agency Programme Manager, Noel Byrne says there's room for improvement:
Asthma Society of Ireland Hold Workshop In Laois This Weekend
Laois TD Calls For Shorter Ambulance Deployment Distance
Uisce Eireann Publish Shannon Pipeline Consultation Submissions Report
70% Of Farming Families Lack Succession Plan
Mental Health Charity Triple Counselling Sessions After Citywest Protests
Westmeath Library To Close For Three Months From Today
Drug Usage On The Rise In The Midlands
Over 80 Jobs At Risk In Westmeath Tech Plant
Shannon Callows Farmers Demand Inclusion In Flood Management Group
Offaly Teachers Win National STEM Award
Appeal Lodged Against 600 Acre Laois Solar Farm Project
Government Funding To Benefit Midlands Historical Structures
Former GAA Referee Pleads Guilty To Indecent Assault
Laois TD Warns EU Plans Threaten Irish Neutrality
Almost One Million Cigarettes Seized In Offaly
Management Can Easily End Industrial Action - SIPTU
Westmeath Credit Union Manager Wins Lifetime Achievement Award
Midlands Readers Encouraged To Take Part in MS Readathon
Westmeath Town Strong Performer For Fibre Broadband
Ireland's Oldest Living Person With EB Publishes Autobiography