The Irish Penal Reform Trust is calling the practice concerning.
37 inmates in Portlaoise are currently 'slopping out'.
A total of 58 prisoners are currently engaging in the process in jails across the country with Limerick prison having the second highest figure at 21.
But the Irish Prison Service says they all have single cells.
However, Fíona Ní Chinnéide, from the Irish Penal Reform Trust, says it's still a concern - especially in the current climate:
Water Conservation Order To Be Lifted Early Across 13 Counties
Laois and Offaly are two of the 13 counties included.
Ploughing 2026 Live Day Two: Livestock Competitions Heating Up In Offaly
The President, The Taoiseach, and the Tanaiste were in attendance yesterday.
Man Arrested In Ploughing Championship Public Order Incident
A man in his 60s has been charged following yesterday afternoon's incident.
Gardaí Issue Public Appeal Over Missing Westmeath Teen
It's thought Aliyah Smyth Donnelly may have gone to Laois, Dublin, or Louth.
Ploughing Live 2026 Day One: As It Happened
The National Ploughing Championships saw 77,000 people attend on Day One.
Over 1,800 People Affected By Power Outage in Laois
The power outage has happened in Mountrath.
Offaly TD Reassures Solar Panel Homeowners Payment Scheme Not Set To Be Scrapped
It comes as the unit rate customers get for selling excess energy is set to decrease.
Sinn Fein Setting Back Irish Unity - Taoiseach
The party is collaborating with the heads of Wales and Scotland on the issue.
