Rail passengers will no longer be able to spend a penny at seven Dublin rail stations.
Iarnrod Eireann said it was closing the public toilets for financial reasons.
While saving money is the main priority, saving water is right behind it.
"It is planned to save €450,000 a year with these toilet closures and changes," said an Iarnrod Eireann spokeswoman.
The move affects passengers using stations at Adamstown, Parkwest, Fonthill, Balbriggan, Skerries, Rush and Lusk and Donabate.
Other stations in the Dublin commuter belt to lose their loos are Newbridge and Athy in Co Kildare.
The train station toilet at Rosslare in Co Wexford has also been shut.
Iarnrod Eireann intends to make the savings on cleaning, heating, lighting and water costs.
"All these stations are served by trains that have toilet facilities on board," said the spokeswoman.
"Commuters use these stations in the morning and evening and spend very little time in them.
"The usage of toilets at these stations was very, very low, and anti-social activity was also present, including drug use and significant incidents of vandalism."
The planned savings of €450,000 also include a switch from separate male and female toilet blocks to lower-cost unisex facilities at number of stations around the country.
The unisex toilets will only be available when staff are working in the booking office at those stations.