There had been warnings for days asking Dannevirke residents to minimise their water use.
Last week, Tararua District Council warned that due to the heavy rain in the area, the water in the Tamaki River was turbid and they were using water from the impounded supply.
Messages had gone out asking people to conserve water, with suggestions on what to do, but it wasn’t enough.
A council spokesman said on Wednesday that ‘alternate day’ restrictions would be implemented “effective immediately”.