People around Skerries are being asked to limit the amount of water they use.
Irish Water says it's dealing with increased demand, and a drop in reservoir levels.
Pressure in the area will be reduced between now and Monday to help build it back up.
Customers in the Loughshinny and Skerries Road, Rush areas are also being asked to conserve water.
The company says "the current dry spell and increased seasonal demand are contributing to the reduced available supply of treated drinking water."
"In order to avoid widespread water outages it is necessary to carry out water restrictions on the water supply in the coming days", a statement from Irish Water read.
Restrictions will take place until 11am Monday 11th, but will be lifted between 6am and 10am each day.
The following locations supplied with water from the Thomastown Reservoir are likely to be impacted by the restrictions:
· Hamilton hill
· Town Parks Newtown Parks
· St Patricks close
· Kellys bay
· Skerries Rock
· parts of Downside
· Hillside Gardens
· Moran View and Hoar Park