The advisory was specifically issued for residents in the Gaston area who are customers of the RRSD, Dan Brown said this afternoon.
The advisory does not apply to its consumers in Roanoke Rapids or Halifax County.
He said results of a water quality test will be available Wednesday.
Brown said the RRSD recommends those affected by the low pressure and outages should boil water for drinking, making ice, brushing teeth, washing dishes and food preparation or use bottled water.
The recommendation includes boiling water before the water service is restored and when it is restored until further notice is issued.
In the earlier statement Brown said periods of low or no pressure in the distribution system increase the potential for back siphonage and introduction of bacteria into the water system.
The statement said out of an abundance of caution, when water service is restored consumers are advised to boil all water used for human consumption.
Vigorous boiling for one minute should kill any disease-causing organisms that may be present in the water.
The advisory remains in effect until further written notification is issued.