Published Sunday, 13 November 2011
The company has extended its 'boil water warning' in the Co Antrim town for an extra two days, until Wednesday.
Around 3,000 people have been affected by the problem, which started last Tuesday after soil got into the distribution system during work to replace pipes.
NI Water says it is taking longer than expected to fix, due to the complexity of the system which extends 55 miles and is "mainly rural" in nature.
"The problem is taking longer than expected to resolve due mainly to the length and complexity of the local water distribution system," a statement said.
"Test results today are showing a significantly improving picture, although there continues to be some low level sample failures.
"We are continuing to ask customers in all affected areas to boil water before use, until we are absolutely sure that water quality has returned to normal levels.
"Northern Ireland Water is making every effort to restore the quality of water to the normal high standard as quickly as possible, through additional chlorine dosing and extensive flushing of the local water distribution system."
Frustrated residents told UTV they are "fed up" with the issue, which has forced them to boil water or use bottled water for almost a week already.
They said they have not been kept up-to-date on the repair works.
People in Bendooragh, Balnamore, Finvoy as well as the Ballymena Road and Bann Road areas of Ballymoney town are all affected.
They are being told to boil their water for food preparation, cooking and drinking - but not for bathing and washing clothes - until further notice is given.
© UTV News