Northern Ireland Water says the hosepipe ban will remain in place, but the situation is “slowly improving”.
Demand is still 25% higher than normal due to the heatwave, particularly during peak times.
However the water company has thanked the public for their help in reducing usage and urged them to “keep working with us”.
NI Water boss Sara Venning said the ban “will not be lifted until we are confident there is enough treated water to meet the required water demands”.
The company also warned about incidents of fire hydrant abuse.
There have been 18 such incidents since Friday, in Belfast, Newcastle, Draperstown and Magherafelt.
NI Water urged communities to tackle this issue, as it can leave homes or businesses with no water pressure, or hamper the work of the Fire Service.