NI Water laid down the 5,000th pipe in Moira as part of the £14m Castor Bay to Belfast Water Pipeline.
Two new water pumping stations in Sprucefield and St Andrews (Temple) in Lisburn are now at an advanced stage which is part of the construction of the programme of works, as well as the upgrading of five local reservoirs.
The pipeline got under way in January 2014 and is on schedule to deliver key improvements to the water supply infrastructure in the area.
This major pipeline involves laying a new 29km water pipeline from Castor Bay Water Treatment Works in Craigavon to south Lisburn, where the pipeline will link into an existing trunk main to transport the water supply on to Belfast.
This major scheme will provide a vital source of water coming into Belfast, which will be especially important during future winters and in supplementing increased demand in the area.
Sara Venning NI Water Chief Executive, NI Water said: “With a total of 6,000 pipes on the overall pipeline, we are progressing well towards our summer 2015 target.
“This investment is good news for customers, as it will improve the security of the water supply infrastructure, as well as improving drinking water quality,
“I would like to take this opportunity to thank our customers and local representatives for their patience.”