NI Water Hosts Tour of Derg Water Treatment Works Upgrade for Drinking Water Inspectorate

23 February 2023 12:00

Pictured is NI Water’s Irwin Brannigan hosting the tour for DWI colleagues.

NI Water hosted a visit for DWI (Drinking Water Inspectorate) colleagues to see the final stages of construction and commissioning at the new upgrade at Derg Water Treatment Works.

The purpose of the visit was to give an overview of the new plant and construction process, as well as a chance to see the new tanks before they are fully commissioned and filled up with water.

Once complete, this essential investment will not only improve the water quality within the Derg network but will also provide additional security of the water supply to our customers in the Castlederg and Strabane supply area and further afield.

The existing Derg Water Treatment Works was built in 2002 and replaced the old works a few hundred meters from the current site. This upgrade, which is now in the final stages, involved the construction of a new £8 million clarification process at the plant and a £4 million carbon addition project, representing a total investment of £12 million, which will further enhance water treatment at the Derg plant. 

Once complete, the project will also improve herbicide and organics removal at the plant, improving the efficiency of the existing works and will increase the throughput of Derg WTW to over 26 million litres of water per day from the River Derg and more recently, Strule. The works serves the Strabane and Omagh areas as well as supplying water into the Fermanagh area.