£12 Million Upgrade at Derg Water Treatment Works

02 March 2022 16:49

NI Water is pleased to announce that construction work is well underway and progressing well on a major £12 million upgrade at Derg Water Treatment Works (WTW).

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. The upgrade will see the construction of a new clarification process and activated carbon addition, which will enhance water treatment at the Derg WTW site.

The 18-month construction contract is being undertaken by Castlederg-based Lowry Building & Civil Engineering as part of the wider DLG Water Ltd, with RPS providing project management specialist support. Work is expected to be completed by March 2023.

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.

Pictured is the new clarification process building under construction, which will also provide activated carbon addition at the Derg WTW site.