Project Description

Glenveagh National Park

major upgrades to meet current drinking water standards


Client: Glenveagh National Park
Location: Letterkenny, Co. Donegal, Ireland
Date: 2019
Project: Design, Installation and Commissioning of 2 municipal drinking water purification systems.

Details: The Glenveagh National Park is a large tourist attraction located in Co. Donegal, with visitor numbers of 170,000 per annum.

The existing water treatment facilities were more than 20 years old, requiring a major upgrade to meet current Drinking Water Standards and the extra demands on the water system. It was decided by the Department of Culture, Heritage and Gaeltacht to award a contract for the upgrade works at two independent locations within the National Park, the Visitor Centre and the Castle. The aim was of the project was to improve water quality at both sites to comply with S.I. No. 122 of 2014 – EU Drinking Water Regulations 2014, with a particular emphasis on THM reduction.


Whitewater proposed two similar water purification systems based on the specifications by Ryan Hanley, the consulting engineers for the project. The water purification systems consisted of direct filtration by multimedia filters with upstream coagulant dosing (as the source is brackish lake water), followed by ultrafiltration, granular activated carbon filtration, UV units and primary / secondary hypochlorite dosing.

Due to the relatively remote location, there was a requirement that the systems operate automatically, to minimise on site attendance. A remote diagnostic pack was developed to meet this requirement.

During the installation phase, some of the challenges overcome were, fitting the plant into the confined space available, developing a system to handle the waste streams from one of the sites with no local drain access. The waste collection and pumping to site WWT plant was fully automated. The programme schedule was constrained by the requirement of having a fully operational plant prior to season start.

Energy and water saving were paramount, this was achieved by the use of VSD pump motors, low pressure ultrafiltration membranes, and automatic plant turn down during periods of low system demand. Water was saved by the use of equipment with low backwash volumes and extended inter backwash times.


The plants were duly handed over to meet the tourist season start, fully validated and commissioned, producing high quality potable water for consumers.

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