Works are progressing and are on target across the four supplies

Four water supplies in Co. Roscommon remain on the Environmental Protection Agency’s (EPA) Remedial Action List (RAL) and Irish Water has prioritised a programme of works to ensure their removal for the benefit of over 19,000 people. Works are progressing and are on target across the four supplies namely Ballinlough/Loughglynn, Grangemore, North East Regional WSS, and North Roscommon Regional WSS.

The boil water notice was lifted on the North East Regional scheme in September of last year. The scheme was placed on the boil water notice two and a half years ago following the detection of cryptosporidium in the water supply. To address this, Irish Water installed a temporary water treatment plant consisting of coagulation, containerised filtration and a UV disinfection system at Lisheen Lake. This a temporary solution until such time as the permanent water treatment plant is commissioned and fully operational.

Construction works on the long term solution for North East Roscommon are continuing and involves constructing a new water treatment plant and intake works which will abstract and treat water from a new source at Grange Lough. This treatment plant will ultimately replace the temporary plant in operation at Lisheen Lake.  Work is scheduled for completion in the coming months.  This plant, when commissioned, will remove this scheme off the RAL subject to approval of the EPA.

Once the permanent plant is commissioned, the temporary, containerised unit, which is portable, will be reused and deployed at future sites that require UV and/or filtration.

The Ballinlough/Loughglynn plant is on the RAL due to inadequate treatment for cryptosporidium, and the scheme is also on a Boil Water Notice since January 2016. Cryptosporidium is a very real threat to the water supply if the proper barriers are not in place. Irish Water is focused on resolving these issues by extending the Lough Mask Regional Water Supply Scheme to both the Ballinlough and Williamstown communities. This project is being fast-tracked to ensure it is delivered as quickly as possible and is due for completion at the end of 2017 with the works to supply Ballinlough a priority. 

The Grangemore and North Roscommon schemes which collective supply water to over 10,000 people have periodically recorded elevated THM levels above the standard in the Drinking Water Regulations. THMs, or Trihalomethanes are chemicals formed by the reaction of naturally occurring dissolved organic material and chlorine which is used for disinfection in order to protect against pathogenic bacteria. Currently Irish Water is upgrading the North Roscommon Regional Water Supply Scheme which also supplies consumers in the South Sligo region. Works are continuing to optimise the treatment process at the North Roscommon Water Treatment Works and these works are due for completion by the end of 2017.

With regard to the Grangemore Water Treatment Plant it is intended to decommission this plant and supply customers from the Boyle/Ardcarne water supply scheme. These works are currently being planned and designed with completion due in 2018.

Speaking about the RAL and the ongoing work in Roscommon, Irish Water’s Regional Compliance Specialist Pat O’Sullivan said: “The publication of the latest RAL update is a confirmation of the focus and dedication of Irish Water and Roscommon County Council in ensuring the delivery of clean and wholesome water in the county.

“As a single utility Irish Water is able to conduct a comprehensive evaluation of the performance of Ireland’s drinking water production plants and where serious compliance challenges are found they can be tackled more effectively and efficiently. The decommissioning of smaller water treatment plants and rationalisation of water supply zones across county boundaries as has happened in Roscommon into Co. Sligo could only be achieved by a single utility.” 

The RAL is updated quarterly by the EPA for those water supplies where investment in treatment processes is required. Irish Water has a prioritised programme of investment for all schemes on the RAL.


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