Manganese is a naturally occurring mineral which is present in the raw water source for Clogh-Castlecomer

Irish Water, in conjunction with Kilkenny County Council, will begin cleaning of the water distribution network in the Castlecomer area to address long-standing issues with manganese build-up in the pipe network on Tuesday the 4th September.

Manganese is a naturally occurring mineral which is present in the raw water source for Clogh-Castlecomer. It does not pose any health risk but has caused discolouration of the water.

To minimise the occurrence of manganese in the water, Irish Water have taken a three pronged approach to improve the situation for customers, namely cleaning of water storage reservoirs, improvements to the water treatment processes and cleaning of the trunk mains on the water supply network. The next element of work is related to cleaning out sections of the water network. Irish Water will carry out a cleaning process known as ice-pigging which involves pumping an ice solution into the pipeline under pressure to remove any built-up sediments and deposits. This is a very effective way to remove manganese deposits and will lead to a much clearer water supply for customers in the area.

The work will be carried out on behalf of Irish Water by Glan Uisce Environmental Solutions Ltd (GUESL) in the Moyhora, Clogh and Moneenroe areas of Castlecomer.

Whilst these works are not expected to result in water outages, it is likely that there will be some minimal disruption to supply while the process is being undertaken and the Pig is passing the connection point to a customer’s property. Customers will know that Ice Pigging is been undertaken in their areas as the contractor will have signage at both ends of the run in which they are working. As the process should only result in potential short term disruption, customers will not be notified individually.

Initially works will be undertaken at night, to minimise disruption to customers along the network with respect to supply and discoloration of the water. These initial works will be in the vicinity of the Moyhora reservoir and the R426.

Please note that the works may initially result in additional discoloration of the water during the cleaning process, and it would be recommended that customers, where possible, minimise the use of mains water whilst Pigging is being undertaken outside their property.

The ice slurry is comprised of a brine solution which is made from both drinking water and a food grade salt (Sodium Chloride). The works are of short term duration and only in rare circumstances is excavation required to address a blockage or an issue at a particular point.

Irish Water are continuing to examine solutions to address the manganese issue in the longer term, including the option of identifying a new source of raw water. However this is a long-term investment requiring significant forward planning, design and lead-in time. It is hoped that the actions outlined above will help to reduce the discolouration issue in the interim. We would like to thank our customers and elected representatives in Clogh and Castlecomer for their patience, engagement and support while we work to address this issue.

Customers with queries or concerns should contact Irish Water at 1850 278 278 or view our Frequently Asked Questions in relation to water quality.


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