The pollution is being blamed on Intense rain yesterday and possible worsened by agricultural activities in the area.
The incident trigged the automated shutdown of borehole sources that feed raw water to the Ballyshannon Water Treatment Plant.
This is the second such incident at this plant, the first of which occurred in February.
Regional Information Specialist for the region Sean Corrigan explained: “The amount of water that we have available to treat has reduced significantly, the supply is being supplemented from other areas and Irish Water and Donegal Co Co are working hard to minimise disruption. As far as we are aware there are no outages at the moment, but with festivals and bank holidays it is a very busy period and we ask that people conserve water. Irish Water does not expect customers to experience any water outages but there may be a loss in pressure in some areas.”
Ongoing investigations are taking place to determine the exact cause of the incident.
Anyone who experiences a water outage over the weekend should contact the Irish Water helpline on 1850 278 278 immediately.
Irish Water and Donegal Co Co are working hard to ensure there is as little disruption as possible to tourism, business and normal daily life. Irish Water would like to apologise for any inconvenience caused and would like to thank the public in advance for their co-operation.
Some helpful tips when conserving water are:
Shower instead of using the bath,
Check your toilet cistern is working,
Turn off the tap when brushing your teeth,
Check for leaks in your kitchen,
Use a basin in the sink.