Night-time water restrictions will be in force on the Tully/Tullycross supply tonight.
Uisce Éireann says they are necessary to maintain a daytime supply for the community.
Reservoir levels have fallen due to a drop in the raw water quality entering the local treatment plant.
The restrictions will be in place from 10.30 tonight to 8 tomorrow morning to allow the reservoir levels recharge.
Water levels are being reviewed daily and a decision whether further restrictions are required will be made tomorrow.
The water authority is appealing to householders and business owners to conserve water.