Irish Water has appealed to people in Kerry to reduce water usage right across the county.
It says demand for drinking water has increased very significantly in many supplies across Kerry.
At the same time, due to the dry weather and high temperatures, water source levels are dropping.
Irish Water says that together with Kerry County Council, it is working hard to maintain supplies.
Anna Brosnan, Irish Water's Operations Lead for Kerry says the current extra demand, combined with reduced capacity, is not sustainable across Kerry.
She said they are appealing to everyone to be mindful of this and reduce water consumption as much as possible.
All supplies across the county are seeing increased demand and night time restrictions may be necessary in some areas between 11pm and 6am.
Ms Brosnan said households, farms and businesses served by public water supplies across Kerry are asked to reduce water usage as much as possible.
Particular schemes under the most pressure at present include the Mid Kerry Scheme, Central Regional Scheme (in particular the Gneeveguilla area), Listowel and certain areas in North Kerry, Lauragh, Cahersiveen, Portmagee, Maulin, Caherdaniel, Castlecove, Castlegregory and Inch.
Guidance and tips for conserving water is available on www.water.ie