Goldenfields Water County Council released a statement advising customers that the fault on one of their major pumps and the "unprecedented" demand during the ongoing emergency situation in southern NSW, the water restrictions were in place immediately for customers located on the Oura Water Supply Scheme as of January 5.

This includes Junee, Temora, Marrar, West Wyalong, Ungarie, Ariah Park, Barmedman, Ardlethan and Barellan.

"Goldenfields Water would like to assure all customers that there is sufficient supplies of water available to meet community, rural and emergency needs in support of the current emergency operations however restrictions are required to preserve operational infrastructure until repairs can be effected at the Oura plant," the statement read.

"Goldenfields Water staff are working around the clock to repair the restriction of pumping capacity to meet the extreme demand, however we request that all customers please adhere to the restrictions being imposed to ensure that supply is maintained for critical needs during this time," the statement said.

Under the Local Government Act 1993, the maximum penalty that may be applied for a breach of imposed water restrictions is $2,200 for corporations and $220 for individuals, according to Goldenfields Water.

"Notice is hereby given under Regulation 137 of the Local Government (General) Regulation 2005, which permits the use of water to be restricted if there is a shortage of supply," it said.

"This notice shall take effect immediately from 5 January 2020 and will remain in effect until varied by further notice.

"Goldenfields Water wishes to apologise for any inconvenience and thank everyone for their patience during this period of restriction."