Omans Public Authority for Electricity and Water (PAEW) has tendered eight operations and maintenance contracts for water networks across the sultanate.
One contract covers the main water transmission system.
Another seven cover above and below ground water assets in the different governorates of Oman.
The deadline for bids is 22 June 2015.
A previous round of five smaller regional operations and maintenance contracts has a 25 May deadline.
The tender comes following major disruptions in water supplies in several areas of Oman following technical problems at Sohar desalination plant, according to local press.
Al-Ghubrah 42 million imperial gallon a day desalination plant commissioning has been delayed until September. This means the water situation is critical as Oman enters the higher demand summer season.
The expected commissioning of Barka desalination plant in the next two months will also ease the water shortage.
PAEW has been forced to use water tankers to supply drinking water over the last two months.