Hunter Water has asked Parliament to allow more time to produce documents that may shed light on plans to build a new dam in the Lower Hunter.
The order also extended to Water NSW, the Department of Planning and Industry and the Office of the Minister for Water.
Twenty-five boxes of documents were delivered within the time frame. Ten of the boxes were available for public scrutiny and 15 were classified as privileged.
Hunter Water said it was unable to provide all of the documents requested due to the "broad scope of the resolution and the significant volume of documents potentially caught by the items".
It has requested an extension until October 12.
"The Parliament has a responsibility to scrutinise government decision making and has the powers to order documents to fulfill its work. The delay by Hunter Water in providing all relevant documents is unacceptable and risks undermining public confidence in the review of the Lower Hunter Water Plan," Mr Field said.
"I am concerned that so many documents have been claimed to be privileged and will be seeking to have many of these documents released to the public to ensure maximum transparency in the review process."
Hunter Water is investigating sites near Grahamstown and Chichester dams as potential sites for a new satellite dam. It has repeatedly said it has not committed to the project.
But two community groups that are opposed to a potential dam said they were concerned the material was not provided within the set timeframe.
"It is important that the water utility keep faith with the Lower Hunter community and oblige by the protocols of Parliament to supply the materials as requested," Limeburners Creek Group spokesman Ken Edwards said
Save Chichester Valley Group spokesman Allan Rumbelsaid Hunter Water's inability to meet the deadline undermined confidence in the community consultation process.
"Hunter Water's efforts would be more convincing if their actions were meeting their obligations to the NSW Parliament," he said.
"It erodes confidence in the community consultation process when their commitment to transparency appears flawed."
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