Several cases were still open with the possibility of more serious enforcement action pending, Mr Metcalf said.
A total of 22 enforceable undertakings and one improvement notice had been handed out during the blitz.
Dairy NZ people team leader Jan Muir said a lack of knowledge about required obligations might have contributed to the high level of non-compliance.
"Many farmers grew up with seasonal averaging and not keeping timesheets. But now the industry needs to understand seasonal averaging is not acceptable and that timesheets need to be kept because the nature of dairy farming is different hours depending on the season and the weather to name just two. Once people start keeping timesheets, they usually find the process comes with a lot of benefits as it creates good conversations between employer and employee."
Dairy NZ was trying to promote dairy farming as a great industry to work in for all people on the farm and progress was being made, she said.
"We need to change with the times and this means creating jobs with excellent work and life balance where people are paid fair wages for doing an effective job. Putting in place good farm systems can help people reduce the number of hours worked for the same outcome."
Dairy NZ strategy and investment leader for people and business Mark Paine said the dairy industry agreed the situation was critical and needed addressing. It was holding a joint expo at its forum today in Hamilton with MBIE and Federated Farmers to discuss the issue.
The workshop was designed to clarify what farmers need to be doing as an employer and why, in relation to hot topics such as timesheets, minimum wage and health and safety.
There were also resources and support available for farmers through Dairy NZ's website, Federated Farmers, IRD and MBIE.