Primary school principals are doubling down on their call for a better pay offer.

Principals belonging to the NZEI union have rejected the Government's latest collective agreement offer, including a 4.6% pay rise.

They say it's substantially inferior to the deal accepted by secondary school principals.

Principal Karl Vasau, the principal for Rowandale Primary School, told Andrew Dickens they're working hard to get huge changes implemented quickly, and they want acknowledgement.

He says they're drawing a line in the sand.

The Public Service Commissioner says he's disappointed the offer hasn't been accepted.

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Swings and roundabouts for the dairy sector, with prices set to weaken.

Research by Rabobank suggests overall global production peaked last quarter, and this quarter won't be far behind.

EU and UK are seeing their strongest growth since 2017 and US milk output has increased for five consecutive months.

Lincoln University Adjunct Professor Jacqueline Rowarth told Andrew Dickens dairy farmers aren't feeling too glum, coming off good margins.

She says they feel good when people want their product, and that joy's clearly spreading to other countries.

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Costs to fix our water infrastructure are increasing, as we got a better picture of its current state.

Every council has now submitted their plan under the Government's Local Water Done Well programme.

As Newstalk ZB first revealed last week, the final bill is expected to be almost 48 billion dollars - about nine billion more than first thought.

Water New Zealand Chief Executive Gillian Blythe told Andrew Dickens with all the plans submitted, we've now got a better picture of water infrastructure than we ever have before.

She says it's like when you look at your own house and realise you've got to spend some money fixing a roof or painting a window.

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