New data shows police response times around the country have become remarkably slower under the Labour-led Government.

The stats, obtained by National, show response times to serious crime have blown out in many districts since 2017.

In Auckland, officers arrived in 26 minutes or less 90% of the time in 2017. That time has now jumped out to one hour and 49 minutes this year.

In Northland, the figure has jumped from 31 minutes to one hour and 18 minutes, while in Waikato it's risen from 16 minutes to the best part of an hour.

It was no better in Bay of Plenty, where it has risen from 19 minutes to over 52.

Police Association president Chris Cahill said the data left him "concerned" and he believed the public would also be concerned.

But Police Minister Poto Williams told 1News she wasn't sure what was going on and had no plans to find out.

Williams said she was "not over the detail" despite 1News having sent the details to her office, and described it as an "operational matter to the police".

"I think the questions need to go to the police," she told 1News when questioned about the long response times.

National Party leader Christopher Luxon described Williams as someone "at sea in her portfolio".

"What's really sad here is we're seeing police response times to serious crime doubling. In Auckland it's up 320%."

The stats, obtained by National, show response times to serious crime have blown out in many districts since 2017.

In Auckland, officers arrived in 26 minutes or less 90% of the time in 2017. That time has now jumped out to one hour and 49 minutes this year.

In Northland, the figure has jumped from 31 minutes to one hour and 18 minutes, while in Waikato it's risen from 16 minutes to the best part of an hour.

It was no better in Bay of Plenty, where it has risen from 19 minutes to over 52.

Police Association president Chris Cahill said the data left him "concerned" and he believed the public would also be concerned.

But Police Minister Poto Williams told 1News she wasn't sure what was going on and had no plans to find out.

Williams said she was "not over the detail" despite 1News having sent the details to her office, and described it as an "operational matter to the police".

"I think the questions need to go to the police," she told 1News when questioned about the long response times.

National Party leader Christopher Luxon described Williams as someone "at sea in her portfolio".

"What's really sad here is we're seeing police response times to serious crime doubling. In Auckland it's up 320%."