The Police Association says we're losing the war on methamphetamine.

Police figures show 889 kg of 'P' was seized last year - more than double the previous year's haul.

Police Association president Chris Cahill told Mike Hosking the problem is only growing, but things are being done.

He said more officers in the districts will help hit gangs selling meth in smaller provincial centres.

"Also we need to continue to work with those overseas partners, especially in China. What's happened now is the demand's actually being driven by massive supply in China.

"That's driving down the price, so we've really got to get in and work well with those partners."

Cahill said international drug dealers target New Zealand because they can make such big profits here.

"We really need to get into that education and that rehabilitation side as well, it's not just a police issue."

LISTEN ABOVE AS POLICE ASSOCIATION PRESIDENT CHRIS CAHILL SPEAKS TO MIKE HOSKING