Dumped rubbish is threatening the Hauraki Gulf but "people power" is helping to clean up the mess.
The Watercare Harbour Clean-up Trust employs contractors and operates a purpose-built boat - the Phil Warren II - with a captain and full-time crew.
"But the job is too big for us," points out the Watercare Services operations manager for wastewater, Mark Bourne.
"We depend on volunteers; they are folk who love their harbour and don't want to see it trashed."
The trust co-ordinates voluntary groups, advising on locations to clean up, times, tides and safety.