A 4.1-metre saltwater crocodile has been removed from a dam in north Queensland.

The Mackay Regional Council said the croc had been living in its recycled water storage dam at Bakers Creek for the past six years.

It had to be removed after it started displaying territorial behaviour.

The council's parks and environment spokesperson Theresa Morgan said the reptile had started to pose a threat to people.

"The crocodile has wandered between the recycled water storage dam and Bakers Creek for years without concern," Cr Morgan said.

"However, recently it started approaching officers when they visited the storage facility."

Environment and Heritage Protection (EHP) wildlife officers were called in to capture and relocate the croc to the Koorana Crocodile Farm, east of Rockhampton.

They reported it was in a "healthy and strong condition".

"The EHP team harpooned the crocodile and spent considerable time to secure the animal safely and humanely," the council's water and waste services chief operating officer, David Brooker, said.

"Considering this is the first crocodile capture they've conducted in Mackay since the Gooseponds crocodile in 2008, the process went off without a hitch," he said.