Some 2325 tonnes of waste have been collected since the Rena ran aground off the Bay of Plenty on 5 October.
Braemar Howells says 1870 tonnes of solid waste have gone to a landfill in Waikato.
Some 117 tonnes of liquid waste and 25 tonnes of milk powder have also been collected.
The company says it has now dealt with more than 120 containers from the ship, but the cleanup operation continues to be a huge job.
