Whanganui's new $39 million wastewater treatment plant is on track to be operating by June.
The last of the construction work, including mechanical and electrical work, is still being completed but Whanganui District Council infrastructure general manager Mark Hughes said some testing was already under way.
Overall the project was running on time.
"In some areas, we are ahead of time. We have started some testing and pre-commissioning earlier than planned," Mr Hughes said.
"Some of the construction, such as road sealing, is still being completed."
Meanwhile, public consultation on council's proposed trade waste bylaw is under way.
The bylaw will set rules and limits for the use and operation of the plant but not prices for trade waste.
How much industries will pay to discharge waste into the system will be determined as part of council's long term plan next year.
Public consultation on the trade waste bylaw is open till February 23.
The new bylaw needed to be in place by the time the new plant was running.
For more information visit www.whanganui.govt.nz.