Whanganui’s new wastewater treatment plant.

The Chronicle was given a tour on Whanganui’s new wastewater treatment plant. Construction began on the facility last year and is expected to be complete by December. Photos Bevan Conley

The plant's new anaerobic pond holds 57 million litres.

Image 1 of 13: The plant's new anaerobic pond holds 57 million litres.