The water treatment plant was built in 2018. The plant has a design capacity of up to 5.2 million litres daily (ML/d), but typically treats around 2.2 ML/d on average.
The plant treats the water using UV disinfection, pH correction and chlorination before storage in a timber tank onsite and subsequent supply to Featherston and Greytown. There is also a reservoir for Greytown near the Waiohine plant and additional treated water storage is in the construction stage. When supply from the treatment plant is less than demand, the bore located in Memorial Park supplements the water supply for Greytown.
Supply from the Waiohine plant currently accounts for around 38 percent of South Wairarapa’s total water supply volume in a typical year.
Timber storage tank