The water treatment plant was built in 2005 to supplement the supply to Greytown from the Waiohine treatment plant. It has a design capacity of up to 2.7 million litres daily (ML/d), but typically treats around 1.5 ML/d on average.

The plant treats the water using UV disinfection, pH correction and chlorination and supplies directly into the network for Greytown only.

Supply from Memorial Park currently accounts for around 34 percent of South Wairarapa’s total water supply volume in a typical year.