Hunter Water will invest $1.1-billion into a 10-year infrastructure program in the Hunter.
The investment is set to support the increase in the region’s population to one million by 2050.
Minister for Primary Industries, Lands and Water Niall Blair said the Hunter needs the upgrade.
“From Medowie to Maitland and the Upper Hunter water infrastructure will be upgraded – the likes of which has never been seen before,” he said.
Hunter Water will spend $40-million on the Grahamstown Water Treatment Plant.
$48-million will be invested in expanding the Farley Wastewater Treatment Works in Maitland.
Another $15-million will be spent as part of the Dungog Wastewater Treatment Works expansion.