Fish River dosing plant

The recently constructed Potassium Permanganate Dosing Plant at Oberon Pumping Station will reduce manganese levels and discoloured drinking water caused by seasonal changes in raw water from Oberon Dam.

Potassium permanganate is commonly used in water treatment plant processes and will be dosed into the water supply in accordance with current guidelines.

The Duckmaloi Water Filtration Plant already removes some manganese and adding potassium permanganate to the raw water will improve the manganese removal during the water treatment process.

In conjunction with the Potassium Permanganate dosing, WaterNSW will also trial Aluminium Chlorohydrate (ACH) - (another commonly used chemical in water treatment) to check if this further improves drinking water quality supplied to treated water customers. This again will be dosed in line with current Australian Drinking Water guidelines.

The dosing trial is expected to start in January 2025 and the plant will mainly operate during summer and autumn when the manganese levels are higher.