Fish River dosing plant
Potassium permanganate
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Reminder note for raw (untreated) water customers only:
Water supplied by the Fish River pipeline is not intended for drinking, cooking, washing clothes etc. This water is still safe for stock and flushing toilets. If you have any concerns, WaterNSW recommends that you contact the Nepean Blue Mountains Local Health Department on (02) 4734 2000 or by email for any further advice.
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 Spring 2024 and the plant will mainly operate during summer and autumn when the manganese levels are higher.
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