Water treatment plants

At Hunter Water, we ensure we meet the required drinking water guidelines by following a careful treatment process at our water treatment plants (also known as water filtration plants).

Here is a list of our plants that are currently in operation:

Grahamstown Water Treatment Plant

Grahamstown Water Treatment Plant can treat water from Grahamstown Dam and/or Tomago Sandbeds. The plant has a peak supply capacity of 257 megalitres per day, making it our largest water treatment plant.

Grahamstown Water Treatment plant uses conventional treatment through the following processes:

  • coagulation/flocculation
  • sedimentation
  • filtration
  • pH correction
  • disinfection
  • fluoridation.

Dungog Water Treatment Plant

Dungog Water Treatment Plant treats water from Chichester Dam and has a peak supply capacity of 90 megalitres per day.

The treatment plant uses direct filtration, and includes the following processes:

  • coagulation/flocculation
  • contact filtration
  • pH correction
  • disinfection
  • fluoridation.

Lemon Tree Passage Water Treatment Plant

Lemon Tree Passage Water Treatment Plant treats water from the north-eastern end of the Tomago Sandbeds and provides a peak supply capacity of 5 megalitres per day.

The treatment plant uses two-stage filtration, and includes the following processes:

  • aeration
  • coagulation/flocculation
  • two stage filtration
  • pH correction
  • disinfection
  • fluoridation.

Anna Bay Water Treatment Plant

Anna Bay Water Treatment Plant treats water from the Anna Bay Sandbeds and provides a peak supply capacity of 12 megalitres per day.

The treatment plant uses the following processes:

  • aeration
  • pH correction
  • disinfection
  • fluoridation.

Nelson Bay Water Treatment Plant

Nelson Bay Water Treatment Plant treats water from the Anna Bay Sandbeds and provides a peak supply capacity of 12 megalitres per day.

The treatment plant uses the following processes:

  • aeration
  • pH correction
  • disinfection
  • fluoridation.

Gresford Water Treatment Plant

Gresford Water Treatment Plant can treat water from the Allyn or Paterson Rivers. The plant has a peak supply capacity of 0.6 megalitres per day.

The treatment plant uses the following processes:

  • microfiltration
  • disinfection.

Water treatment processes

Water is essential for our region to function. And because we want to create the most optimal supply possible, we have extensive processes in place to treat it. Learn more about the steps involved in our water treatment processes and find out how we produce high-quality drinking water.

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