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Water treatment

Water treatment

Our treatment plants filter and disinfect water, so that when it comes out of your tap, it’s safe and healthy to drink.

We operate 21 water treatment plants across north-east Victoria, supplying drinking water to over 100,000 people.

Our water treatment processes are determined by a range of factors including:

  • the type of catchment
  • the chemistry and microbial quality of the water
  • mandatory requirements, such as disinfection and fluoridation.

How we treat water

Coagulation and Flocculation

This is the process where dispersed insoluble particles in raw water come out of solution to form larger particles known as floc.

Clarification

This process removes particles from raw water. This may be via sedimentation assisted by gravity, or dissolves air flotation whereby tiny air bubbles separate the particles.

Filtration

This process utilises granular media filters to remove the particles, or floc resulting in clear water.

Disinfection

Disinfection removes, deactivates or kills microorganisms in the water. This typically involves dosing chlorine or ultraviolet irradiation.

Fluoride

Fluoride is added at the direction of the Department of Health and Human Services for oral health.

How your town’s water is treated

Different supply systems have different treatment requirements. The type of treatment provided to our various supply sources are described below.

System Source Treatment process
BEECHWORTH NINE MILE CREEK/ FRENCHMANS CREEK COAGULATION AND FLOCCULATION,  DISSOLVED AIR FLOTATION, FILTRATION, DISINFECTION (CHLORINE)
BELLBRIDGE MURRAY RIVER/ LAKE HUME COAGULATION AND FLOCCULATION, SEDIMENTATION/CLARIFICATION, FILTRATION, DISINFECTION (CHLORINE)
BENALLA RYANS CREEK/ WHISKEY CREEK COAGULATION AND FLOCCULATION,  DISSOLVED AIR FLOTATION, FILTRATION, DISINFECTION (CHLORINE), FLUORIDE
BRIGHT
(POREPUNKAH/ WANDILIGONG)
OVENS RIVER COAGULATION AND FLOCCULATION,  DISSOLVED AIR FLOTATION, FILTRATION, DISINFECTION (CHLORINE)
CORRYONG
(CUDGEWA)
NARIEL CREEK COAGULATION AND FLOCCULATION,  DISSOLVED AIR FLOTATION, FILTRATION, DISINFECTION (CHLORINE)
DARTMOUTH LAKE TABOR/ MITTA MITTA RIVER COAGULATION AND FLOCCULATION,  FILTRATION, DISINFECTION (CHLORINE)
ESKDALE MITTA MITTA RIVER COAGULATION AND FLOCCULATION,  FILTRATION, DISINFECTION (CHLORINE)
HARRIETVILLE OVENS RIVER COAGULATION AND FLOCCULATION,  FILTRATION, DISINFECTION (CHLORINE)
MOYHU KING RIVER COAGULATION AND FLOCCULATION,  FILTRATION, DISINFECTION (ULTRAVIOLET AND CHLORINE)
MT BEAUTY
(TAWONGA/ TAWONGA SOUTH)
WEST KIEWA RIVER/ SIMMONDS CREEK COAGULATION AND FLOCCULATION,  DISSOLVED AIR FLOTATION, FILTRATION, DISINFECTION (CHLORINE)
MYRTLEFORD BUFFALO CREEK COAGULATION AND FLOCCULATION,  DISSOLVED AIR FLOTATION, FILTRATION, DISINFECTION (CHLORINE)
OXLEY KING RIVER COAGULATION AND FLOCCULATION,  FILTRATION, DISINFECTION (ULTRAVIOLET AND CHLORINE)
WAHGUNYAH
(RUTHERGLEN)
MURRAY RIVER COAGULATION AND FLOCCULATION,  DISSOLVED AIR FLOTATION, FILTRATION, DISINFECTION (ULTRAVIOLET AND CHLORINE)
TALLANGATTA MITTA MITTA RIVER/ LAKE HUME COAGULATION AND FLOCCULATION,  DISSOLVED AIR FLOTATION, FILTRATION, DISINFECTION (CHLORINE)
WALWA MURRAY RIVER COAGULATION AND FLOCCULATION,  FILTRATION, DISINFECTION (ULTRAVIOLET AND CHLORINE)
WANGARATTA
(GLENROWAN)
OVENS RIVER/ GROUNDWATER BORES COAGULATION AND FLOCCULATION,  FILTRATION, SEDIMENTATION/CLARIFICATION, DISINFECTION (ULTRAVIOLET AND CHLORINE), FLUORIDE
WHITFIELD KING RIVER COAGULATION AND FLOCCULATION,  DISSOLVED AIR FLOTATION, FILTRATION, DISINFECTION (ULTRAVIOLET AND CHLORINE)
WODONGA
(BARANDUDA/ KIEWA/ TANGAMBALANGA/ BARNAWARTHA/ CHILTERN/ SPRINGHURST)
WODONGA CREEK (ANABRANCH OF MURRAY RIVER) COAGULATION AND FLOCCULATION,  DISSOLVED AIR FLOTATION, FILTRATION, DISINFECTION (CHLORINE), FLUORIDE
YACKANDANDAH NINE MILE CREEK COAGULATION AND FLOCCULATION, SEDIMENTATION/CLARIFICATION, FILTRATION, DISINFECTION (CHLORINE)
YARRAWONGA
(BUNDALONG/ ST JAMES/ DEVENISH/ TUNGAMAH/ GOORAMBAT)
MURRAY RIVER (LAKE MULWALA) COAGULATION AND FLOCCULATION,  DISSOLVED AIR FLOTATION, FILTRATION, DISINFECTION (CHLORINE), FLUORIDE