❓ Hon. Norman Moore questions the WA government about the feasibility of using treated wastewater for irrigation and sports grounds, given the large quantities released into the ocean. The response indicates suitability with further treatment, but cost is a barrier due to cheaper groundwater access.
AnsweredQoN 1432Legislative Council
QuestionView source ↗
WASTE WATER TREATMENT PLANTS, WATER USE
(1) How much treated water is pumped into the ocean from each waste water treatment plant in the metropolitan area each year? (2) Is this water suitable for use - (a) on sports grounds - for example, golf courses and ovals; and (b) as horticultural irrigation? (3) If it is suitable, why is it not being used for these purposes? (4) If it is not suitable, what capital expense would be required to enable the treated water to be used for these purposes? Hon N.D. GRIFFITHS
(1) How much treated water is pumped into the ocean from each waste water treatment plant in the metropolitan area each year? (2) Is this water suitable for use - (a) on sports grounds - for example, golf courses and ovals; and (b) as horticultural irrigation? (3) If it is suitable, why is it not being used for these purposes? (4) If it is not suitable, what capital expense would be required to enable the treated water to be used for these purposes? Hon N.D. GRIFFITHS
AnswerView source ↗
I thank the member for some notice of this question. (1) The Water Corporation advises the following annual quantities of treated water are pumped into the ocean: Beenyup, approximately 36 gigalitres a year; Subiaco, approximately 20 gigalitres year; and Woodman Point, approximately 40 gigalitres a year. (2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
(2) Is this water suitable for use - (a) on sports grounds - for example, golf courses and ovals; and (b) as horticultural irrigation? (3) If it is suitable, why is it not being used for these purposes? (4) If it is not suitable, what capital expense would be required to enable the treated water to be used for these purposes? Hon N.D. GRIFFITHS replied: I thank the member for some notice of this question. (1) The Water Corporation advises the following annual quantities of treated water are pumped into the ocean: Beenyup, approximately 36 gigalitres a year; Subiaco, approximately 20 gigalitres year; and Woodman Point, approximately 40 gigalitres a year. (2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
(b) as horticultural irrigation?
(4) If it is not suitable, what capital expense would be required to enable the treated water to be used for these purposes? Hon N.D. GRIFFITHS replied: I thank the member for some notice of this question. (1) The Water Corporation advises the following annual quantities of treated water are pumped into the ocean: Beenyup, approximately 36 gigalitres a year; Subiaco, approximately 20 gigalitres year; and Woodman Point, approximately 40 gigalitres a year. (2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
Hon N.D. GRIFFITHS replied: I thank the member for some notice of this question. (1) The Water Corporation advises the following annual quantities of treated water are pumped into the ocean: Beenyup, approximately 36 gigalitres a year; Subiaco, approximately 20 gigalitres year; and Woodman Point, approximately 40 gigalitres a year. (2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
I thank the member for some notice of this question. (1) The Water Corporation advises the following annual quantities of treated water are pumped into the ocean: Beenyup, approximately 36 gigalitres a year; Subiaco, approximately 20 gigalitres year; and Woodman Point, approximately 40 gigalitres a year. (2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
(1) The Water Corporation advises the following annual quantities of treated water are pumped into the ocean: Beenyup, approximately 36 gigalitres a year; Subiaco, approximately 20 gigalitres year; and Woodman Point, approximately 40 gigalitres a year. (2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
(2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
(4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
(2) Is this water suitable for use - (a) on sports grounds - for example, golf courses and ovals; and (b) as horticultural irrigation? (3) If it is suitable, why is it not being used for these purposes? (4) If it is not suitable, what capital expense would be required to enable the treated water to be used for these purposes? Hon N.D. GRIFFITHS replied: I thank the member for some notice of this question. (1) The Water Corporation advises the following annual quantities of treated water are pumped into the ocean: Beenyup, approximately 36 gigalitres a year; Subiaco, approximately 20 gigalitres year; and Woodman Point, approximately 40 gigalitres a year. (2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
(b) as horticultural irrigation?
(4) If it is not suitable, what capital expense would be required to enable the treated water to be used for these purposes? Hon N.D. GRIFFITHS replied: I thank the member for some notice of this question. (1) The Water Corporation advises the following annual quantities of treated water are pumped into the ocean: Beenyup, approximately 36 gigalitres a year; Subiaco, approximately 20 gigalitres year; and Woodman Point, approximately 40 gigalitres a year. (2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
Hon N.D. GRIFFITHS replied: I thank the member for some notice of this question. (1) The Water Corporation advises the following annual quantities of treated water are pumped into the ocean: Beenyup, approximately 36 gigalitres a year; Subiaco, approximately 20 gigalitres year; and Woodman Point, approximately 40 gigalitres a year. (2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
I thank the member for some notice of this question. (1) The Water Corporation advises the following annual quantities of treated water are pumped into the ocean: Beenyup, approximately 36 gigalitres a year; Subiaco, approximately 20 gigalitres year; and Woodman Point, approximately 40 gigalitres a year. (2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
(1) The Water Corporation advises the following annual quantities of treated water are pumped into the ocean: Beenyup, approximately 36 gigalitres a year; Subiaco, approximately 20 gigalitres year; and Woodman Point, approximately 40 gigalitres a year. (2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
(2) (a) Yes, with disinfection and possibly filtration. (b) Yes, with disinfection and possibly filtration. (3) Local Government, sporting clubs and horticulturalists can currently access and pump ground water at much lower cost than treated waste water. (4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
(4) A 1998 study estimated the capital cost to treat and supply approximately 10 gigalitres a year from the Subiaco waste water treatment plant at $28 million. The capital cost of a proposed reverse osmosis plant to reclaim five gigalitres a year of treated waste water at Kwinana for industrial use is estimated to be $18 million.
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