❓ A WA parliamentary question seeks information on water supply development, fluoride levels in bores, and the installation of a defluoridation plant in Dunsborough. The answer provides details on costs, fluoride concentrations, and operational procedures.
AnsweredQoN 1440Legislative Assembly
QuestionView source ↗
(1) Over the past five years, how much money has been spent by the Water Corporation on developing water supplies for Dunsborough, in particular, how much money has been spent drilling for water and developing bores?
(2) What is the content of naturally occurring fluorine/fluoride within each of the various bores from which the Water Corporation extracts water for supply to Dunsborough and what is the average fluorine/fluoride content (prior to treatment) of this water?
(3) Has a fluorine/fluoride removal plant recently been installed at Dunsborough and, if yes, what was the total cost of this plant and what is its annual operating cost?
(2) What is the content of naturally occurring fluorine/fluoride within each of the various bores from which the Water Corporation extracts water for supply to Dunsborough and what is the average fluorine/fluoride content (prior to treatment) of this water?
(3) Has a fluorine/fluoride removal plant recently been installed at Dunsborough and, if yes, what was the total cost of this plant and what is its annual operating cost?
AnswerView source ↗
Answered
3 June 2003
Responded by
Minister representing the Minister for Government Enterprises
Response time
28 days
(1) Over the past five years the Water Corporation has spent approximately $12.3 million on the Dunsborough water supply scheme. This includes $6.67 million for the construction of new bores and collector main. Purchase of water from Busselton Water Board (BWB) was considered as an alternative source option but was not pursued because of the following issues: * Limited installed distribution capacity to meet future growth; * Major expenditure would be required for a new major distribution main for source to the Dunsborough Scheme; * This option could not be delivered in a suitable timeframe to meet Dunsborough water supply growth. (2) Fluoride levels of individual bores are: Bore 1/86: 0.45 - 0.65mg/L Bore 1/91: 0.2mg/L Bore 1/93: 0.35 - 0.6mg/L Bore 2/96: 0.65 - 0.75mg/L Bore 2/98: 0.25 - 0.45mg/L Bore 1/92: 2.2 - 2.5mg/L Bore 1/98: 1.2 - 1.3mg/L Bore 3/98: 2.3 - 2.6mg/L Bore 4/98: 2.4 - 4.1mg/L The average fluoride concentration prior to treatment for the 2001/02 year was approximately 1.05mg/L. The defluoridation plant is only used when combined fluoride levels are above the operational target range, being between 0.7 and 1mg/L. Normal operation is to shandy bores to meet this range. The health guideline is 1.5mg/L. (3) A defluoridation plant has been installed at Dunsborough at a cost of $1.595 million. The annual operating costs are approximately $21,000 per annum.
Purchase of water from Busselton Water Board (BWB) was considered as an alternative source option but was not pursued because of the following issues: * Limited installed distribution capacity to meet future growth; * Major expenditure would be required for a new major distribution main for source to the Dunsborough Scheme; * This option could not be delivered in a suitable timeframe to meet Dunsborough water supply growth. (2) Fluoride levels of individual bores are: Bore 1/86: 0.45 - 0.65mg/L Bore 1/91: 0.2mg/L Bore 1/93: 0.35 - 0.6mg/L Bore 2/96: 0.65 - 0.75mg/L Bore 2/98: 0.25 - 0.45mg/L Bore 1/92: 2.2 - 2.5mg/L Bore 1/98: 1.2 - 1.3mg/L Bore 3/98: 2.3 - 2.6mg/L Bore 4/98: 2.4 - 4.1mg/L The average fluoride concentration prior to treatment for the 2001/02 year was approximately 1.05mg/L. The defluoridation plant is only used when combined fluoride levels are above the operational target range, being between 0.7 and 1mg/L. Normal operation is to shandy bores to meet this range. The health guideline is 1.5mg/L. (3) A defluoridation plant has been installed at Dunsborough at a cost of $1.595 million. The annual operating costs are approximately $21,000 per annum.
(2) Fluoride levels of individual bores are: Bore 1/86: 0.45 - 0.65mg/L Bore 1/91: 0.2mg/L Bore 1/93: 0.35 - 0.6mg/L Bore 2/96: 0.65 - 0.75mg/L Bore 2/98: 0.25 - 0.45mg/L Bore 1/92: 2.2 - 2.5mg/L Bore 1/98: 1.2 - 1.3mg/L Bore 3/98: 2.3 - 2.6mg/L Bore 4/98: 2.4 - 4.1mg/L The average fluoride concentration prior to treatment for the 2001/02 year was approximately 1.05mg/L. The defluoridation plant is only used when combined fluoride levels are above the operational target range, being between 0.7 and 1mg/L. Normal operation is to shandy bores to meet this range. The health guideline is 1.5mg/L. (3) A defluoridation plant has been installed at Dunsborough at a cost of $1.595 million. The annual operating costs are approximately $21,000 per annum.
Bore 1/86: 0.45 - 0.65mg/L Bore 1/91: 0.2mg/L Bore 1/93: 0.35 - 0.6mg/L Bore 2/96: 0.65 - 0.75mg/L Bore 2/98: 0.25 - 0.45mg/L Bore 1/92: 2.2 - 2.5mg/L Bore 1/98: 1.2 - 1.3mg/L Bore 3/98: 2.3 - 2.6mg/L Bore 4/98: 2.4 - 4.1mg/L The average fluoride concentration prior to treatment for the 2001/02 year was approximately 1.05mg/L. The defluoridation plant is only used when combined fluoride levels are above the operational target range, being between 0.7 and 1mg/L. Normal operation is to shandy bores to meet this range. The health guideline is 1.5mg/L. (3) A defluoridation plant has been installed at Dunsborough at a cost of $1.595 million. The annual operating costs are approximately $21,000 per annum.
The average fluoride concentration prior to treatment for the 2001/02 year was approximately 1.05mg/L. The defluoridation plant is only used when combined fluoride levels are above the operational target range, being between 0.7 and 1mg/L. Normal operation is to shandy bores to meet this range. The health guideline is 1.5mg/L. (3) A defluoridation plant has been installed at Dunsborough at a cost of $1.595 million. The annual operating costs are approximately $21,000 per annum.
(3) A defluoridation plant has been installed at Dunsborough at a cost of $1.595 million. The annual operating costs are approximately $21,000 per annum.
Purchase of water from Busselton Water Board (BWB) was considered as an alternative source option but was not pursued because of the following issues: * Limited installed distribution capacity to meet future growth; * Major expenditure would be required for a new major distribution main for source to the Dunsborough Scheme; * This option could not be delivered in a suitable timeframe to meet Dunsborough water supply growth. (2) Fluoride levels of individual bores are: Bore 1/86: 0.45 - 0.65mg/L Bore 1/91: 0.2mg/L Bore 1/93: 0.35 - 0.6mg/L Bore 2/96: 0.65 - 0.75mg/L Bore 2/98: 0.25 - 0.45mg/L Bore 1/92: 2.2 - 2.5mg/L Bore 1/98: 1.2 - 1.3mg/L Bore 3/98: 2.3 - 2.6mg/L Bore 4/98: 2.4 - 4.1mg/L The average fluoride concentration prior to treatment for the 2001/02 year was approximately 1.05mg/L. The defluoridation plant is only used when combined fluoride levels are above the operational target range, being between 0.7 and 1mg/L. Normal operation is to shandy bores to meet this range. The health guideline is 1.5mg/L. (3) A defluoridation plant has been installed at Dunsborough at a cost of $1.595 million. The annual operating costs are approximately $21,000 per annum.
(2) Fluoride levels of individual bores are: Bore 1/86: 0.45 - 0.65mg/L Bore 1/91: 0.2mg/L Bore 1/93: 0.35 - 0.6mg/L Bore 2/96: 0.65 - 0.75mg/L Bore 2/98: 0.25 - 0.45mg/L Bore 1/92: 2.2 - 2.5mg/L Bore 1/98: 1.2 - 1.3mg/L Bore 3/98: 2.3 - 2.6mg/L Bore 4/98: 2.4 - 4.1mg/L The average fluoride concentration prior to treatment for the 2001/02 year was approximately 1.05mg/L. The defluoridation plant is only used when combined fluoride levels are above the operational target range, being between 0.7 and 1mg/L. Normal operation is to shandy bores to meet this range. The health guideline is 1.5mg/L. (3) A defluoridation plant has been installed at Dunsborough at a cost of $1.595 million. The annual operating costs are approximately $21,000 per annum.
Bore 1/86: 0.45 - 0.65mg/L Bore 1/91: 0.2mg/L Bore 1/93: 0.35 - 0.6mg/L Bore 2/96: 0.65 - 0.75mg/L Bore 2/98: 0.25 - 0.45mg/L Bore 1/92: 2.2 - 2.5mg/L Bore 1/98: 1.2 - 1.3mg/L Bore 3/98: 2.3 - 2.6mg/L Bore 4/98: 2.4 - 4.1mg/L The average fluoride concentration prior to treatment for the 2001/02 year was approximately 1.05mg/L. The defluoridation plant is only used when combined fluoride levels are above the operational target range, being between 0.7 and 1mg/L. Normal operation is to shandy bores to meet this range. The health guideline is 1.5mg/L. (3) A defluoridation plant has been installed at Dunsborough at a cost of $1.595 million. The annual operating costs are approximately $21,000 per annum.
The average fluoride concentration prior to treatment for the 2001/02 year was approximately 1.05mg/L. The defluoridation plant is only used when combined fluoride levels are above the operational target range, being between 0.7 and 1mg/L. Normal operation is to shandy bores to meet this range. The health guideline is 1.5mg/L. (3) A defluoridation plant has been installed at Dunsborough at a cost of $1.595 million. The annual operating costs are approximately $21,000 per annum.
(3) A defluoridation plant has been installed at Dunsborough at a cost of $1.595 million. The annual operating costs are approximately $21,000 per annum.
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