❓ A WA parliamentary question on notice regarding the use of chemicals in water treatment from 2001-2004. The response details the chemicals used, their purpose, and explains that usage varies with demand, so there were no exceedances of average monthly quantities.
AnsweredQoN 3057Legislative Assembly
QuestionView source ↗
(b) what are the reasons given for the use of each chemical; (c) for each month of 2001, 2002, 2003 and 2004, to date, what is the average quantity of each of the chemicals used to maintain water quality; (d) on how many occasions were the average monthly quantity figures for the chemicals exceeded; (e) what months were the average monthly quantity figures for the chemicals exceeded; and (f) what were the reasons given for the need to exceed the monthly average chemical usage?
(c) for each month of 2001, 2002, 2003 and 2004, to date, what is the average quantity of each of the chemicals used to maintain water quality; (d) on how many occasions were the average monthly quantity figures for the chemicals exceeded; (e) what months were the average monthly quantity figures for the chemicals exceeded; and (f) what were the reasons given for the need to exceed the monthly average chemical usage?
(d) on how many occasions were the average monthly quantity figures for the chemicals exceeded; (e) what months were the average monthly quantity figures for the chemicals exceeded; and (f) what were the reasons given for the need to exceed the monthly average chemical usage?
(e) what months were the average monthly quantity figures for the chemicals exceeded; and (f) what were the reasons given for the need to exceed the monthly average chemical usage?
(f) what were the reasons given for the need to exceed the monthly average chemical usage?
(b) Calcium Hydroxide ? hardness (calcium and magnesium) removal. Conditioning the water to minimise degradation of the cement lining in water distribution mains. Carbon Dioxide ? Balancing the pH and alkalinity after the addition of lime. Hydrochloric Acid ? Balancing pH. Sulphuric Acid ? Balancing pH. Sodium Hydroxide ? Balancing pH. Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Carbon Dioxide ? Balancing the pH and alkalinity after the addition of lime. Hydrochloric Acid ? Balancing pH. Sulphuric Acid ? Balancing pH. Sodium Hydroxide ? Balancing pH. Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Hydrochloric Acid ? Balancing pH. Sulphuric Acid ? Balancing pH. Sodium Hydroxide ? Balancing pH. Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Sulphuric Acid ? Balancing pH. Sodium Hydroxide ? Balancing pH. Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Sodium Hydroxide ? Balancing pH. Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
(c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
(d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
(e) Not applicable. (f) Not applicable.
(f) Not applicable.
(c) for each month of 2001, 2002, 2003 and 2004, to date, what is the average quantity of each of the chemicals used to maintain water quality; (d) on how many occasions were the average monthly quantity figures for the chemicals exceeded; (e) what months were the average monthly quantity figures for the chemicals exceeded; and (f) what were the reasons given for the need to exceed the monthly average chemical usage?
(d) on how many occasions were the average monthly quantity figures for the chemicals exceeded; (e) what months were the average monthly quantity figures for the chemicals exceeded; and (f) what were the reasons given for the need to exceed the monthly average chemical usage?
(e) what months were the average monthly quantity figures for the chemicals exceeded; and (f) what were the reasons given for the need to exceed the monthly average chemical usage?
(f) what were the reasons given for the need to exceed the monthly average chemical usage?
(b) Calcium Hydroxide ? hardness (calcium and magnesium) removal. Conditioning the water to minimise degradation of the cement lining in water distribution mains. Carbon Dioxide ? Balancing the pH and alkalinity after the addition of lime. Hydrochloric Acid ? Balancing pH. Sulphuric Acid ? Balancing pH. Sodium Hydroxide ? Balancing pH. Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Carbon Dioxide ? Balancing the pH and alkalinity after the addition of lime. Hydrochloric Acid ? Balancing pH. Sulphuric Acid ? Balancing pH. Sodium Hydroxide ? Balancing pH. Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Hydrochloric Acid ? Balancing pH. Sulphuric Acid ? Balancing pH. Sodium Hydroxide ? Balancing pH. Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Sulphuric Acid ? Balancing pH. Sodium Hydroxide ? Balancing pH. Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Sodium Hydroxide ? Balancing pH. Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Aluminium Sulphate ? Coagulating suspended solids and colour to form fine flocs. Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Anionic polyelectrolyte ? Flocculating agent to bind the fine flocs to aid the settling and filtration process. MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
MIEX Resin ? Removing dissolved organic material to improve disinfection efficiency and taste and odour. Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Sodium Chloride ? In conjunction with MIEX resin for removal of dissolved organic material. Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Sodium Hexametaphosphate ? Control of hardness (calcium and magnesium) Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Garnet ? Used to assist hardness removal. Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Chlorine ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Sodium hypochlorite ? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water. Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Aqueous Ammonia ? Disinfection (in combination with chlorine) in extended pipeline supply networks. Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
Fluosilicic Acid ? Addition to treated water for dental health. Only used when stipulated by the Department of Health. (c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
(c) See attached table paper (d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
(d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances. (e) Not applicable. (f) Not applicable.
(e) Not applicable. (f) Not applicable.
(f) Not applicable.
AnswerView source ↗
Answered
14 September 2004
Responded by
Minister representing the Minister for Government Enterprises
Response time
28 days
(a)
Chemical Name
Common Name
Calcium Hydroxide
Lime
Carbon Dioxide
Carbon Dioxide
Hydrochloric Acid
Hydrochloric Acid
Sulphuric Acid
Sulphuric Acid
Sodium Hydroxide
Caustic soda
Aluminium Sulphate
Alum
Anionic plyelectrolyte
Poly
MIEX Resin
MIEX Resin
Sodium Chloride
Salt
Sodium Hexametaphosphate
Calgon
Garnet
Garnet
Chlorine
Chlorine
Sodium hypochlorite
Chlorine
Aqueous Ammonia
Ammonia
Fluosilicic Acid
Fluoride
(b) Calcium Hydroxide
? hardness (calcium and magnesium) removal. Conditioning the water to minimise degradation of the cement lining in water distribution mains.
Carbon Dioxide
? Balancing the pH and alkalinity after the addition of lime.
Hydrochloric Acid
? Balancing pH.
Sulphuric Acid
? Balancing pH.
Sodium Hydroxide
? Balancing pH.
Aluminium Sulphate
? Coagulating suspended solids and colour to form fine flocs.
Anionic polyelectrolyte
? Flocculating agent to bind the fine flocs to aid the settling and filtration process.
MIEX Resin
? Removing dissolved organic material to improve disinfection efficiency and taste and odour.
Sodium Chloride
? In conjunction with MIEX resin for removal of dissolved organic material.
Sodium Hexametaphosphate
? Control of hardness (calcium and magnesium)
Garnet
? Used to assist hardness removal.
Chlorine
? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water.
Sodium hypochlorite
? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water.
Aqueous Ammonia
? Disinfection (in combination with chlorine) in extended pipeline supply networks.
Fluosilicic Acid
? Addition to treated water for dental health. Only used when stipulated by the Department of Health.
(c) See attached table paper
(d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances.
(e) Not applicable.
(f) Not applicable.
Chemical Name
Common Name
Calcium Hydroxide
Lime
Carbon Dioxide
Carbon Dioxide
Hydrochloric Acid
Hydrochloric Acid
Sulphuric Acid
Sulphuric Acid
Sodium Hydroxide
Caustic soda
Aluminium Sulphate
Alum
Anionic plyelectrolyte
Poly
MIEX Resin
MIEX Resin
Sodium Chloride
Salt
Sodium Hexametaphosphate
Calgon
Garnet
Garnet
Chlorine
Chlorine
Sodium hypochlorite
Chlorine
Aqueous Ammonia
Ammonia
Fluosilicic Acid
Fluoride
(b) Calcium Hydroxide
? hardness (calcium and magnesium) removal. Conditioning the water to minimise degradation of the cement lining in water distribution mains.
Carbon Dioxide
? Balancing the pH and alkalinity after the addition of lime.
Hydrochloric Acid
? Balancing pH.
Sulphuric Acid
? Balancing pH.
Sodium Hydroxide
? Balancing pH.
Aluminium Sulphate
? Coagulating suspended solids and colour to form fine flocs.
Anionic polyelectrolyte
? Flocculating agent to bind the fine flocs to aid the settling and filtration process.
MIEX Resin
? Removing dissolved organic material to improve disinfection efficiency and taste and odour.
Sodium Chloride
? In conjunction with MIEX resin for removal of dissolved organic material.
Sodium Hexametaphosphate
? Control of hardness (calcium and magnesium)
Garnet
? Used to assist hardness removal.
Chlorine
? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water.
Sodium hypochlorite
? Oxidation of iron and manganese in the treatment plant, and primary disinfection of treated water.
Aqueous Ammonia
? Disinfection (in combination with chlorine) in extended pipeline supply networks.
Fluosilicic Acid
? Addition to treated water for dental health. Only used when stipulated by the Department of Health.
(c) See attached table paper
(d) The average monthly quantity figures for the chemicals used is dependent upon the water supply customer demand. This determines the quantity and therefore, there were no exceedances.
(e) Not applicable.
(f) Not applicable.
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