2011 March + 2016/17: Berri (South Australia) – Trihalomethanes, Temperature

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Berri (South Australia)

Breaches to Australian Drinking Water Guidelines Levels Only

9/02/2011 Berri Hepworth St Trihalomethanes – Total 277 ug/L

2/03/2011 Berri Loader St Trihalomethanes – Total 282 ug/L

Trihalomethanes Australian Guideline Level 250μg/L (0.25mg/L)

Why and how are THMs formed?
“When chlorine is added to water with organic material, such as algae, river weeds, and decaying leaves, THMs are formed. Residual chlorine molecules react with this harmless organic material to form a group of chlorinated chemical compounds, THMs. They are tasteless and odourless, but harmful and potentially toxic. The quantity of by-products formed is determined by several factors, such as the amount and type of organic material present in water, temperature, pH, chlorine dosage, contact time available for chlorine, and bromide concentration in the water. The organic matter in water mainly consists of a) humic substance, which is the organic portion of soil that remains after prolonged microbial decomposition formed by the decay of leaves, wood, and other vegetable matter; and b) fulvic acid, which is a water soluble substance of low molecular weight that is derived from humus”. Source: http://water.epa.gov/drink/contaminants/index.cfm

Berri – South Australia – Temperature

November 9 2016: Berri (South Australia) Crawford Tce – Temperature 21C

November 9 2016: Berri (South Australia) Hepworth St – Temperature 21C

November 16 2016: Berri (South Australia) Phillips Rd – Temperature 22C

November 16 2016: Berri (South Australia) Hepworth St – Temperature 21C

November 23 2016: Berri (South Australia) Loader St – Temperature 23C

November 23 2016: Berri (South Australia) Hepworth St – Temperature 23C

November 30 2016: Berri (South Australia) Hepworth St – Temperature 24C

December 7 2016: Berri (South Australia) Crawford Tce – Temperature 24C

December 7 2016: Berri (South Australia) Hepworth St – Temperature 22C

December 14 2016: Berri (South Australia) Phillips Rd – Temperature 26C

December 14 2016: Berri (South Australia) Hepworth St – Temperature 24C

December 21 2016: Berri (South Australia) Loader St – Temperature 23C

December 21 2016: Berri (South Australia) Hepworth St – Temperature 24C

December 29 2016: Berri (South Australia) Hepworth St – Temperature 26C

January 4 2017: Berri (South Australia) Hepworth St – Temperature 26C

January 10 2017: Berri (South Australia) Hepworth St – Temperature 28C

January 11 2017: Berri (South Australia) Crawford Tce – Temperature 28C

January 18 2017: Berri (South Australia) Phillips Rd – Temperature 28C

January 18 2017: Berri (South Australia) Hepworth St – Temperature 27C

January 25 2017: Berri (South Australia) Loader St – Temperature 26C

January 25 2017: Berri (South Australia) Hepworth St – Temperature 27C

February 1 2017: Berri (South Australia) Hepworth St – Temperature 22C

February 8 2017: Berri (South Australia) Crawford Tce – Temperature 25C

February 8 2017: Berri (South Australia) Hepworth St – Temperature 26C

February 15 2017: Berri (South Australia) Phillips Rd – Temperature 28C

February 15 2017: Berri (South Australia) Hepworth St – Temperature 27C

February 22 2017: Berri (South Australia) Loader St – Temperature 25C

February 22 2017: Berri (South Australia) Hepworth St – Temperature 24C

February 28 2017: Berri (South Australia) Hepworth St – Temperature 27C

March 8 2017: Berri (South Australia) Crawford Tce – Temperature 27C

March 8 2017: Berri (South Australia) Hepworth St – Temperature 27C

March 15 2017: Berri (South Australia) Crawford Tce – Temperature 25C

March 15 2017: Berri (South Australia) Hepworth St – Temperature 26C

March 15 2017: Berri (South Australia) Phillips Rd – Temperature 26C

March 22 2017: Berri (South Australia) Loader St – Temperature 26C

March 22 2017: Berri (South Australia) Hepworth St – Temperature 27C

March 29 2017: Berri (South Australia) Hepworth St – Temperature 26C

April 5 2017: Berri (South Australia) Hepworth St – Temperature 23C

April 12 2017: Berri (South Australia) Crawford Tce – Temperature 23C

April 12 2017: Berri (South Australia) Hepworth St – Temperature 22C

April 19 2017: Berri (South Australia) Phillips Rd – Temperature 22C

April 19 2017: Berri (South Australia) Hepworth St – Temperature 21C

April 27 2017: Berri (South Australia) Loader St – Temperature 21C

 

GUIDELINE

“No guideline is set due to the impracticality of controlling water temperature.
Drinking water temperatures above 20°C may result in an increase in the number of
complaints.

Temperature is primarily an aesthetic criterion for drinking water. Generally, cool water is more palatable than warm or cold water. In general, consumers will react to a change in water temperature. Complaints are most frequent when the temperature suddenly increases.

The turbidity and colour of filtered water may be indirectly affected by temperature, as low water temperatures tend to decrease the efficiency of water treatment processes by, for instance, affecting floc formation rates and sedimentation efficiency.

Chemical reaction rates increase with temperature, and this can lead to greater corrosion of pipes and fittings in closed systems. Scale formation in hard waters will also be greater at higher temperatures…

Water temperatures in major Australian reticulated supplies range from 10°C to 30°C. In some long, above-ground pipelines, water temperatures up to 45°C may be experienced…

The effectiveness of chlorine as a disinfectant is influenced by the temperature of the water being dosed. Generally higher temperatures result in more effective disinfection at a particular chlorine dose, but this may be counterbalanced by a more rapid loss of chlorine to the atmosphere (AWWA 1990).