2009/17: Hamley Bridge (South Australia) – Trihalomethanes, Temperature

Hamley Bridge (South Australia)

Breaches to Australian Drinking Water Guidelines Levels Only

9/02/2009  Hamley Bridge Makin St Trihalomethanes – Total 250 ug/L

14/12/2009 Hamley Bridge  Makin St Trihalomethanes – Total 255 ug/L

12/01/2010 Hamley Bridge Makin St Trihalomethanes – Total 297 ug/L

8/02/2010  Hamley Bridge  Makin St Trihalomethanes – Total 286 ug/L

18/10/2010  Hamley Bridge  Makin St Trihalomethanes – Total 257 ug/L

15/11/2010  Hamley Bridge Makin St Trihalomethanes – Total 280 ug/L

13/12/2010  Hamley Bridge  Makin St Trihalomethanes – Total 278 ug/L

7/02/2011  Hamley Bridge  Makin St Trihalomethanes – Total 268 ug/L

4/04/2011  Hamley Bridge Makin St Trihalomethanes – Total 272 ug/L

12/12/2011 Hamley Bridge  Makin St Trihalomethanes – Total 267 ug/L

9/01/2012 Hamley Bridge  Makin St Trihalomethanes – Total 276 ug/L

6/02/2012  Hamley Bridge  Makin St Trihalomethanes – Total 322 ug/L

5/03/2012  Hamley Bridge  Makin St Trihalomethanes – Total 290 ug/L

13/03/2012  Hamley Bridge  Makin St Trihalomethanes – Total 329 ug/L

2/04/2012  Hamley Bridge  Makin St Trihalomethanes – Total 277 ug/L

27/08/2012  Hamley Bridge  Makin St Trihalomethanes – Total 253 ug/L

17/12/2012  Hamley Bridge  Makin St Trihalomethanes – Total 261 ug/L

12/03/2013  Hamley Bridge  Makin St Trihalomethanes – Total 251 ug/L

3/10/2013  Hamley Bridge  Makin St Trihalomethanes – Total 254 ug/L

31/10/2013  Hamley Bridge  Makin St Trihalomethanes – Total 266 ug/L

12/6/2014  Hamley Bridge  Makin St Trihalomethanes – Total 262 ug/L

23/12/2015  Hamley Bridge  Makin St Trihalomethanes – Total 294 ug/L

21/1/2016  Hamley Bridge  Makin St Trihalomethanes – Total 266 ug/L

18/2/2016  Hamley Bridge  Makin St Trihalomethanes – Total 291 ug/L

17/3/2016  Hamley Bridge  Makin St Trihalomethanes – Total 337 ug/L

1/4/2016  Hamley Bridge  Makin St Trihalomethanes – Total 303 ug/L

14/4/2016  Hamley Bridge  Makin St Trihalomethanes – Total 277 ug/L

14/4/2016  Hamley Bridge  Makin St Trihalomethanes – Total 291 ug/L

27/4/2016  Hamley Bridge  Makin St Trihalomethanes – Total 284 ug/L

12/5/2016  Hamley Bridge  Makin St Trihalomethanes – Total 263 ug/L

7/6/2016  Hamley Bridge  Makin St Trihalomethanes – Total 266 ug/L

2/8/2016  Hamley Bridge  Makin St Trihalomethanes – Total 267 ug/L

27/9/2016  Hamley Bridge  Makin St Trihalomethanes – Total 251 ug/L

26/10/2016  Hamley Bridge  Makin St Trihalomethanes – Total 268 ug/L

1/11/2016  Hamley Bridge  Makin St Trihalomethanes – Total 273 ug/L

22/11/2016  Hamley Bridge  Makin St Trihalomethanes – Total 295 ug/L

20/12/2016  Hamley Bridge  Makin St Trihalomethanes – Total 273 ug/L

18/1/2017  Hamley Bridge  Makin St Trihalomethanes – Total 331 ug/L

8/2/2017  Hamley Bridge  Makin St Trihalomethanes – Total 282 ug/L

14/2/2017  Hamley Bridge  Makin St Trihalomethanes – Total 274 ug/L

15/3/2017  Hamley Bridge  Makin St Trihalomethanes – Total 276 ug/L

11/4/2017  Hamley Bridge  Makin St Trihalomethanes – Total 261 ug/L

9/5/2017  Hamley Bridge  Makin St Trihalomethanes – Total 258 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

Hamley Bridge – South Australia – Temperature

November 22 2016: Hamley Bridge (South Australia) Makin St – Temperature 22C

November 20 2016: Hamley Bridge (South Australia) Makin St – Temperature 20C

December 6 2016: Hamley Bridge (South Australia) Makin St – Temperature 23C

December 13 2016: Hamley Bridge (South Australia) Makin St – Temperature 24C

December 20 2016: Hamley Bridge (South Australia) Makin St – Temperature 24C

December 29 2016: Hamley Bridge (South Australia) Makin St – Temperature 25C

January 4 2017: Hamley Bridge (South Australia) Makin St – Temperature 24C

January 10 2017: Hamley Bridge (South Australia) Makin St – Temperature 27C

January 18 2017: Hamley Bridge (South Australia) Makin St – Temperature 25C

January 24 2017: Hamley Bridge (South Australia) Makin St – Temperature 27C

January 31 2017: Hamley Bridge (South Australia) Makin St – Temperature 26C

February 8 2017: Hamley Bridge (South Australia) Makin St – Temperature 25C

February 14 2017: Hamley Bridge (South Australia) Makin St – Temperature 24C

February 21 2017: Hamley Bridge (South Australia) Makin St – Temperature 24C

February 28 2017: Hamley Bridge (South Australia) Makin St – Temperature 25C

March 7 2017: Hamley Bridge (South Australia) Makin St – Temperature 26C

March 15 2017: Hamley Bridge (South Australia) Makin St – Temperature 25C

March 21 2017: Hamley Bridge (South Australia) Makin St – Temperature 25C

March 28 2017: Hamley Bridge (South Australia) Makin St – Temperature 24C

April 4 2017: Hamley Bridge (South Australia) Makin St – Temperature 21C

April 11 2017: Hamley Bridge (South Australia) Makin St – Temperature 20C

April 19 2017: Hamley Bridge (South Australia) Makin 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).