2001/2 + 2011/14 +2017: Ceduna (South Australia) – Trihalomethanes

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Ceduna (South Australia) – Trihalomethanes

South Australia THM’s Highest readings 2000-2012: Ceduna 0.996mg/L (19/2/01), Ceduna 0.994mg/L (19/3/01)

17/01/2001 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 346 ug/L

19/02/2001 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 996 ug/L

19/03/2001 Ceduna  Murat Tce (SAW Depot) Trihalomethanes – Total 994 ug/L

17/04/2001 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 541 ug/L

22/05/2001 Ceduna  Murat Tce (SAW Depot) Trihalomethanes – Total 319 ug/L

21/01/2002  Ceduna  Murat Tce (SAW Depot) Trihalomethanes – Total 688 ug/L

25/03/2002 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 529 ug/L

22/04/2002  Ceduna  Murat Tce (SAW Depot) Trihalomethanes – Total 516 ug/L

28/05/2002  Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 329 ug/L

2/07/2002  Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 299 ug/L

7/03/2011 Ceduna  Murat Tce (SAW Depot) Trihalomethanes – Total 293 ug/L

4/04/2011  Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 252 ug/L

11/01/2012 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 250 ug/L

7/01/2013 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 254 ug/L

5/02/2013 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 253 ug/L

30/04/2013 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 278 ug/L

31/07/2013 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 262 ug/L

22/10/2013 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 265 ug/L

11/2/2014 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 281 ug/L

10/1/2017 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 291 ug/L

7/2/2017 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 350 ug/L

28/2/2017 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 330 ug/L

7/3/2017 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 296 ug/L

14/3/2017 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 270 ug/L

4/4/2017 Ceduna Murat Tce (SAW Depot) Trihalomethanes – Total 253 ug/L

Australian Drinking Water Guideline Level (Trihalomethanes) 0.250mg/L (250ug/L) (US Guideline 0.08mg/L)

Classical trihalomethanes consist of chloroform (CHCl3), dichlorobromoform (CHCl2Br),
dibromochloroform (CHBr2Cl) and bromoform (CHBr3).

“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 odorless, but harmful and potentially toxic. The quantity of byproducts 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”.