2008/12 + 2015/16: Emu Bay (South Australia) – Trihalomethanes

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Emu Bay (South Australia)

Breaches to Australian Drinking Water Guidelines Levels Only

7/01/2008 Emu Bay   North Coast Rd Trihalomethanes – Total 288 ug/L

21/01/2008  Emu Bay  North Coast Rd Trihalomethanes – Total 275 ug/L

4/02/2008 Emu Bay  North Coast Rd Trihalomethanes – Total 320 ug/L

18/02/2008 Emu Bay North Coast Rd Trihalomethanes – Total 317 ug/L

4/03/2008 Emu Bay North Coast Rd Trihalomethanes – Total 301 ug/L

31/03/2008 Emu Bay North Coast Rd Trihalomethanes – Total 307 ug/L

14/04/2008 Emu Bay North Coast Rd Trihalomethanes – Total 307 ug/L

28/04/2008 Emu Bay North Coast Rd Trihalomethanes – Total 288 ug/L

12/05/2008 Emu Bay North Coast Rd Trihalomethanes – Total 298 ug/L

26/05/2008 Emu Bay North Coast Rd Trihalomethanes – Total 296 ug/L

8/07/2008 Emu Bay North Coast Rd Trihalomethanes – Total 294 ug/L

22/07/2008 Emu Bay North Coast Rd Trihalomethanes – Total 272 ug/L

3/02/2009 Emu Bay North Coast Rd Trihalomethanes – Total 280 ug/L

17/02/2009 Emu Bay North Coast Rd Trihalomethanes – Total 315 ug/L

3/03/2009 Emu Bay North Coast Rd Trihalomethanes – Total 292 ug/L

16/03/2009 Emu Bay North Coast Rd Trihalomethanes – Total 303 ug/L

30/03/2009 Emu Bay North Coast Rd Trihalomethanes – Total 316 ug/L

14/04/2009 Emu Bay North Coast Rd Trihalomethanes – Total 268 ug/L

27/04/2009 Emu Bay North Coast Rd Trihalomethanes – Total 276 ug/L

11/05/2009 Emu Bay North Coast Rd Trihalomethanes – Total 259 ug/L

25/05/2009 Emu Bay North Coast Rd Trihalomethanes – Total 275 ug/L

9/11/2009 Emu Bay North Coast Rd Trihalomethanes – Total 253 ug/L

7/12/2009 Emu Bay North Coast Rd Trihalomethanes – Total 295 ug/L

21/12/2009 Emu Bay North Coast Rd Trihalomethanes – Total 298 ug/L

4/01/2010 Emu Bay North Coast Rd Trihalomethanes – Total 315 ug/L

15/02/2010 Emu Bay North Coast Rd Trihalomethanes – Total 367 ug/L

1/03/2010 Emu Bay North Coast Rd Trihalomethanes – Total 298 ug/L

15/03/2010 Emu Bay North Coast Rd Trihalomethanes – Total 299 ug/L

12/04/2010 Emu Bay North Coast Rd Trihalomethanes – Total 312 ug/L

27/04/2010 Emu Bay North Coast Rd Trihalomethanes – Total 306 ug/L

17/01/2011 Emu Bay North Coast Rd Trihalomethanes – Total 250 ug/L

31/01/2011 Emu Bay North Coast Rd Trihalomethanes – Total 325 ug/L

14/02/2011 Emu Bay North Coast Rd Trihalomethanes – Total 319 ug/L

26/03/2012 Emu Bay CTNorth Coast Rd Trihalomethanes – Total 326 ug/L

23/05/2015 Emu Bay CTNorth Coast Rd Trihalomethanes – Total 253 ug/L

18/01/2016 Emu Bay CTNorth Coast Rd Trihalomethanes – Total 260 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