2009/17: Hindmarsh Island (South Australia) – Trihalomethanes, Choral Hydrate

Center map
Traffic
Bicycling
Transit

Hindmarsh Island (South Australia)

Breaches to Australian Drinking Water Guidelines Levels Only

12/02/2009 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 290 ug/L

7/06/2007 Hindmarsh Valley   Nettle Hill Rd Trihalomethanes – Total 273 ug/L

4/06/2009 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 316 ug/L

22/10/2009 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 250 ug/L

17/12/2009 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 269 ug/L

14/01/2010 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 294 ug/L

11/02/2010 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 279 ug/L

11/03/2010 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 283 ug/L

8/04/2010 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 311 ug/L

6/05/2010 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 266 ug/L

3/06/2010 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 263 ug/L

29/07/2010 Hindmarsh Island Wentworth Pde Trihalomethanes – Total 250 ug/L

24/09/2010 Hindmarsh Island Wentworth Pde Trihalomethanes – Total 263 ug/L

19/10/2010 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 257 ug/L

18/11/2010 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 254 ug/L

16/12/2010 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 299 ug/L

13/01/2011 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 284 ug/L

10/02/2011 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 285 ug/L

10/03/2011 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 353 ug/L

5/05/2011 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 322 ug/L

2/06/2011 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 288 ug/L

25/08/2011 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 250 ug/L

12/01/2012 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 307 ug/L

9/02/2012 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 281 ug/L

8/03/2012 Hindmarsh Island Wentworth Pde Trihalomethanes – Total 281 ug/L

5/04/2012 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 264 ug/L

3/05/2012 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 285 ug/L

23/01/2014 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 260 ug/L

20/02/2014 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 278 ug/L

18/03/2014 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 264 ug/L

21/12/2015 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 267 ug/L

18/03/2016 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 261 ug/L

24/11/2016 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 256 ug/L

19/1/2017 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 279 ug/L

23/2/2017 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 274 ug/L

16/3/2017 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 291 ug/L

13/4/2017 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 321 ug/L

12/5/2017 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 285 ug/L

8/6/2017 Hindmarsh Island  Wentworth Pde Trihalomethanes – Total 275 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

Hindmarsh Island (South Australia) – Chloral Hydrate

30/7/09 Hindmarsh Island  Chloral Hydrate 23.1ug/L

27/8/09 Hindmarsh Island  Chloral Hydrate 26.9ug/L

24/9/09 Hindmarsh Island  Chloral Hydrate 21.1ug/L

22/10/09 Hindmarsh Island  Chloral Hydrate 28.9ug/L

19/11/09 Hindmarsh Island  Chloral Hydrate 22.9ug/L

17/12/09 Hindmarsh Island  Chloral Hydrate 20.8ug/L

14/1/10 Hindmarsh Island  Chloral Hydrate 30.8ug/L

11/2/10 Hindmarsh Island  Chloral Hydrate 23.1ug/L

11/3/10 Hindmarsh Island  Chloral Hydrate 24ug/L

3/6/10 Hindmarsh Island  Chloral Hydrate 22.4ug/L

1/7/10 Hindmarsh Island  Chloral Hydrate 24.5ug/L

29/7/10 Hindmarsh Island  Chloral Hydrate 23.4ug/L

26/8/10 Hindmarsh Island  Chloral Hydrate 23.7ug/L

24/9/10 Hindmarsh Island  Chloral Hydrate 25.4ug/L

19/10/10 Hindmarsh Island  Chloral Hydrate 25.4ug/L

18/11/10 Hindmarsh Island  Chloral Hydrate 26.2ug/L

13/1/11 Hindmarsh Island  Chloral Hydrate 27.7ug/L

5/5/11 Hindmarsh Island  Chloral Hydrate 20ug/L

Chloral hydrate is a disinfection by-product, arising from chlorination of water containing naturally occurring organic material (NOM). Chloral hydrate is a sedative and hypnotic drug. Long-term use of chloral hydrate is associated with a rapid development of tolerance to its effects and possible addiction as well as adverse effects including rashes, gastric
discomfort and severe renal, cardiac and hepatic failure.

2004 Australian Drinking Water Guideline: Trichloroacetaldehyde (chloral hydrate): 0.02mg/L

2011 Australian Drinking Water Guideline: Trichloroacetaldehyde (chloral hydrate): 0.1mg/L

Based on health considerations, the concentration of chloral hydrate in drinking water
should not exceed 0.1 mg/L. Action to reduce chloral hydrate is encouraged, but must not compromise disinfection, as non-disinfected water poses significantly greater risk than chloral hydrate. (2011 ADWG)