2007/12: Brownlow (South Australia) – Trihalomethanes

Brownlow (South Australia)

Breaches to Australian Drinking Water Guidelines Levels Only

17/12/2007  Brownlow Lot 50 Parade Trihalomethanes – Total 266 ug/L

2/01/2008  Brownlow Lot 50 Parade Trihalomethanes – Total 288 ug/L

14/01/2008  Brownlow Lot 50 Parade Trihalomethanes – Total 278 ug/L

29/01/2008 Brownlow  Lot 50 Parade Trihalomethanes – Total 293 ug/L

11/02/2008  Brownlow  Lot 50 Parade Trihalomethanes – Total 307 ug/L

26/02/2008  Brownlow  Lot 50 Parade Trihalomethanes – Total 343 ug/L

10/03/2008  Brownlow Lot 50 Parade Trihalomethanes – Total 321 ug/L

25/03/2008  Brownlow  Lot 50 Parade Trihalomethanes – Total 297 ug/L

8/04/2008  Brownlow  Lot 50 Parade Trihalomethanes – Total 284 ug/L

21/04/2008  Brownlow  Lot 50 Parade Trihalomethanes – Total 306 ug/L

5/05/2008 Brownlow Lot 50 Parade Trihalomethanes – Total 294 ug/L

20/05/2008  Brownlow  Lot 50 Parade Trihalomethanes – Total 274 ug/L

3/06/2008  Brownlow  Lot 50 Parade Trihalomethanes – Total 311 ug/L

16/06/2008  Brownlow  Lot 50 Parade Trihalomethanes – Total 281 ug/L

1/07/2008  Brownlow Lot 50 Parade Trihalomethanes – Total 288 ug/L

15/07/2008  Brownlow  Lot 50 Parade Trihalomethanes – Total 268 ug/L

29/07/2008 Brownlow Lot 50 Parade Trihalomethanes – Total 327 ug/L

9/02/2009  Brownlow  Lot 50 Parade Trihalomethanes – Total 297 ug/L

10/03/2009  Brownlow  Lot 50 Parade Trihalomethanes – Total 345 ug/L

23/03/2009  Brownlow  Lot 50 Parade Trihalomethanes – Total 251 ug/L

6/04/2009  Brownlow  Lot 50 Parade Trihalomethanes – Total 260 ug/L

12/01/2010  Brownlow Lot 50 Parade Trihalomethanes – Total 261 ug/L

25/01/2010 1 Brownlow Lot 50 Parade Trihalomethanes – Total 303 ug/L

8/02/2010  Brownlow Lot 50 Parade Trihalomethanes – Total 291 ug/L

23/02/2010  Brownlow  Lot 50 Parade Trihalomethanes – Total 301 ug/L

9/03/2010  Brownlow  Lot 50 Parade Trihalomethanes – Total 286 ug/L

22/03/2010 Brownlow  Lot 50 Parade Trihalomethanes – Total 289 ug/L

6/04/2010 Brownlow  Lot 50 Parade Trihalomethanes – Total 295 ug/L

17/05/2010  Brownlow  Lot 50 Parade Trihalomethanes – Total 268 ug/L

7/02/2011  Brownlow  Lot 50 Parade Trihalomethanes – Total 302 ug/L

21/02/2011 Brownlow  Lot 50 Parade Trihalomethanes – Total 365 ug/L

7/03/2011  Brownlow  Lot 50 Parade Trihalomethanes – Total 345 ug/L

17/10/2011 Brownlow  Lot 50 Parade Trihalomethanes – Total 274 ug/L

9/01/2012  Brownlow Lot 50 Parade Trihalomethanes – Total 253 ug/L

23/01/2012  Brownlow  Lot 50 Parade Trihalomethanes – Total 264 ug/L

6/02/2012  Brownlow  Lot 50 Parade Trihalomethanes – Total 294 ug/L

20/02/2012  Brownlow  Lot 50 Parade Trihalomethanes – Total 262 ug/L

19/03/2012  Brownlow Lot 50 Parade Trihalomethanes – Total 294 ug/L

2/04/2012  Brownlow  Lot 50 Parade Trihalomethanes – Total 251 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