2010/14 + 2016/17: Paringa (South Australia) – Trihalomethanes

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Paringa (South Australia) – Trihalomethanes

Breaches to Australian Drinking Water Guidelines Levels Only

13/04/2010 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 297 ug/L

26/10/2010 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 319 ug/L

21/12/2010 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 294 ug/L

18/01/2011 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 457 ug/L

15/02/2011 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 406 ug/L

15/03/2011 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 435 ug/L

22/11/2011 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 287 ug/L

20/12/2011 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 286 ug/L

14/02/2012 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 280 ug/L

13/03/2012 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 368 ug/L

22/01/2013 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 251 ug/L

25/02/2014 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 278 ug/L

1/11/2016 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 256 ug/L

29/11/2016 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 340 ug/L

21/2/2017 Paringa Lindsay Point Rd (outside Council Depot) Trihalomethanes – Total 255 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/in