2017 – Kilkenny (South Australia) – Mercury, Trihalomethanes

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Kilkenny (South Australia) – Mercury

June 19 2017 – Kilkenny (South Australia) – Mercury 0.00138mg/L

Mercury: Australian Drinking Water  Guideline 0.001mg/L

Mercury, if it enters the ecosystem can transform into the more toxic methylmercury where it can bioaccumulate. Methylmercury is highly toxic to human embryos, fetuses, infants and children. Mercury has numerous sources including old gold mines, where mercury was used in gold recovery process. It has been estimated that 950 tonnes of
mercury was deposited into Victorian soil, rivers and streams during the various gold rushes.
http://ntn.org.au/wp-content/uploads/2010/05/mercury_brief20101.pdf

Kilkenny (South Australia) – Trihalomethanes

Breaches to Australian Drinking Water Guidelines Levels Only

27/2/2017 Kilkenny Yallum Tce Trihalomethanes – Total 273 ug/L

27/3/2017 Kilkenny Yallum Tce Trihalomethanes – Total 264 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