2000/01 & 2011 + 2020: Swan Reach (South Australia) – Trihalomethanes, Antimony

Swan Reach (South Australia) – Trihalomethanes

Breaches to Australian Drinking Water Guidelines Levels Only

14/12/2000 Swan Reach Nildottie Rd Trihalomethanes – Total 322 ug/L

11/01/2001 Swan Reach Nildottie Rd Trihalomethanes – Total 441 ug/L

15/02/2001 Swan Reach Nildottie Rd Trihalomethanes – Total 372 ug/L

15/03/2001 Swan Reach Nildottie Rd Trihalomethanes – Total 288 ug/L

12/04/2001 Swan Reach Nildottie Rd Trihalomethanes – Total 294 ug/L

17/05/2001 Swan Reach Nildottie Rd Trihalomethanes – Total 250 ug/L

10/02/2011 Swan Reach Conners Rd Trihalomethanes – Total 341 ug/L

10/03/2011 Swan Reach Conners Rd Trihalomethanes – Total 253 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: https://water.epa.gov/drink/contaminants/in

Swan Reach (South Australia) – Antimony

12/11/20: Swan Reach (South Australia) Antimony  0.0027mg/L.

Based on health considerations, the concentration of antimony in drinking water should not
exceed the limit of determination of 0.003 mg/L.
Antimony, as the trivalent (Sb(III)) or pentavalent (Sb(V)) salts, has occasionally been detected in
natural source waters. Occurrences are more common in areas near lead or copper smelting operations.
Antimony–tin solder is beginning to replace lead solder and hence exposure to antimony in drinking water may increase in the future.
Antimony alloys and compounds are used in semiconductors, batteries, anti-friction compounds, ammunition, cable sheathing, and flame-proofing compounds. Antimony salts are used in glass, and in the manufacture of ceramics and pottery.
Studies overseas have generally found low concentrations in drinking water, typically less than
0.005 mg/L, but higher concentrations have been reported occasionally.
There are few data available on antimony concentrations in food. The United States Agency for Toxic Substances and Disease Registry has suggested that average daily consumption of antimony in food is about 0.018 mg.