2007/21 – Atitjere/Harts Range (Northern Territory) – Hardness, Total Dissolved Solids

Atitjere/Harts Range (Northern Territory) Hardness

2007/08: Atitjere Hardness 294mg/L

2008/09: Atitjere Hardness 294mg/L

2009/10: Atitjere Hardness 273mg/L

2010/11: Atitjere Hardness 279mg/L

2013/14: Atitjere Hardness 282mg/L

2015/16: Atitijere Hardness 281mg/L

2016/17: Atitijere Hardness 229mg/L

2020/21: Atitjere Hardness: 300mg/L (max), 300mg/L (av.)


“To minimise undesirable build‑up of scale in hot water systems, total hardness (as calcium
carbonate) in drinking water should not exceed 200 mg/L.

Hard water requires more soap than soft water to obtain a lather. It can also cause scale to form on hot water pipes and fittings. Hardness is caused primarily by the presence of calcium and magnesium ions, although other cations such as strontium, iron, manganese and barium can also contribute.”

Atitjere (NT) Total Dissolved Solids

Atitjere (NT) Total Dissolved Solids 700mg/L (max), 700mg/L (av.)


“No specific health guideline value is provided for total dissolved solids (TDS), as there are no
health effects directly attributable to TDS. However for good palatability total dissolved solids
in drinking water should not exceed 600 mg/L.

Total dissolved solids (TDS) consist of inorganic salts and small amounts of organic matter that are dissolved in water. Clay particles, colloidal iron and manganese oxides and silica, fine enough to pass through a 0.45 micron filter membrane can also contribute to total dissolved solids.

Total dissolved solids comprise: sodium, potassium, calcium, magnesium, chloride, sulfate, bicarbonate, carbonate, silica, organic matter, fluoride, iron, manganese, nitrate, nitrite and phosphates…” Australian Drinking Water Guidelines 2011