Ledge Point – Western Australia – Hardness
2007/08: Ledge Point (Western Australia) – Hardness 286mg/L (Highest Detection Only)
2008/09: Ledge Point (Western Australia) – Hardness 267mg/L (max), 264mg/L (mean)
2010/11 Ledge Point (Western Australia) Hardness 260mg/L (max), 250mg/L (mean)
2011/12 Ledge Point (Western Australia) Hardness 260mg/L (max), 255mg/L (mean)
2013/14 Ledge Point (Western Australia) Hardness 270mg/L (max), 263mg/L (mean)
2014/15 Ledge Point (Western Australia) Hardness 260mg/L (max), 256mg/L (mean)
2015/16 Ledge Point (Western Australia) Hardness 260mg/L (max), 260mg/L (mean)
2016/17 Ledge Point (Western Australia) Hardness 270mg/L (max), 260mg/L (mean)
2017/18 Ledge Point (Western Australia) Hardness 270mg/L (max), 260mg/L (mean)
2018/19: Ledge Point (Western Australia) Hardness 260mg/L (max), 255mg/L (mean)
2019/20: Ledge Point (Western Australia) Hardness 270mg/L (max), 255mg/L (mean)
2019/20: Ledge Point (Western Australia) Hardness 260mg/L (max), 257mg/L (mean)
GUIDELINE
“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.”
Australian Drinking Water Guidelines 2011
Ledge Point – Western Australia – Total Dissolved Solids
2008/09: Ledge Point (Western Australia) – Total Dissolved Solids 723mg/L (max), 715mg/L (mean)
2009/10: Ledge Point (Western Australia) – Total Dissolved Solids 713mg/L (max)
2010/11 Ledge Point (Western Australia) Total Dissolved Solids 695mg/L (max), 695mg/L (av)
2011/12 Ledge Point (Western Australia) Total Dissolved Solids 702mg/L (max), 688mg/L (av)
2013/14 Ledge Point (Western Australia) Total Dissolved Solids 720mg/L (max), 710mg/L (av)
2014/15 Ledge Point (Western Australia) Total Dissolved Solids 707mg/L (max), 702mg/L (mean)
2015/16 Ledge Point (Western Australia) Total Dissolved Solids 711mg/L (max), 701mg/L (mean)
2016/17 Ledge Point (Western Australia) Total Dissolved Solids 705mg/L (max), 695mg/L (mean)
2017/18 Ledge Point (Western Australia) Total Dissolved Solids 712mg/L (max), 698mg/L (mean)
2018/19: Ledge Point (Western Australia) Total Dissolved Solids 699mg/L (max), 691mg/L (mean)
2019/20: Ledge Point (Western Australia) Total Dissolved Solids 719mg/L (max), 704mg/L (mean)
2022/23: Ledge Point (Western Australia) Total Dissolved Solids 685mg/L (max), 679mg/L (mean)
GUIDELINE
“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