Nickel
- 2019 March: Spinebill Drive, Greenbank (Queensland). Nickel
- 2007/12 + 2019 – Tenterfield (New South Wales) – E.coli, Iron, Nickel, Colour, Turbidity
- 1997-99 + 2012/21: Iwantja/Indulkana (South Australia) – Total Dissolved Solids, Iron, Radionuclides, Lead, Nickel, Chloride, Iron, Sodium, Sulphate, Total Dissolved Solids, Hardness
- 2008/11 + 2015/16 – Maldon (Victoria) – E.coli, Nickel, Turbidity
- 2016 – Epsom-Huntly (Victoria) – Nickel
- 2010/11 + 2018/21 – Bendigo (Southern) (Victoria) – E.coli, Nickel, Turbidity
- 2007/8 + 2016/20 – Bendigo – Spring Gully (Victoria) – E.coli, Lead, Nickel
- 2017 August + 2020/21: – Katamatite (Victoria) – Trihalomethanes, Nickel
- 2005/06 + 2017/18 – Kyneton (Victoria) – Nickel, Total Dissolved Solids, Turbidity
- 2005/14 + 2018 – Tooborac (Victoria) – E.coli, Trichloroacetic Acid, Dichloroacetic Acid, Trihalomethanes, Lead, Hardness, Total Dissolved Solids, Colour, Iron, Turbidity, Nickel
- 2015 – Clarence Colliery (New South Wales) – Salinity, Nickel, Zinc, pH, Temperature
- 2008 – Sampleton (sic) (New South Wales) – Nickel
- 2017 October – Wingecarribee River (New South Wales) – Zinc, Nickel, Manganese
- 2009 + 2017/2020 – Lithgow (New South Wales) – Colour, Iron, Manganese, Turbidity, Nickel, Lead, Aluminium
- 2017/21 – Mendooran (New South Wales) – Nickel, Hardness, Iron, Manganese, Chloride, Inadequate Chlorine
- 2014 March – Coral Cove (Queensland) – Lead, Nickel
- 2016/17 – Hodgson Vale/Vale View (Queensland) – Nickel
- 2005/12 + 2016/20 – Castlemaine (Victoria) – E.coli, Nickel, Turbidity
- 2005/06 +2012 + 2016/17 – Echuca (Victoria) – E.coli, Anabaena Circinalis, Aluminium, Total Dissolved Solids, Taste, Nickel
- 2012 May – Pakenham – MacDonalds Drain Road (Victoria) – Nickel
- 2005/17 + 2022: Goornong (Victoria) – E.coli, Trihalomethanes, Aluminium, Nickel, Hardness, Total Dissolved Solids, Chlorine, Chloride, Taste & Odour
- 2007/12 + 2020: Boort (Victoria) – E.coli, Trihalomethanes, Iron, Turbidity, Total Dissolved Solids, Hardness, Chloride, Nickel, Chlorine
- 2006/2020: Esperance (Western Australia). Lead & Nickel in Rainwater Tanks, PFAS, Hardness, Total Dissolved Solids, Silica, Chloride
- 2007 & 2011: Cowirra-Neeta (South Australia). Trihalomethanes, Nickel
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