Australian Drinking Water Map

New Norfolk  (Tasmania) – Chloroketones 

17/7/24: New Norfolk (Tasmania): 1,1,1-trichloropropanone 2.3ug/L

Data are inadequate to set guideline values for chloroketones in drinking water. GENERAL DESCRIPTION The chloroketones are produced in drinking water as by-products of the reaction between naturally occurring organic matter and chlorine. No data are available on other sources or uses for these compounds. Concentrations of chloroketones in drinking water reported overseas are very low and are estimated at less than 0.01 mg/L.

TYPICAL VALUES IN AUSTRALIAN DRINKING WATER In major Australian reticulated supplies 1,1,1-trichloropropanone has been recorded in concentrations up to 0.02 mg/L, but it is usually below the limit of determination of 0.0005 mg/L. No data are available for other chloroketones.

LIMITING FORMATION IN DRINKING WATER The presence of chloroketones in drinking water can be minimised by removing naturally occurring organic matter from the source water, by reducing the amount of chlorine added, or by the use of alternative disinfectants.” 2011 ADWG

2017 + 2024 – New Norfolk (Tasmania) – Mercury, Chloroketones

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New Norfolk (Tasmania) – Mercury – [Australian Record?] May 4 2017 – New Norfolk (Tasmania) George St – Mercury 0.00482mg/L Metal exceedance occurred on 4/05/2017 at New Norfolk/George St. An investigation of the catchment, treatment chemicals, network, sampling process and laboratory testing revealed no obvious source of the contamination. System was flushed and resampled with all results within ADWG limits. 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. https://ntn.org.au/wp-content/uploads/2010/05/mercury_brief20101.pdf New Norfolk  (Tasmania) – Chloroketones  17/7/24: New Norfolk (Tasmania): 1,1,1-trichloropropanone 2.3ug/L Data are inadequate to set guideline values for chloroketones in drinking water. GENERAL DESCRIPTION The chloroketones are produced in drinking water as by-products of the reaction between naturally occurring organic matter and chlorine. No data are available on other sources or uses for these compounds. Concentrations of chloroketones in drinking water reported overseas are very low and are estimated at less than 0.01 mg/L. TYPICAL VALUES IN AUSTRALIAN DRINKING WATER In major Australian reticulated supplies 1,1,1-trichloropropanone has been recorded in concentrations up to 0.02 mg/L, but it is usually below the limit of determination of 0.0005 mg/L. No data are available for other chloroketones. LIMITING FORMATION IN DRINKING WATER The presence of chloroketones in drinking water can be minimised by removing naturally occurring organic matter from the source water, by reducing the amount of chlorine added, or by the use of alternative disinfectants.” 2011 ADWG