Davenport (South Australia) – Monochloramines
July 2012 – 2 April 2013: Davenport (South Australia) Monochloramines 3.01mg/L (average level) 7/10 samples >3mg/L
2 June 2014 – 7 September 2015: Davenport (South Australia) Monochloramines 2.88mg/L (average level) 10/16 samples >3mg/L
According to the ADWG: “Based on health considerations, the concentration of monochloramine in drinking water should not exceed 3mg/L (equivalent to 4.1mg Cl as C12/L).
Some water supplies may also be disinfected through a process called Chloramination where ammonia is added to the water prior to the chlorine, which in turn can create Monochloramines. Sunlight does not degrade Monochloramines to the same extent as chlorine, meaning that water can be stored for longer periods of time.
Between January 2000 and July 2012, SA Water recorded over 50 incidences of Monochloramines breaching or the same as the 2011 ADWG.