Managing our water supplies

Managing our water supplies

We use our Drinking Water Quality Management System (DWQMS) to manage South Australian’s drinking water supply systems and to deliver safe drinking water to our customers.

A key principle of this approach is having barriers and preventive measures in place to reduce hazards along the chain from the catchment to the customer’s tap. The focus is on preventing and minimising hazards at the earliest point in the water quality management process and not relying solely on downstream controls. Hazards in the water can take many forms and are generally categorised into three types – biological, physical or chemical. Typical hazards found in South Australia for each of these categories include:

  • Biological – algal metabolites’ by-products and pathogens (e.g. Cryptosporidium, Giardia, E. coli)
  • Physical – sediments (turbidity) and colour
  • Chemical – pesticides, hydrocarbons, iron and manganese.

We have identified potential water quality hazards and the associated level of risk for each of our water supply systems using our water quality risk management framework. Hazards identified during this process are incorporated into our corporate management platform SAAM (Safe, Actioned, Assured, Managed).  SAAM is used to capture, assess, prioritise, manage and report water quality hazards and actions. It is also used for planning our water quality improvements (including operational and capital improvements) and identifying changes or improvements in monitoring, procedures, training and quality verification. This risk assessment process is integrated with other business areas of SA Water.

The following table shows the barriers, water quality management objectives and preventative measures from catchment to tap.

BarrierWater quality management objectivePossible hazards
Catchment

Minimise introduction of hazards into source water

~ Pathogens

~ Pesticides

~ Hydrocarbons

~ Iron and manganese

~ Sediments

~ Nutrients

~ Dissolved organic carbon

Reservoir
Minimise introduction of hazards and remove some hazards

~ Pathogens

~ Pesticides

~ Hydrocarbons

~ Iron and manganese

~ Algal by-products including taste and odour compounds

Treatment

Remove most hazards

~ Iron and manganese

~ Chemicals

~ Algal by-products including taste and odour compounds

~ Pathogens

Disinfection

Neutralise microbiological hazards and algal by-products

~ Algal by-products

~ Pathogens

Chlorine Residual Maintenance

Manage microbiological hazards throughout systems

~ Pathogens

Closed System

Prevent introduction of hazards

~ Pathogens

~ Chemicals

Backflow Prevention

Prevent introduction of hazards

~ Pathogens

~ Chemicals

  • Major faults

  • Reported

  • HMAS Australia Road
  • Henley Beach South
  • 18/12/2017
  • Water Off
  • 18/12/2017 3:26 PM - We are on-site responding to an incident in Henley Beach South. Our crews may remain on site to perform further work. Traffic restrictions may also apply. Reference Number WO:06151098

  • See all major faults

  • Scheduled works

  • Underway
  • Port Rd
  • Woodville
  • 18/12/2017
  • Supply Interruption
  • Estimated start time (water off): 20/12/2017 10:00 AM
    Estimated restore time (water back on): 20/12/2017 02:00 PM

    We’re committed to improving your services and are undertaking maintenance work in Woodville. Water supply in the surrounding area may be impacted during the above times. Traffic restrictions may also apply.


  • See all scheduled works