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

  • Underway

  • Lowe Rd
  • Mudamuckla
  • 15/11/2018
  • Water Supply On
  • 15/11/2018 02:59 PM - We are attending to an incident in Mudamuckla with no interruption to the water supply. The safety of our crews and customers comes first, and we always aim to minimise inconvenience by restoring services as quickly as we can. Reference Number WO: 06626064.
  • See all major faults

  • Scheduled works

  • Underway
  • King St
  • Norwood
  • 18/11/2018
  • Temporary Supply Interruption
  • Estimated start time and water supply off: 22/11/2018 09:00 AM
    Estimated restore time and water supply back on: 22/11/2018 06:00 PM

    We’re improving your services and undertaking maintenance work in Norwood. Sometimes our crews need to temporarily interrupt the water supply to our customers and/or manage traffic while they are working. Temporary traffic management may remain in place until reinstatement of the impacted road is complete. We always aim to minimise inconvenience by restoring services as safely and quickly as we can.


  • See all scheduled works

Follow Us On