Harvested stormwater beneficial uses
Link to this table

Beneficial Uses Stormwater from rooftops only (rainwater) Stormwater
Health Criteria Level Expected level of effort Health Criteria Level Expected level of effort
Outdoor Sanitary sewer flushing Limited human exposure at point of use and limited exposure to pathogens upstream of point of use No treatment needed Limited human exposure at point of use and limited exposure to pathogens upstream of point of use Minimal (pretreatment)
Irrigation – low exposure risk Limited human exposure at point of use and limited exposure to pathogens upstream of point of use. Minimal (pretreatment)1 Limited human exposure at point of use and limited exposure to pathogens upstream of point of use.1 Medium (pretreatment + disinfection OR pretreatment + treatment)
Irrigation – high exposure risk Limited human contact and controlled access at point of use.1 Medium (pretreatment + disinfection OR pretreatment + treatment) Limited human contact and controlled access at point of use.1 High (pretreatment + treatment + disinfection)
Vehicle/building washing Limited human contact and controlled access at point of use.1 Medium (pretreatment + disinfection OR pretreatment + treatment) Limited human contact and controlled access at point of use.1 Medium (pretreatment + disinfection OR pretreatment + treatment)
Fire fighting Limited human contact and controlled access at point of use.1 Minimal (pretreatment) Limited human contact and controlled access at point of use.1 Medium (pretreatment + disinfection OR pretreatment + treatment)
Water features (uncontrolled access) Limited human contact and controlled access at point of use. Medium (pretreatment + disinfection OR pretreatment + treatment) Limited human contact and controlled access at point of use. Medium (pretreatment + disinfection OR pretreatment + treatment)
Street cleaning/ dust control Limited human contact and controlled access at point of use.1 Medium (pretreatment + disinfection OR pretreatment + treatment) Limited human contact and controlled access at point of use.1 Medium (pretreatment + disinfection OR pretreatment + treatment)
Indoor Fire suppression Limited human contact and controlled access at point of use. Medium (pretreatment + disinfection OR pretreatment + treatment) Limited human contact and controlled access at point of use. Medium (pretreatment + disinfection OR pretreatment + treatment)
Cooling Limited human contact and controlled access at point of use.1 Medium (pretreatment + disinfection OR pretreatment + treatment) Limited human contact and controlled access at point of use.1 High (pretreatment + treatment + disinfection)
Process /Boiler Water Limited human contact and controlled access at point of use.1 Medium (pretreatment + disinfection OR pretreatment + treatment) Limited human contact and controlled access at point of use.1 High (pretreatment + treatment + disinfection)
Flushing Uncontrolled access at point of use1 Medium (pretreatment + disinfection OR pretreatment + treatment) Uncontrolled access at point of use1 High (pretreatment + treatment + disinfection)
Washing Uncontrolled access at point of use Medium (pretreatment + disinfection OR pretreatment + treatment) Uncontrolled access at point of use1 High (pretreatment + treatment + disinfection)
Drinking water Drinking water standards Drinking water standards Drinking water standards Drinking water standards

1A higher level of treatment that may be required depending on context
Note: In practice, all indoor non potable uses are typically treated to water quality requirements in code and currently require disinfection.

This page was last modified on 4 October 2016, at 13:26.

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