Water harvesting and use system matrix

Water harvesting and use system matrix
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Beneficial Uses		Stormwater from rooftops only (rainwater)		Stormwater
		Health criteria Level	Level of effort1	Health criteria Level	Level of effort1
		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
Irrigation – low exposure risk	Limited human exposure at point of use and limited exposure to pathogens upstream of point of use		Minimal	Limited human exposure at point of use and limited exposure to pathogens upstream of point of use	Minimal to Medium
Irrigation – high exposure risk	Limited human contact and controlled access at point of use		Minimal to Medium	Limited human contact and controlled access at point of use	Medium to High
Vehicle/building washing	Limited human contact and controlled access at point of use		Minimal to Medium	Limited human contact and controlled access at point of use	Minimal to Medium
Fire fighting	Limited human exposure at point of use and limited exposure to pathogens upstream of point of use		Minimal	Limited human exposure at point of use and limited exposure to pathogens upstream of point of use	Minimal to Medium
Water features (uncontrolled access)	Limited human contact and controlled access at point of use		Medium	Limited human contact and controlled access at point of use	Medium
Street cleaning/ dust control	Limited human contact and controlled access at point of use		Minimal to Medium	Limited human contact and controlled access at point of use	Minimal to Medium
Indoor	Fire supression	Limited human contact and controlled access at point of use	Medium	Limited human contact and controlled access at point of use	Medium
	Cooling	Limited human contact and controlled access at point of use	Minimal to Medium	Limited human contact and controlled access at point of use	Minimal to High
	Process /Boiler Water	Limited human contact and controlled access at point of use	Minimal to Medium	Limited human contact and controlled access at point of use	Minimal to High
	Flushing	Uncontrolled access at point of use	Minimal to Medium	Uncontrolled access at point of use	Medium to High
	Washing	Uncontrolled access at point of use	Medium	Uncontrolled access at point of use	Medium to High
	Drinking water	Drinking water standards	Drinking water standards	Drinking water standards	Drinking water standards

¹Minimal - pretreatment; Medium - pretreatment + disinfection OR pretreatment + treatment; High - pretreatment + treatment + disinfection