Calculator

Grey water usage calculator – Whole of house

3 Bedroom house with 4 occupants
Average daily grey water usage = 100L per person per day
Average weekly grey water usage = 2800L

Dispersal area required for sandy soil environments at a rate of 35mm of irrigation per week = 80m2

4 Bedroom house with 5 occupants
Average daily grey water usage = 100L per person per day
Average weekly grey water usage = 3500L

Dispersal area required for sandy soil environments at a rate of 35mm of irrigation per week = 100m2

Note: these numbers are determined by the health department and must be complied with; they do not take into account if there are less people in the house.

Grey water usage calculator – Laundry Connection
2 Bedroom house with 3 occupants
Average daily grey water usage = 40L per person per day
Average weekly grey water usage = 840L

Dispersal area required for sandy soil environments at a rate of 35mm of irrigation per week = 24m2
3 Bedroom house with 4 occupants
Average daily grey water usage = 40L per person per day
Average weekly grey water usage = 1120L

Dispersal area required for sandy soil environments at a rate of 35mm of irrigation per week = 32m2

Note: these numbers are determined by the health department and must be complied with; they do not take into account if there are less people in the house.

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