Soakwell Estimation Calculator for Perth, Western Australia.

How many polypropylene soakwells might you need for a home in the Perth Metropolitan area?

Scroll down to estimate the soakwell volume.

The result of the calculation will be an estimation of how many polypropylene soakwells you might need for your impervious areas (catchment areas).

It will also display the size of the soakwell, the volume provided and an estimate the amount of material left over from the excavation.

Why is the Total Volume Estimated?

Impervious surfaces like your roof and driveway are called catchment areas. Councils typically base soakwell requirements on historical rainfall to ensure proper stormwater drainage, the key factor being total volume provided by the soakwells relative to their catchment area.

Some council's may also have special requirements.

The calculation considers impervious area in m2, local rainfall and duration.