Plumbing and Drainage Act 2018

The owner of premises must ensure kitchen greywater from plumbing or drainage on the premises is discharged into—

for premises in a sewered area—

the sewerage system for the area; or

if the premises have a holding tank for the storage of the greywater installed under a permit and the period stated in the permit has not ended—the holding tank; or

for premises not in a sewered area—

a greywater use facility that includes a greywater treatment plant; or

an on-site sewage facility; or

an environmentally relevant on-site sewage facility.

If the premises are not in a sewered area, the owner of the premises must ensure—

the greywater does not cause an odour that unreasonably interferes, or is likely to unreasonably interfere, with the use or enjoyment of other premises; and

any ponding or run-off of the greywater does not cause a danger or health risk to anyone; and

any ponding or run-off of the greywater is contained—

if there is a land application area for the greywater—on the land application area; or

otherwise—on the premises.