Only approved wastewater systems can be used in WA. Premises owners who install an unapproved system contravene the Health (treatment of Sewage and Disposal of Effluent and Liquid Waste) Regulations 1974.

Lists of approved wastewater systems in WA:

• Aerobic treatment units (PDF 121KB)
• Alternative leach drains (PDF 170KB)
• Alternative toilets (PDF 134KB)
• Greywater systems (PDF 108KB)
• Leach drains – concrete (PDF 202KB)
• Leach drains – plastic (PDF 113KB)
• Sand and textile filter systems (PDF 171KB)
• Septic tanks – concrete (PDF 170KB)
• Septic tanks – plastic (PDF 66KB)
• Soakwells (PDF 92KB)
• Temporary toilets (PDF 64KB)
• Wastewater Dosing Systems (PDF 49KB)
• Worm based sewage systems (PDF 51KB)

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