Approved secondary treatment systems and aerated wastewater treatment systems

Secondary treatment systems(STS) are wastewater treatment systems which produce treated effluent of secondary standard, i.e. 20 mg/L of Biochemical Oxygen Demand (BOD), 30 mg/L of Total suspended solids (TSS) and 10 cfu/100 mL of Escherichia (E) coli. Due to the treatment and disinfection process, the treated wastewater from STS systems may be used for garden irrigation.

The STSs systems listed below have been certified to the latest Australian Standard AS 1546.3:2017- On-site domestic wastewater treatment units.Secondary treatment systems and approved by the Chief Health Officer for installations in Western Australia.  AS 1546.3:2017 sets out requirements for the design, commissioning, performance and conformity testing of secondary treatment systems.

Aerated Wastewater Treatment System (AWTS) is a system which uses the processes of aeration followed by clarification to achieve biological treatment of wastewater.The AWTS systems listed below have been certified to the previous Australian Standard AS 1546.3:2008 - On-site domestic wastewater treatment units. Aerated wastewater treatment systems  and approved by the Chief Health Officer for installations in Western Australia.  AS 1546.3:2008 sets out requirements for the design, commissioning, performance and conformity testing of aerated wastewater treatment systems.

In some instances the Government Sewerage Policy 2019 (external site) requires installation of STS and not AWTS. For more details please refer to the Government Sewerage Policy 2019 (external site).

STSs and AWTSs are to be installed and operated in accordance with the Health (Treatment of Sewage and Disposal of Effluent and Liquid Waste) Regulations 1974, the Code of Practice for the Design, Manufacture, Installation and Operation of Aerobic Treatment Units Serving Single Dwellings and AS 1547: 2012 On-site domestic wastewater management.

As the conditions of approval can vary between designs, persons interested in installing a particular STS or AWTS should confirm it meets their needs and discuss site requirements with the local government. For more information on STS and AWTS refer to Secondary Treatment and Aerated Wastewater Treatment Systems.

STSs and AWTSs have regular service requirements (usually quarterly) and maintenance must be through an authorised person or their staff/subcontractors.

Where nutrient retention is required, the local government should be consulted to determine if the nutrient removal capacity of the system will meet their requirements.

Please note that all systems require to be certified to AS1546.3:2017:

  • any new STSs without current certification; and
  • existing AWTS with current certification to AS 1546.3:2008 (as per table below) by the current certification expiry date.

Table 1: Approved STS (certified to AS1546.3:2017)

   
Manufacturer / Distributor Model Capacity Comment / Restrictions Approval Expiry Date
BioSeptic Pty Ltd (external site)
Phone: (02) 4629 6666 or
1300 658 111
Email: sales@bioseptic.com.au
Performa 2020 1500L/day

10EP

Advanced Secondary Treatment System with Chlorine disinfection, 3 Monthly Service and 4.3 yearly sedimentation pump out or as required. Approved for above ground spray irrigation, sub-surface, sub-strata drip irrigation, leach drains and soakwells. The system achieved the following results over testing period to AS 1546.3:2017:
  • TSS 5.8mg/l
  • BOD 1.9mg/l
  • Turbidity 14.5NTU
  • E coli <1 CFU/100ml
Global Certification
Number 576
30/06/2025
Biomax Pty Ltd (external site)  Phone: (08) 92507733                    Email: info@biomax.com.au BioMax-C10   1500L/day 10EP  Secondary Treatment System with Chlorine disinfection, 3 Monthly Service and 5 yearly desludging or as required. Approved for above ground spray irrigation, sub-surface, sub-strata drip irrigation, leach drains and soakwells. The system achieved the following results over testing period to AS 1546.3:2017:
  • TSS < 30 mg/L
  • BOD < 20 mg/L
  • Free Cl > 0.5 mg/L
  • E coli < 10 CFU/100ml
SAI Global Number SMK40530 19/10/2026
Everhard Industries Pty Ltd (external site)
Phone: (08) 94178222
Email: waorders@everhard.com.au
Aqua Advanced Poly and  Concrete  1200L/day  8EP Advanced Secondary Treatment System with Chlorine disinfection, 3 Monthly Service and 3.3 yearly sedimentation pump out or as required. Approved for above ground spray irrigation, sub-surface, sub-strata drip irrigation, leach drains and soakwells. The system achieved the following results over testing period to AS 1546.3:2017:
  • TSS 5.4mg/l
  • BOD 1.25mg/l
  • Turbidity 7.6NTU
  • E coli  0.2 CFU/100ml
Global Certification
Number 632 28/092025
Fuji Clean Australia PTY LTD
Phone: 1300 733 619
Email: dwain@fujiclean.com.au

WA Distributor: 
ECOWATER WA 
Phone: 08 9561 2927 
Email: ecowaterwa@bigpond.com Mob: 0417 098 281

FujiClean ACE 1200 1200L/day

8EP

Advanced Secondary Treatment System with Chlorine disinfection, 3 Monthly Service and 5 yearly sedimentation pump out or as required. Approved for above ground spray irrigation, sub-surface, sub-strata drip irrigation, leach drains and soakwells. The system achieved the following results over testing period to AS 1546.3:2017:
  • TSS 2.9mg/l
  • BOD <2mg/l
  • Turbidity 3.63NTU
  • E coli  <1CFU/100ml
  • Total Nitrogen 14.79mg/l
  • Phosphorus 10.33mg/l
Global Certification
Number 476
15/03/2024
Manfacturer: Hydroscape Pty Ltd

Supplier: Arris Pty Ltd
Phone: (08) 8313 6706
Email: info@arris.com.au
ABSORBS
1200 (Lined System)
1200L/day
8EP
Advanced Secondary Treatment System with (optional) chlorine disinfection, 6 monthly service and 4 yearly septic tank desludging or as required. Approved for sub-surface, sub-strata drip irrigation, leach drains and soakwells. The system achieved the following results over testing period to AS1546.3:2017:
  • BOD ≤10mg/L
  • TSS ≤10mg/L
  • Turbidity ≤10NTU

Chlorine disinfection required where used for above ground spray to achieve E coli ≤10CFU/100ml. Contact supplier to refer to product approval for further details on product restrictions.

SMK41128
28/10/2026
Kingspan Water & Energy Pty Ltd(external site)
Phone:1300 736 562
Email:gerry.quinn@kingspan.com
BioFicient Series 1 1500L/day
10EP
Aerated Secondary treatment system certified to AS 1546.3:2017 SMK40710
22/11/2023
Advanced BioFicient 1200L/day
8EP
Advanced Secondary Treatment System with Chlorine disinfection, 3 Monthly Service and 2 yearly sedimentation pump out or as required. Approved for above ground spray irrigation, sub-surface, sub-strata drip irrigation, leach drains and soakwells.The system achieved the following results over testing period to AS 1546.3:2017:
  • TSS 4.1mg/l
  • BOD 1.07mg/l
  • Turbidity 6.9NTU
  • E coli  <1CFU/100ml
Global Certification
Number 581
10/06/2025
Taylex Australia Pty Ltd (external site)
Phone: 1300 TAYLEX (1300 829539)
Email: info@taylex.com.au
Taylex ABS 1500 (Concrete and plastic) 1500L/day
10EP
Advanced Secondary Treatment System with Chlorine disinfection, 3 Monthly Service and 3.2 yearly sedimentation pump out or as required. Approved for above ground spray irrigation, sub-surface, sub-strata drip irrigation, leach drains and soakwells.The system achieved the following results over testing period to AS 1546.3:2017:
  • TSS 7.6mg/l
  • BOD 1.5mg/l
  • Turbidity 31.1NTU
  • E coli 1.4 CFU/100ml
Global Certification
40/22
19/08/2025
Taylex ABS 5000 Concrete 5000L/day

33EP

Advanced Secondary Treatment System with Chlorine disinfection, 3 Monthly Service and 3.2 yearly sedimentation pump out or as required. Approved for above ground spray irrigation, sub-surface, sub-strata drip irrigation, leach drains and soakwells.The system achieved the following results over testing period to AS 1546.3:2017:
  • TSS 6.12mg/l
  • BOD 1.07mg/l
  • Turbidity 8.51NTU
  • E coli  0.41 CFU/100ml
  • Nitrogen 45.68mg/l
  • Phosphorus 9.21mg/l
Global Certification
40/24
16/12/2025
Toowomba Tanks Pty Ltd (external site)
Phone: (07) 4634 3860
Email: sales@tanks.com.au

WA Distributor:
TMC Australasia: 0418 267 959 
Email: tony@tmcwaterrecycling.com
TurboJet Single 1500L/day

10 EP

Advanced Secondary Treatment System with Chlorine disinfection, 3 Monthly Service and 3.5 yearly sedimentation pump out or as required.Approved for above ground spray irrigation, sub-surface, sub-strata drip irrigation, leach drains and soakwells. The system achieved the following results over testing period to AS 1546.3:2017:
  • TSS 9.2mg/l
  • BOD5 <2mg/l
  • Total Nitrogen 51.1mg/l
  • Phosphorus 11.6mg/l
  • Turbidity 8.8NTU
  • E coli <1CFU/100ml
Global Certification

567
22/05/2025

Table 2: Approved AWTS (certified to AS1546.3:2008)

Manufacturer / Distributor Model Capacity Comment / Restrictions Approval Expiry Date
Allied Pumps (external site)
Phone: 9350 1000 / 1800 447 777
Email: sales@alliedpumps.com.au
Everhard

Aqua-Nova 2000
Model 80100

1800L/day Aerated Wastewater Treatment System certified to AS1546.3:2008 Global Certification

No. 077
16/02/2022

Aquarius Wastewater Systems Pty Ltd (external site)
Phone: 9240 8545
Email:admin@aquariuswastewater.com.au
Aquarius O–3 1800L/day Aerated Wastewater Treatment System with Ozone disinfection and Alum dosing.
Nutrient reduction capability: N reduced to <10mg/L. &  P reduced to < 1mg/L as per certification SMKH21519 to AS1546.3:2008
SMKH21519
25/03/2026
Aquarius O–2 1800L/day Aerated Wastewater Treatment System without disinfection and Alum dosing certified to AS1546.3:2008.
Aquarius O–2 NR 1800L/day Aerated Wastewater Treatment System without  disinfection, with Alum dosing.
Nutrient reduction capability: N reduced to <10mg/L. &  P reduced to < 1mg/L as per certification SMKH21519 to AS1546.3:2008
Biolytix Ltd (external site)
WA Distributor:
Water installations: 9295 6263
BF6 - Mark 2 1600L/day Aerated Wastewater Treatment System without disinfection,certified to AS1546.3:2008 SMK40499

31/12/2025

Jowa Group Pty Ltd (external site)
Phone: 8381 9100
Email: admin@biocycle.com.au

WA Distributors:
Greg Browden: 0401 967 330

Biocycle BIO-7000 1500L/day

10EP

Aerated Wastewater Treatment System with Chlorine disinfection, certified to AS1546.3:2008 SMKH20266

22/11/2025

Global Roto-Moulding Pty Ltd (external site)
Phone: (07) 4697 7099
Email: info@globalwater.com.au
UBI Aqua 6000L 1500L/day Aerated Wastewater Treatment System with Chlorine disinfection, certified to AS1546.3:2008 SMK40298

10/05/2022

Graf Australia Pty Ltd (external site)


Phone: 1300 131 971
Email: info@grafaustralia.com.au

WA Distributor:
Aquarius Wastewater Systems PL (external site)
Phone: 9240 8545
Email: mel@aquariuswastewater.com.au

Graf E-Pro 15-1

Graf E-Pro  15-1C

Graf E-Pro 15-1 PAC

1500L/day Aerated Wastewater Treatment System with some Nitrogen and Phosphorus reduction and 4 monthly service achieving the following average results tested to AS1546.3:2008:

TP (% removal): 3 mg/L (54%)
TN (% removal): 24 mg/L (50%) 

Global certification

No. 329, 329/1 & 188 &188/2

26/10/2024

Graf E-Pro 15-2

Graf E-Pro 15-2C

Graf E-Pro 15-2 PAC

1500L/day Aerated Wastewater Treatment System with some Nitrogen and Phosphorus reduction and 6 monthly service achieving the following average results tested to AS1546.3:2008:

TP (% removal): 3 mg/L (54%)
TN (% removal): 24 mg/L (50%)

Graf E-Pro 15-3

Graf E-Pro 15-3+O

Graf E-Pro 15-3 PAC

1500L/day Aerated Wastewater Treatment System with some Nitrogen and Phosphorus reduction and 6 monthly service achieving the following average results tested to AS1546.3:2008:

TP (% removal): 3 mg/L (54%)
TN (% removal): 24 mg/L (50%)

Suncoast Waste Water Management (external site)>

Phone: 1800 450 767
Email: info@ozzikleen.com
Ozzi Kleen RP-10 2000L/day Aerated Wastewater Treatment System with Chlorine disinfection, certified to AS1546.3:2008 SMK02608

14/08/2026

Ozzi Kleen RP-10A+ 2000L/day Aerated Wastewater Treatment System with Chlorine disinfection and Alum dosing, certified to AS1546.3:2008
Taylex Australia Pty Ltd (external site)
Phone: 1300 TAYLEX (1300 829539)
Email: info@taylex.com.au
Taylex ABS 10EP
(Concrete and plastic)
2000L/day Aerated Wastewater Treatment System with some Nitrogen and Phosphorus reduction and 3 monthly service achieving the following average results tested to AS1546.3:2008: TP (% removal): 2.5 mg/L (84.67%)
TN (% removal): 24.9 mg/L (53.71)
Global Certification

040/8 & 040/10

11/07/2025

Taylex ABS 8EP
(Concrete and plastic)
1200L/day Aerated Wastewater Treatment System with some Nitrogen and Phosphorus reduction and 3 monthly service achieving the following average results tested to AS1546.3:2008:

TP (% removal): 2.5 mg/L (84.67%)
TN (% removal): 24.9 mg/L (53.71)

Table 3: Systems assessed and not approved or approval withdrawn

Manufacturer Model Reason not approved / Further information
BioSystems 2000 Pty Ltd Biosystem 2000 Certification is not provided as of 1 July 2015.
Earthsafe Environmental Pty Ltd Earthsafe Environmental Certification SMKH20612 is not available online
Fuji Clean Australia Pty Ltd CE1200 Certification is not provided as of 1 July 2015.
Galvin Concrete & Sheetmetal Pty Ltd Clearwater 90 Compact Certification is not provided as of 1 July 2015.
Icon-Septech Pty Ltd Septech Turbojet 2000 Company liquidated. For further information, visit:
Australian Securities and Investments Commission (external site). Systems that have been purchased on or before 27 June 2016 may still be installed.
Jowa Group Pty Ltd Biocycle 5800 Certification not provided as of 1 July 2015.
Water Gurus Pty Ltd Novaclear Company liquidated. For further information, visit:
Australian Securities and Investments Commission (external site)

More information

Environmental Health Directorate
Department of Health
Telephone: 9222 2000
Email: ehinfo@health.wa.gov.au

Last reviewed: 07-12-2021
Produced by

Environmental Health Directorate