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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

Filtrex Innovative Wastewater Solutions (external site)

59 McCombe Road
Bunbury WA 6231
Ph: (08) 9726 0118
Email: info@filtrex.com.au

www.filtrex.com.au

  Filtrex STS8 1200L/day  8EP Advanced Secondary Treatment System. The system achieved the following results over testing period to AS 1546.3:2017: Amended soil filtration. 
  • TSS <10mg/l (Avg. <5))
  • BOD5 <10mg/l (Avg.<4)
  • Total Nitrogen Avg. 22mg/l (62%) 
  • Total Phosphorus Avg. 0.05mg/l (99%)
 SAI Global Number SMK40786 08/05/2028
Fuji Clean Australia PTY LTD
Phone: 1300 733 619
Email: brook@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
FujiClean ACE 3000 3000L/day
20 EP		 Advanced Secondary Treatment System with Chlorine disinfection, 3 Monthly Service and 2.3 yearly sedimentation pump out or as required. Approved for 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:
  • BOD 1.29 mg/L
  • TSS 4.98 mg/L
  • Turbidity 9.12 NTU
  • E.coli 0.2 CFU/100mL
  • TN (% removal): 29.37 mg/L (61.25%)
  • TP (% removal): 10.66 mg/L (6.49%)
 Global Certification
Number 649
14/02/2026
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
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
  Taylex ABSNR 1350
(Concrete and Poly) 		1350L/day
9EP 		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 4.29mg/l (99.50%)
  • BOD 1.63mg/l (98.90%)
  • Turbidity 6.26NTU 
  • E coli  0.95 CFU/100ml (99.99%)
  • Nitrogen 23.3mg/l (66.90%) 
  • Phosphorus 8.56mg/l (26.46%)
 Global Certification
4382-3039-01 (Concrete)
4386-3039-01 (Poly)
29/11/2027
  Taylex ABSNR 1350+P
(Concrete and Poly)		 1350L/day
9EP 		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 3.83mg/l (99.02%)
  • BOD 2.76mg/l (99.14%)
  • Turbidity 5.63NTU 
  • E coli  0.73 CFU/100ml (99.99%)
  • Nitrogen 22.51mg/l (68%) 
  • Phosphorus 0.39mg/l (96.65%)
 Global Certification
4383-3039-01 (Concrete)
4387-3039-01 (Poly)
29/11/2027
  Taylex ABSNR 2000
(Concrete and Poly) 		2000L/day
12EP 		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 5.63mg/l (98.56%)
  • BOD 2.59mg/l (99.20%)
  • Turbidity 11NTU 
  • E coli  0.8 CFU/100ml (99.99%)
  • Nitrogen 31.94mg/l (54.70%) 
  • Phosphorus 8.76mg/l (24.74%)
 Global Certification
4384-3039-01 (Concrete)
4388-3039-01 (Poly)
29/11/2027
  Taylex ABSNR 2000+P
(Concrete and Poly) 		2000L/day
12EP 		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 4.61mg/l (98.82%)
  • BOD 4.22mg/l (98.69%)
  • Turbidity 9.71NTU 
  • E coli  1.12 CFU/100ml (99.99%)
  • Nitrogen 31.41mg/l (55.40%) 
  • Phosphorus 0.82mg/l (93.30%)
 Global Certification
4385-3039-01 (Concrete)
4389-3039-01 (Poly)
29/11/2027
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
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 Global Certification (No.3170) to AS1546.3:2008

Global Certification
No. 3170

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 Global Certification (No.3170) 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
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

AWTS Maintenance Services Pty Ltd (WA Supplier Ebenzer Water)

 Envirocycle 10 NR Department of Health product approval expired 14 February 2011.
Aquarius Wastewater Systems Pty Ltd  Aquarius O-2NR, O-2 & O-3 4KL Certification is not provided as of 31 March 2023
Biomax Pty Ltd C20 or C2.6 KL
C4.1KL		 Certification is not provided as of 31 March 2023
P10-M  Department of Health product approval expired 27 January 2011. 
BioSystems 2000 Pty Ltd Biosystem 2000 Certification is not provided as of 1 July 2015.

Clearwater Domestic Sewage (WA Supplier Galvin Concrete & Sheetmetal Pty Ltd)

 Clearwater 90 Compact  Certification is not provided as of 1 July 2015. 
Earthsafe Environmental Pty Ltd Earthsafe Environmental Certification SMKH20612 is not available online.

Everhard (WA Supplier Allied Pumps)

 Everhard Aqua-Nova 2000 Model 80100  Certification is not provided as of 31 March 2023. 
Fuji Clean Australia Pty Ltd CE1200 Certification is not provided as of 1 July 2015.
CRX1500  Department of Health product approval expired 9 December 2014.
CE1500EX  Department of Health product approval expired 9 May 2021.
CE4200 or CE-21
 Certification is not provided as of 31 March 2023
Global Roto-Moulding Pty Ltd
 UBI Aqua 6000L
 Certification is not provided as of 10 May 2022.
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.
Kingspan Water and Energy Pty Ltd
 Bioficient Series 1
 Certification as expired 22 November 2023 and no longer manufactured
Krystal Kleer  ADV5000  Certification not provided as of 21 August 2017.
Magnesium Tech PL  Magnesium DMS Certification not provided as of 31 July 2017. 

Orenco (WA Supplier Innoflow)

 AX-20  Department of Health product approval expired 1 September 2014.
Ozzie Kleen SK20  Certification not provided as of 31 July 2023. 
RP10S and RP10S+  Application pending.  
Taylex Australia Pty Ltd Taylex DMS  Certification not provided as of 31 July 2017.
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: 27-03-2023
Produced by

Environmental Health Directorate

wa.gov.au