An Aerated Wastewater Treatment System (AWTS) is a sophisticated biological treatment plant installed right in your backyard. Unlike basic gravity septic tanks that rely solely on anaerobic settling and soil absorption, an AWTS utilises multi-stage aerobic bacterial digestion, clarification, and continuous chlorination or UV disinfection to treat household wastewater into clear, odourless recycled water suitable for garden surface spraying or subsurface dripline irrigation.
Because an AWTS relies on electromechanical blowers, submersible pumps, and precise chemical disinfection, regular servicing is not just good practice—it is a legal requirement under the NSW Local Government (General) Regulation 2021 and local council On-Site Sewage Management (OSSM) policies.
Our 10-Point Certified AWTS Inspection Protocol
During every scheduled quarterly service visit, our accredited technicians execute a rigorous 10-point mechanical and biological inspection:
- Aeration Dissolved Oxygen (DO) & Clarity Testing: Measuring active dissolved oxygen levels in the aeration chamber to confirm aerobic bacteria are thriving.
- Sludge Settling Volume Test (30-Min Cone): Measuring secondary clarifier settleability to ensure biological floc is not carrying over into irrigation lines.
- Air Blower & Compressor Diagnostic: Inspecting air intake filters, checking diaphragm pressure, and verifying manifold air distribution.
- Submersible Irrigation Pump Check: Testing automatic float switches, check valves, and head discharge pressure.
- Disinfection & Tablet Replenishment: Checking chlorine contact chambers and refilling approved slow-dissolve sanitising tablets.
- Irrigation Disc Filter Cleaning: Dismantling and pressure-washing 120-mesh disc filters to prevent nozzle blockages.
- Irrigation Area Inspection: Inspecting surface sprayers, dedicated subsurface driplines, and safety warning signage for pooling or damage.
- High-Water Alarm Verification: Testing audible buzzer and visual strobe warning beacons.
- Oatmeal / Scum Scrape & Airlift Recirculation Check: Verifying sludge return lines are recycling active biomass to the primary chamber.
- Electronic Council Compliance Lodgement: Uploading the completed NSW Health service log directly to your local LGA council portal.
Common AWTS Brands We Service Daily
- Fuji Clean (CE1500EX, CRX): High-efficiency Japanese composite systems with energy-saving linear diaphragms.
- Taylex (ABS, Poly, Concrete): Australia's longest-running secondary aerated brand.
- Aqua Nova, Biocycle, Ozzi Kleen & Econocycle: Specialized concrete and poly aerated units throughout rural NSW.
AWTS Servicing & Desludging Pricing
- Quarterly Routine Service Visit: $90 – $150 AUD per quarter (or $360 – $600 AUD on an annual prepaid plan).
- Air Blower Replacement / Rebuild: $650 – $1,400 AUD (includes high-output linear blower and pressure balancing).
- Submersible Irrigation Pump Replacement: $600 – $1,200 AUD (commercial-grade cast iron / stainless cutter pumps).
- Full 3–5 Year Primary Chamber Desludge: $450 – $750 AUD (complete vacuum pump-out of accumulated digested solids).
To ensure your property maintains full OSSM compliance without hassle, call our certified AWTS team on (02) 4058 1923 or explore our Hunter Valley AWTS Servicing Cost Guide.
Frequently Asked Questions
Why is quarterly AWTS servicing mandatory in NSW? ▼
Under the NSW Local Government Act and NSW Health regulations, all secondary aerated treatment systems must be serviced every 3 months by an accredited service technician to ensure effluent meets microbial disinfection standards before surface irrigation.
How much does quarterly AWTS maintenance cost? ▼
Routine quarterly servicing ranges from $90 to $150 AUD per visit ($360 to $600 AUD annually). This includes mechanical testing, chlorine replenishment, filter washing, and electronic council compliance report submission.
What brands of AWTS systems do you service? ▼
We service all major Australian AWTS brands including Fuji Clean, Taylex, Aqua Nova, Biocycle, Ozzi Kleen, Econocycle, Garden Master, and Super-Treat.
Do I need to send the service report to council myself? ▼
No. Our automated system electronically lodges your certified quarterly inspection report directly with Maitland, Cessnock, Singleton, Port Stephens, or Dungog council after every visit.
How often does an AWTS system need to be pumped out / desludged? ▼
While mechanical inspections happen quarterly, the primary settling chamber and clarifier chamber require a full vacuum pump-out every 3 to 5 years ($450–$750 AUD) to remove heavy digested sludge.
What should I do if my AWTS alarm buzzer sounds? ▼
Mute the audible buzzer using the silence switch on the control box, minimise household water usage immediately, and call our emergency technician on (02) 4058 1923 for prompt diagnosis.