Melbourne Water Authority Trade Waste Requirements: Yarra Valley, South East & City West

Understanding Melbourne’s Water Authority Landscape

Melbourne’s trade waste management is overseen by three retail water authorities, each responsible for a distinct geographic region. While all three operate under the same overarching Victorian legislation — including the Water Act 1989, the Environment Protection Act 2017, and EPA Victoria guidelines — their specific trade waste requirements, fee structures, and enforcement approaches differ in important ways.

If your business holds or needs a trade waste agreement, understanding your specific water authority’s requirements is essential. This guide provides a detailed comparison to help Melbourne businesses navigate their obligations.

Geographic Coverage

Yarra Valley Water

Yarra Valley Water serves approximately 1.9 million people across Melbourne’s northern and eastern suburbs. Key service areas include:

• Melbourne CBD (eastern portion)
• Inner north: Fitzroy, Collingwood, Carlton, Brunswick
• Eastern suburbs: Doncaster, Box Hill, Ringwood, Croydon
• Outer east: Lilydale, Healesville, Yarra Glen
• Northern suburbs: Heidelberg, Ivanhoe, Greensborough, Whittlesea

South East Water

South East Water provides services to approximately 1.8 million customers in Melbourne’s southern and south-eastern suburbs:

• Inner south: St Kilda, South Melbourne, Port Melbourne
• South-eastern suburbs: Dandenong, Springvale, Noble Park
• Bayside: Brighton, Sandringham, Mordialloc
• Outer south-east: Cranbourne, Pakenham, Berwick
• Mornington Peninsula: Frankston, Mornington, Rosebud

City West Water

City West Water serves around 900,000 people in Melbourne’s western suburbs and parts of the CBD:

• Melbourne CBD (western portion)
• Inner west: Footscray, Yarraville, Seddon
• Western suburbs: Sunshine, St Albans, Deer Park
• Outer west: Werribee, Melton, Bacchus Marsh
• North-west: Sunbury, Tullamarine

Not sure which authority covers your business? Check your water bill or visit our trade waste agreement page to find out.

Grease Trap Requirements Comparison

All three water authorities require food service businesses to install and maintain grease traps, but specific requirements vary:

Trap Sizing

• Yarra Valley Water — Requires grease traps sized in accordance with AS 4674 and their own trade waste guidelines. Minimum trap sizes are determined by fixture unit calculations and peak wastewater flow rates.
• South East Water — Also requires AS 4674 compliance. They may request larger trap sizes for high-volume businesses and have specific requirements for businesses in sensitive sewer catchments.
• City West Water — Follows AS 4674 sizing requirements and may impose additional conditions for businesses in areas with known sewer capacity constraints.

Cleaning Frequency

• Yarra Valley Water — Requires cleaning before FOG and solids reach 25% of liquid depth. Does not mandate a fixed cleaning schedule but expects businesses to demonstrate compliance through records.
• South East Water — Also enforces the 25% rule. For some business categories, they specify a minimum cleaning frequency (e.g., monthly for high-volume restaurants) in the trade waste agreement.
• City West Water — Enforces the 25% rule and may specify minimum cleaning frequencies in agreement conditions. Businesses in their network with a history of sewer issues may face stricter requirements.

Record-Keeping

• All three authorities require retention of Waste Transport Certificates for a minimum of three years, along with maintenance logs documenting each service visit.
• Yarra Valley Water additionally requests that businesses maintain a grease trap maintenance logbook on-site, available for inspection at any time.
• South East Water may require quarterly or annual compliance reports for higher-risk businesses.
• City West Water accepts both digital and paper records but expects records to be produced within 24 hours of a request.

Trade Waste Acceptance Criteria

Each water authority sets limits on the quality of trade waste that can be discharged into the sewer. Key parameters for food service businesses include:

Discharge Limits Comparison

• FOG (Fats, Oils, and Grease) — All three authorities typically set a limit of 100mg/L in the effluent leaving your grease trap. Some agreements may specify stricter limits.
• Total Suspended Solids (TSS) — Typical limit of 300-600mg/L, varying by authority and agreement category.
• Biochemical Oxygen Demand (BOD) — Usually limited to 300-600mg/L.
• pH — Must fall within 6.0-10.0 for all three authorities.
• Temperature — Discharge must not exceed 38°C at the property boundary.

If your discharge exceeds these limits, your water authority may impose excess charges, require additional pre-treatment, or take enforcement action. Use our compliance checker to assess whether your current setup meets these standards.

Fee Structures

Trade waste fees across Melbourne’s water authorities typically consist of:

Yarra Valley Water

• Annual trade waste service charge: varies by agreement category
• Volume charge based on metered water consumption
• Quality charges for contaminant loads exceeding thresholds
• Re-inspection fees for non-compliance follow-ups

South East Water

• Annual trade waste service charge
• Volumetric sewage disposal charge
• Quality-based charges for excess contaminant loads
• Application and assessment fees for new agreements

City West Water

• Annual trade waste charge
• Sewage disposal charges based on volume
• Excess mass charges for contaminants above acceptance limits
• Compliance audit fees where applicable

Exact fee amounts are updated annually and published on each authority’s website. Budget approximately $500-$1,500 per year for trade waste charges, depending on your business size and discharge characteristics.

Inspection and Enforcement Approaches

Each water authority has its own approach to monitoring compliance:

• Yarra Valley Water — Conducts both scheduled and unannounced inspections. They use a risk-based approach, with higher-risk businesses inspected more frequently. First-time non-compliance typically results in a warning and compliance deadline.
• South East Water — Operates an active inspection program with random sampling of trade waste discharges. They may install temporary monitoring equipment on your sewer connection. Enforcement escalates from warnings to fines to agreement suspension.
• City West Water — Conducts regular compliance audits and responds to sewer blockage reports by investigating nearby trade waste customers. They have been increasingly proactive in enforcement actions in recent years.

All three authorities can refer serious or repeated non-compliance to EPA Victoria for prosecution under the Environment Protection Act 2017. Review our regulations page for more detail on enforcement powers and penalties.

Tips for Multi-Site Melbourne Businesses

If your business operates across multiple Melbourne locations, you may need trade waste agreements with more than one water authority. Key considerations include:

• Each site requires its own separate trade waste agreement
• Requirements may differ between authorities, so don’t assume one site’s compliance approach works for another
• Centralise your documentation — maintain a single system for managing WTCs and service records across all sites
• Use a single grease trap service provider across all sites for consistency in service standards and documentation

Melbourne Grease Trap Cleaning services businesses across all three water authority regions. We understand the specific requirements of Yarra Valley Water, South East Water, and City West Water, and ensure our service documentation meets each authority’s standards. Read our trade waste agreement guide for help with the application process.