Trade Waste Agreements in Melbourne: A Complete Business Guide

What Is a Trade Waste Agreement?

A trade waste agreement is a legally binding contract between your business and your water authority that permits you to discharge trade waste — including wastewater from grease traps — into Melbourne’s sewer system. Without a valid agreement, discharging any trade waste is illegal and can result in prosecution under the Water Act 1989 and EPA Victoria regulations.

If your Melbourne business operates a commercial kitchen, food preparation area, or any process that generates wastewater containing fats, oils, grease, or other contaminants, you need a trade waste agreement. It’s not optional — it’s a fundamental requirement for lawful operation.

Melbourne’s Three Water Authorities

Melbourne’s sewer system is managed by three retail water authorities, each responsible for a different geographic area. Your trade waste agreement is held with whichever authority services your business location:

Yarra Valley Water

Yarra Valley Water serves Melbourne’s northern and eastern suburbs, including areas such as Heidelberg, Doncaster, Box Hill, Ringwood, the Yarra Valley, and parts of the Melbourne CBD.

Application process — Complete the online trade waste application form, providing details of your business type, wastewater volumes, and pre-treatment equipment (including grease trap specifications).
Inspection — A Yarra Valley Water trade waste officer will inspect your premises to verify your grease trap installation and assess your wastewater characteristics.
Agreement categories — Yarra Valley Water categorises trade waste customers into tiers based on risk and volume. Most food service businesses fall into Category 2 (consent agreement).
Annual fees — Include a trade waste service charge plus volume-based charges for contaminant loads exceeding standard thresholds.

South East Water

South East Water covers Melbourne’s south-eastern suburbs, including areas like St Kilda, Dandenong, Frankston, the Mornington Peninsula, and Cranbourne.

Application process — Submit a trade waste application online or via their customer service team. You’ll need your property details, business registration, and grease trap specifications.
Site assessment — South East Water conducts a site assessment to verify compliance with their trade waste acceptance criteria and AS 4674 standards.
Agreement types — Standard agreements for food service businesses typically include conditions around grease trap sizing, cleaning frequency, and record-keeping.
Monitoring — South East Water may conduct periodic sampling of your trade waste discharge to verify compliance with agreed contaminant limits.

City West Water

City West Water services Melbourne’s western suburbs and parts of the CBD, including Footscray, Sunshine, Werribee, Melton, and the western CBD fringe.

Application process — Submit an application through City West Water’s trade waste team, including your business details and pre-treatment equipment information.
Compliance requirements — City West Water has specific requirements for grease trap maintenance schedules, which are written into your trade waste agreement conditions.
Fees and charges — Similar to other authorities, fees include a base service charge plus usage-based components.
Enforcement — City West Water actively monitors compliance and issues non-compliance notices for breaches.

Not sure which water authority serves your area? Visit our trade waste agreement page to find out, or contact us for assistance.

What Your Trade Waste Agreement Covers

A typical Melbourne trade waste agreement includes the following conditions:

Pre-treatment requirements — Specification of required grease trap or other treatment equipment, including minimum sizing requirements.
Discharge limits — Maximum allowable concentrations for FOG, total suspended solids (TSS), biochemical oxygen demand (BOD), pH, and temperature.
Maintenance obligations — Required cleaning frequency for your grease trap and documentation standards. Most agreements reference the 25% rule.
Record-keeping — Obligation to retain Waste Transport Certificates and maintenance logs for a minimum of three years.
Right of entry — Your water authority’s right to inspect your premises, sample your discharge, and audit your records at any reasonable time.
Reporting — Requirements to notify your water authority of any changes to your operations, equipment, or discharge characteristics.

How to Apply for a Trade Waste Agreement

The application process is broadly similar across all three water authorities. Here’s a step-by-step guide:

Step 1: Gather Your Information

Before applying, you’ll need:

Your property address and connection details
Business name and ABN
Type of business and description of operations
Details of your grease trap (size, type, location, installer)
Estimated daily wastewater volumes
Any other pre-treatment equipment details

Step 2: Submit Your Application

Complete the application form for your water authority — all three offer online submissions. Include all supporting documentation, such as grease trap installation certificates and plumber’s compliance certificates.

Step 3: Site Inspection

A trade waste officer will visit your premises to inspect your grease trap installation, verify it meets AS 4674 requirements, and assess your wastewater management practices. This inspection is typically scheduled within 2-4 weeks of your application.

Step 4: Agreement Issued

If your premises meet all requirements, your water authority will issue your trade waste agreement. Review the conditions carefully — they become legally binding obligations for your business.

Step 5: Ongoing Compliance

Once your agreement is active, you must maintain compliance with all conditions, including regular grease trap cleaning, record-keeping, and timely payment of trade waste charges.

Need help navigating the application process? Our trade waste agreement assistance service guides Melbourne businesses through every step, from initial application to ongoing compliance management.

Common Reasons Trade Waste Applications Are Rejected

Applications can be rejected or delayed for several reasons:

Undersized grease trap — The trap doesn’t meet the minimum capacity for your business’s wastewater flow rate.
Non-compliant installation — The trap wasn’t installed to AS 4674 standards or isn’t accessible for maintenance.
Incomplete documentation — Missing plumber’s compliance certificates or installation records.
Unapproved discharge — The application reveals contaminants that require additional pre-treatment before sewer discharge is acceptable.

Trade Waste Agreement Costs

Costs vary by water authority and your business’s discharge characteristics, but typical annual costs for a food service business in Melbourne include:

Application fee — $0 to $300 (some authorities waive this for straightforward applications)
Annual service charge — $300 to $800 depending on your agreement category
Volume charges — Based on your metered water consumption and contaminant load
Excess charges — Additional fees if your discharge exceeds agreed contaminant limits

While these costs represent an ongoing business expense, they’re far less than the penalties for operating without a valid agreement.

Renewing and Updating Your Agreement

Trade waste agreements typically remain in force until cancelled by either party, but you must notify your water authority of any material changes to your operations, including:

Changes to your menu or food preparation processes that affect wastewater characteristics
Renovations or modifications to your kitchen or grease trap
Change of business ownership
Significant changes to operating hours or trading volume

Failure to notify your water authority of changes can void your agreement and expose you to non-compliance penalties.

For businesses in Melbourne’s city centre, our Melbourne CBD grease trap cleaning service includes comprehensive trade waste compliance support. We also recommend reading our guide on water authority trade waste requirements for a detailed comparison of what each authority expects.