Grease Filter Washing: Stormwater and Trade Waste Responsibilities
Washing commercial kitchen grease filters produces wastewater containing grease, food residue and cleaning chemicals. Where that water goes matters as much as how the filters are cleaned.
Stormwater is not the sewer
Stormwater drains discharge to waterways without the treatment applied to sewer wastewater. Grease and detergent must not be washed into stormwater drains, gutters or outdoor areas where runoff can reach them. A gully or drain should not be used until its destination and permitted use are confirmed.
Check trade waste conditions before washing
A connection to the sewer is not automatic permission to discharge commercial cleaning wastewater. Ask your local water corporation about the trade waste agreement, pre-treatment and disposal conditions that apply to your site. Do not assume a grease trap permits every type of chemical discharge.
Questions to ask a filter-cleaning provider
Ask where filters are washed, how grease and solids are collected, how wastewater is managed and what approvals apply to that operation. An off-site grease filter exchange service can separate filter maintenance from a busy kitchen, but the disposal arrangements still matter.
Use reliable guidance, not a headline fine
Penalty amounts and enforcement decisions depend on the circumstances and applicable law. This guide does not claim a fixed fine or automatic prosecution. EPA Victoria’s stormwater guide for industry explains the distinction between stormwater and sewer systems; it is historical guidance, so confirm current requirements with EPA and your water corporation.
Filter care is not a full-system clean
Exchanging filters does not remove grease from the plenum, ductwork or fan. Keep the filter schedule and full kitchen exhaust cleaning scope separate in your maintenance records.
Arrange a commercial service
Clean Air Filtration provides commercial kitchen exhaust cleaning in Melbourne and Victoria. Tell us your site location, system details, access restrictions and operating hours so we can discuss the cleaning scope. Call (03) 9303 9661 or email sales@cleanair.com.au.
Every client receives a client portal, including one-off services. Completed-service PDF reports and job photos are available there. See our service records guide for what to keep with your maintenance history.
Cover image: AI-generated editorial illustration of representative equipment or premises, not a client-site photograph.