Grease Trap Regulations in Manitoba

Overview

Manitoba food service owners must follow municipal sewer by-laws. These rules require grease trap installation and regular maintenance. They exist to keep fats, oils, and grease (FOG) out of the wastewater system. All commercial, institutional, and food service businesses in Manitoba must have a grease trap installed by law. The City of Winnipeg enforces strict cleaning schedules and record-keeping rules. These rules protect city infrastructure from grease blockages and sewer overflows. Other Manitoba municipalities follow similar frameworks.

Governing Authorities

Federal anchor. Like all Canadian provinces, Manitoba's FOG rules sit below two federal layers. The Fisheries Act, R.S.C. 1985 c. F-14 §36(3) bans the deposit of harmful substances in waters frequented by fish. The Wastewater Systems Effluent Regulations (SOR/2012-139) set national baseline standards for municipal wastewater systems. Equipment must meet CSA B481 — Canada's standard for grease-interceptor design, harmonized with ASME A112.14.3:2022.

FOG enforcement in Manitoba is mainly handled at the city level, with oversight from Manitoba Environment and Climate. Manitoba's Environment Act (CCSM c. E125) sets the provincial framework for wastewater discharge. The Environmental Compliance and Enforcement Branch inspects operations and enforces legislation. It also responds to environmental incidents and complaints to protect public health.

The City of Winnipeg Water and Waste Department runs the most thorough FOG program in the province. It applies to all commercial food service operations in the city. Other Manitoba municipalities set their own sewer use by-laws. These typically follow similar rules for grease management and interceptor requirements.

Key Requirements

Manitoba food service owners must meet these core requirements:

• Mandatory Installation: Winnipeg's sewer use bylaw requires all commercial, institutional, and food service businesses to have a grease trap.
• Cleaning Frequency: Clean under-the-sink traps at least weekly. If the trap is more than 50% full when you clean it, clean it more often. Large outdoor interceptors must be cleaned every three months or when 25% full, whichever comes first.
• Licensed Service Providers: Weekly cleanings must be done and documented by a licensed plumber.
• Record-Keeping: Maintenance logs are required. The last 12 months of records must be available for inspection.
• Professional Installation: A licensed plumber must install the trap.
• Proper Sizing: A licensed plumber determines the right size based on flow rate from sinks, dishwashers, and mop sinks.

Fines and Enforcement

Manitoba cities impose escalating fines for grease trap violations. In Winnipeg, first, second, and further offences carry higher fines under the bylaw's penalty schedule for repeat offences. Fine amounts increase with each new violation. Contact the City of Winnipeg Water and Waste Department for current fine amounts, as these may change.

Beyond fines, the city can act at the owner's expense. This includes sewer cleaning costs to clear grease blockages. It also covers fixing damage in neighbouring properties — such as sewer backup — caused by a failing trap. Health inspection failures can lead to closure orders. Owners may also face liability if grease reaches waterways through sewer overflows.

Major City FOG Programs

Winnipeg

The City of Winnipeg's sewer use bylaw requires all commercial, institutional, and food service businesses to have a grease trap. Winnipeg stands out for its strict weekly cleaning rule for under-sink units. The Water and Waste Department inspects regularly. It requires maintenance logs showing cleaning dates and grease levels at each service. The FOG program protects the North End Water Pollution Control Centre. It also works to reduce grease blockages in older sewer mains across the city.

Brandon

The City of Brandon does not publish a standalone FOG bylaw. Commercial wastewater rules are covered under Brandon's general Water and Wastewater By-laws (M225 and Rates By-law 7342). Owners with grease-trap obligations should contact City of Brandon Public Works for specific requirements. Brandon Public Works can confirm sizing, cleaning, and record-keeping rules that apply to your operation.

Frequently Asked Questions

How often must I clean my grease trap in Manitoba?

It depends on trap size and location. Under-the-sink traps must be cleaned weekly. If the trap is more than 50% full when you clean it weekly, clean it more often. Larger outdoor interceptors typically require cleaning every three months or when 25% full, whichever comes first. High-volume kitchens or those using food waste grinders may need more frequent service. All cleaning must be done by licensed professionals and documented in maintenance logs. Keep a record of each service visit.

Can I get a waiver from installing a grease trap?

You can request a conditional waiver if there is no cooking or cleanup on site. The city will review your operation to decide if a waiver applies. Waivers are only granted where minimal FOG is generated. Even businesses that skip cooking oils may still need a grease trap. Fats from butter, margarine, and mayonnaise still enter wastewater. The city makes the final call on all waiver requests.

What records must I keep for grease trap maintenance?

The maintenance log shows how often you clean the trap and how full it is each time. Winnipeg's sewer use bylaw requires this log. It also requires that the last 12 months of records be available for inspection at any time. Records must include service dates, grease levels at each cleaning, the licensed provider's name, and waste disposal manifests. Keep them at your location and ready for inspectors. Electronic copies are a good backup.

Find Grease Trap Service in Manitoba

Staying compliant means working with licensed professionals who know local rules. Our directory lists 6 certified providers across Manitoba. They offer installation, maintenance, emergency cleaning, and compliance documentation. They know the by-law requirements in Winnipeg, Brandon, and other communities. Visit our Manitoba grease trap service directory to connect with licensed professionals.