Chicago Grease Trap & Interceptor Requirements for Restaurants

Chicago Grease Trap Compliance Standards

The Chicago Department of Public Health requires all food service establishments to install and maintain grease traps or interceptors in accordance with the Chicago Municipal Code (Title 41, Chapter 41-8). Grease trap capacity must be sized appropriately based on the establishment's daily FOG production, typically requiring a minimum of 100 pounds of capacity for standard restaurants. The city mandates that traps be located in accessible areas for inspection and pumping, and must comply with plumbing code standards set by the Illinois Plumbing Code. Regular inspections by health department officials ensure that systems remain operational and properly sized for the facility's operations.

Maintenance Schedule & Pumping Requirements

Chicago regulations require grease traps to be pumped and cleaned when they reach 25% capacity, not simply at fixed intervals. Most restaurants need pumping every 1–3 months depending on usage volume, cooking methods, and trap size. Facilities must maintain detailed records of all pumping and maintenance, including dates, waste volumes removed, and disposal documentation. Licensed grease waste haulers certified by the city must perform the service and provide proof of proper disposal at approved treatment facilities. Failure to maintain these records or allow grease buildup can trigger health code violations and fines ranging from $300 to $2,500 per violation.

Inspection, Enforcement & Health Code Violations

Chicago health inspectors routinely examine grease trap functionality during routine and complaint-based inspections, checking for proper installation, accessible lids, maintenance records, and evidence of recent cleaning. Violations such as clogged or overflowing traps, improper sizing, or lack of maintenance documentation are cited as critical or non-critical deficiencies. Repeated violations can escalate to suspension of food service permits or temporary closure. The city also coordinates with the EPA and wastewater treatment facilities to monitor FOG discharge into municipal sewers; facilities causing blockages may face additional liability and remediation costs.

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