Minneapolis Grease Trap & Interceptor Compliance Checklist

Minneapolis-Specific Grease Trap Requirements

Minneapolis food service establishments must install grease interceptors sized according to Minnesota Rules Chapter 7050 and local plumbing codes, typically based on daily wastewater volume and peak flow rates. The city requires weekly grease trap cleanings for high-volume operations and bi-weekly maintenance for standard restaurants, with documented records provided to health inspectors during routine audits. Interceptors must have a minimum 50% grease removal efficiency and cannot discharge to the municipal sewer system with a grease concentration exceeding 100 mg/L—violations can result in fines starting at $150 and escalating based on severity and repeat offenses.

Monthly Inspection Checklist Items

Inspect the grease trap inlet, outlet, and baffle system for clogs, leaks, or structural damage that could allow grease bypass. Verify the trap's water level is between the minimum and maximum marks (typically 6-12 inches from the top), as improper levels reduce separation efficiency and allow grease into the sewer line. Check that the trap lid is secure and the area around the trap is clean and free of spilled grease, which attracts pests and signals neglect to inspectors. Document the removal date, amount of grease removed (in pounds or gallons), and the name of the licensed hauler handling disposal—the Minneapolis Health Department requires this documentation for compliance verification.

Common Violations & Prevention Strategies

The most frequent grease trap violation in Minneapolis is infrequent cleaning, which leads to solid accumulation and bypass directly into the municipal system, triggering MPCA enforcement and costly remediation. Staff training is essential: ensure kitchen personnel understand that grease, oils, and food scraps must not be poured down drains, and that pre-rinsing dishes into designated containers—rather than the sink—extends interceptor life and reduces cleaning frequency. Partner with a licensed grease hauler certified by the Minnesota Pollution Control Agency, maintain copies of all hauling receipts and manifests for at least three years, and schedule pre-inspection cleanings 1-2 weeks before your routine health department audit to ensure optimal performance during testing.

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