Boston Grease Trap Requirements for Restaurants

Boston Municipal Code & Local Regulations

Boston requires all food service establishments to install and maintain grease interceptors (grease traps) that meet state plumbing code standards. The Boston Building Code references the Massachusetts State Plumbing Code, which mandates sizing grease traps based on peak wastewater flow rates and food preparation volume. Restaurants must have traps large enough to handle their specific operations—typically 40–100 gallons for small establishments and much larger for high-volume kitchens. The Boston Public Health Commission conducts routine inspections during food service license renewals and can issue violations if traps are undersized, clogged, or improperly maintained.

Maintenance Standards & Inspection Requirements

Massachusetts state regulations and Boston municipal enforcement require grease interceptors to be cleaned whenever grease accumulation reaches 25% of tank capacity. Many restaurants schedule professional pump-outs every 1–3 months, depending on kitchen volume and cooking practices. The Boston Health Department inspects trap condition during health inspections; violations for grease-laden pipes, overflow, or inadequate drainage can result in citations under Massachusetts Code Title 105 CMR 590.000. Documentation of maintenance records—including dates, service provider information, and disposal records—demonstrates compliance and is essential during inspections.

Compliance Tips & Best Practices for Boston Restaurants

Establish a preventive maintenance schedule with a licensed waste management contractor who serves Boston; they understand local code requirements and disposal regulations. Train kitchen staff to minimize grease disposal into sink drains by scraping plates, using drain strainers, and avoiding liquid grease pours. Monitor your trap's condition regularly—unusual odors, slow drains, or visible grease buildup are signs that professional cleaning is overdue. Keep detailed maintenance logs and receipts readily available for health inspectors; Massachusetts requires documented evidence of compliance, and poor records can complicate licensing renewals or lead to additional citations.

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