Grease Trap Compliance Guide: What Restaurant Owners Need to Know

Running a restaurant means juggling dozens of responsibilities, and grease trap compliance is one you cannot afford to overlook. Federal, state, and local regulations govern how commercial kitchens manage fats, oils, and grease (FOG). Violations can lead to hefty fines, forced closures, and even lawsuits. This guide walks you through the regulatory landscape so you can protect your business and your bottom line.

The Regulatory Framework: Federal, State, and Local

Grease trap regulations exist at three levels of government, each adding its own layer of requirements. At the federal level, the Environmental Protection Agency (EPA) sets the foundation through the Clean Water Act and its National Pretreatment Program. The EPA requires publicly owned treatment works (POTWs) to enforce pretreatment standards on industrial and commercial dischargers, including restaurants. While the EPA does not dictate exactly what kind of grease trap you need, it establishes the principle that FOG must be controlled before wastewater enters the sewer system.

State environmental agencies take the EPA framework and translate it into specific codes. These may mandate grease trap installation for any food service establishment (FSE), specify minimum trap sizes based on fixture flow rates, and outline licensing requirements for haulers who transport waste grease. Local municipalities then layer on even more specific rules. Your city or county likely has a FOG control program administered by the local water authority. These programs typically specify cleaning frequency, require manifests for each pump-out, and conduct periodic compliance inspections.

EPA Pretreatment Standards You Should Know

The EPA's General Pretreatment Regulations (40 CFR Part 403) prohibit the discharge of pollutants that cause pass-through or interference at the wastewater treatment plant. For restaurants, this primarily means FOG. While the EPA does not set a specific parts-per-million limit on grease at the federal level, many local POTWs set their own discharge limits, commonly 100 mg/L for oil and grease. Exceeding this limit, even inadvertently because your trap was overdue for service, can trigger enforcement action. Your local water authority can impose surcharges on high-strength waste, issue notices of violation, or escalate to consent orders and civil penalties.

Common Violations and Their Consequences

Understanding the most common violations helps you avoid them. Here are the issues inspectors find most frequently:

• Failure to install a grease trap — Any FSE that prepares food is typically required to have one. Operating without a trap is the most serious violation and can result in immediate fines.
• Exceeding the 25% rule — If an inspector measures your trap and finds FOG levels above 25% of the liquid depth, you are in violation in most jurisdictions.
• Missing or incomplete records — You must maintain pump-out manifests, inspection logs, and maintenance records. Gaps in documentation are treated as evidence of non-compliance.
• Improper disposal of waste grease — Grease must be hauled by a licensed transporter to an approved facility. Dumping grease down the drain, into a storm drain, or into a dumpster is illegal.
• Bypassing the trap — Connecting dishwashers or sinks directly to the sewer without routing through the trap circumvents the system and violates code.

Fines vary widely by jurisdiction. First-time violations typically range from $250 to $1,000, but repeat offenders can face penalties of $10,000 or more per day. In cities like Houston and Los Angeles, water authorities have aggressively pursued enforcement in recent years, making compliance more important than ever.

Record-Keeping Requirements

Proper documentation is your best defense during an inspection. Most FOG programs require you to keep the following records on-site for a minimum of three to five years:

• Pump-out manifests — Provided by your grease trap pumping service. Each manifest should list the date, volume removed, hauler name, license number, and disposal facility.
• Inspection logs — Document every self-inspection with the date, FOG thickness measurement, and any corrective actions taken.
• Maintenance and repair records — Note any repairs to the trap itself, replacement of baffles, or upgrades to a larger unit.
• Employee training documentation — Some jurisdictions require proof that kitchen staff have been trained on proper FOG management practices, including dry wiping, oil recycling, and recognizing warning signs.

Tips for Staying Compliant

1. Schedule recurring service — Work with a licensed provider to set up automatic grease trap cleaning at intervals that keep you well within the 25% rule.
2. Train your staff — Educate cooks and dishwashers on best practices: scrape plates into the trash, dry-wipe pans, and never pour oil down the drain.
3. Install drain screens and strainers — Simple, inexpensive devices that catch food solids before they reach the trap.
4. Consider a used cooking oil pickup service — Partnering with a cooking oil recycling provider keeps waste oil out of your drains entirely and may even earn you a small rebate.
5. Keep records organized and accessible — Store manifests and logs in a dedicated binder at the manager's station so they can be produced immediately when an inspector arrives.
6. Know your local code — Contact your municipal water authority or visit their website to download the current FOG ordinance. Rules change, and ignorance is not a defense.

What to Do If You Receive a Violation

If you receive a notice of violation, act quickly. Most jurisdictions provide a cure period (often 30 days) to correct the issue. Immediately schedule a professional cleaning, gather your documentation, and respond in writing to the issuing authority. If the situation is complex, consulting an environmental compliance attorney can be worthwhile. Demonstrating good faith and prompt corrective action significantly reduces the risk of escalated penalties.

Key Takeaways

• Grease trap regulations operate at federal, state, and local levels. Your local FOG program has the most specific rules.
• The EPA's pretreatment standards set the baseline, but your city sets the enforceable limits.
• Common violations include overdue cleaning, missing records, and improper waste disposal.
• Fines range from $250 to $10,000+ per day for repeat offenders.
• Proactive scheduling, staff training, and meticulous record-keeping are your best compliance tools.