Grease Trap Requirements
Raleigh, NC

FOG Compliance in Raleigh, NC

Food service establishments in Raleigh operate under a combination of federal EPA pretreatment standards, North Carolina state plumbing code, and city-level FOG ordinances. Together these rules determine how grease traps must be sized, how often they must be pumped, and what happens when a restaurant falls out of compliance. The city has approximately 2,636 food service establishments — every one of them subject to the rules summarized below.

Pumping frequency is the compliance rule restaurant owners interact with most often. In Raleigh, the rule is: Minimum every 90 days (quarterly). Must be pumped before FOG and solids accumulate to 25% of interceptor capacity. This aligns with the 90-day US median enforced by most major cities.

Raleigh requires a dedicated FOG permit for any food service establishment generating fats, oils, and grease. The annual permit fee is FOG permit/pretreatment discharge authorization required through City of Raleigh Public Utilities. Contact (919) 996-2334 for current fee schedule.. The permit is separate from, and in addition to, the plumbing permit required at installation. Violations carry maximum penalties of Up to $25,000 per day per violation under North Carolina General Statutes and City of Raleigh Code. Significant fines reflect state-level pretreatment enforcement standards. , in line with typical US municipal penalties. Fines typically escalate with repeat violations, and severe discharges that cause sanitary sewer overflows can trigger federal Clean Water Act penalties layered on top of local fines.

Raleigh enforces the 25 percent rule: grease traps must be pumped before the combined FOG and settled solids reach 25 percent of the trap's total liquid depth. Inspectors measure the depth with a sludge judge or dipstick, typically at surprise visits. Exceeding the threshold at inspection triggers a notice of violation and mandatory emergency pump-out, regardless of the scheduled pumping cycle. Inspections conducted by City of Raleigh Public Utilities, Pretreatment/FOG Compliance section. Risk-based schedule; typically annual for compliant facilities. Establishments with violations subject to increased inspection frequency.. Establishments must maintain pumping logs, hauler manifests, and inspection reports on-site — missing records is itself a violation in most enforcement actions. Enforcement authority rests with the City of Raleigh Public Utilities Department, Pretreatment/Environmental Compliance Division, which handles permit issuance, inspections, and hauler licensing.

For a deeper explanation of the rules this city enforces, read our guides on how grease traps work and the 25/50 pumping rule.