Oregon FOG & Grease Trap Rules
Portland
Portland food-service establishments must maintain grease interceptors and report every cleaning to the Bureau of Environmental Services. Most interceptors must be cleaned when FOG and solids reach 25% full; some high-efficiency hydromechanical units may reach 75%. City staff inspect interceptors and may issue citations. Chemical, enzyme, and bacterial additives violate Portland City Code and Administrative Rule ENB-4.26.
Eugene
Eugene requires grease-removal devices for food-service facilities under the Oregon Plumbing Specialty Code and Eugene City Code. Grease traps may need weekly cleaning and gravity interceptors may need cleaning every three months; frequency depends on capacity, grease generation, pollution-management practices, and blockage history. Keep maintenance, cleaning, removal, and disposal records for at least three years. A City of Eugene plumbing permit is required, and gravity-interceptor waste must be removed by a licensed mobile-waste hauler.
Salem
Salem restaurants may need an environmental survey during building plan review or a pretreatment inspection. Salem Public Works publishes food-service FOG BMP guidance as part of its wastewater pretreatment program.