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FOG (Fats, Oils & Grease)

FOG Business Brochure

FOG Flyer

FOG Service Providers List

Plumbing and Drainage Institute external link icon
(includes how to size grease interceptors)

City of Kirkland Municipal Code Section 15.36

Joshua Pantzke
Utility Manager

FOG image

In the kitchen, fats, oils and grease (FOG) comes mostly from pre-rinsing dishes or washing pots and pans. When cooking FOG is allowed to go down the drain, it cools in the wastewater system and sticks to pipes, creating FOG buildup.  The buildup causes clogs and backups in homes and businesses, wastewater overflows, and spills onto private property, streets, and local surface waters.  FOG buildup increases the cost of maintaining Kirkland's wastewater treatment systems and can also create public health problems.

Sources of FOG include:

  • Gravy, sauces and soups
  • Cooking oil, butter, shortening, lard and margarine
  • Milk, cream, sour cream and mayonnaise
  • Food scraps
  • Oil from cooked meats

Tips to keep your drains fat-free:

  • Pour cooled fats, oils and grease into a container and put the container in the trash.   
  • Before washing, use your paper napkin or a paper towel to wipe FOG from dishes and dispose of it in the yard waste cart   
  • Use sink strainers to catch food waste   
  • Put food scraps in yard waste cart   
  • Disconnect and stop use of in-sink garbage disposals which flush food and FOG into sewers

FOG can wreak havoc on wastewater drains and pipes. Fortunately it is also a valuable resource.  You can recycle your used cooking oil by bringing it to a collection tank at the North Kirkland Community Center (12421 103rd Avenue NE).  A local company, General Biodiesel, collects the cooking oil, converts it to biodiesel fuel and distributes it for use in local fleets.


Restaurants and fast food outlets generate a significant amount of fats, oil and grease.  In 2001, the City of Kirkland passed ordinance #3778 to reduce the accumulation of fats, oil and grease in our wastewater system.  The ordinance applies to restaurants and other nonresidential facilities where food is prepared or served and requires them to control FOG with grease traps or interceptors that are cleaned regularly along with other provisions.   (See City of Kirkland Municipal Code Section 15.36 for details.)  The City also implemented an inspection program to ensure compliance with the ordinance.  The inspector confirms systems are clean and functioning properly and provides information to help improve Kitchen Best Management Practices (BMPs).

Public Works
123 5th Avenue, Kirkland WA 98033
T. 425-587-3800 | F. 425-587-3807
Mon-Fri, 8 a.m. to 5 p.m.

Operations & Maintenance
915 8th St, Kirkland WA 98033
T. 425-587-3900 24/7 | F. 425-587-3902
Mon-Fri, 6:30 a.m.-3:30 p.m.

General Inquiries - Contact us via the: 
Our Kirkland Customer Service Portal