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Fats, Oils and Greases (FOG)


Fats, Oils and Greases (FOG) are one of the most common causes of sewer backups and sanitary sewer overflows. Grease hardens as it cools and clings to the walls of sewer pipes, creating a blockage (similar to a clogged artery). Excessive amounts of FOG that reach the Wastewater Treatment Facility can disrupt regular treatment processes and require extra resources to bring the plant back to its normal operating state.

Garbage disposals do not prevent grease from building up in plumbing, nor do hot water or dish detergents dissolve grease. FOG should never be poured down the sink or flushed down the toilet.

Food Service Establishments or other businesses that use or produce FOG are required by Jerome Municipal Code 13.18.1220 to install and maintain Grease Removal Devices such as grease traps or interceptors.

Sources of FOG include, but are not limited to:

*Meat products

*Dairy products

*Cooking oil

*Butter / Margarine / Shortening / Lard

*Food scraps

*Baked goods



Questions regarding FOG management or any other Pretreatment-related items can be directed to the City of Jerome Pretreatment Coordinator at 208-324-7122 extension 211.