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Grease Interceptors

Grease tends to originate from restaurants, food service operations and other institutional food establishments. Improperly managed grease can create problems for sewer systems. 

Grease is present in such items as:

  • Lard
  • Cooking oil
  • Baked goods
  • Shortening
  • Meat fats
  • Dairy products
  • Food scraps
  • Butter
  • Sauces

Why is grease a problem?

Grease causes the formation of solid deposits along sewer walls, reducing capacity and causing blockages. Grease can also accumulate in wet wells, pump stations and screens, causing blockages and equipment failure which often results in expensive repairs.

How to properly dispose of grease

The most effective way is to keep grease out of the sewer system. Some best practices are:

  • Reduce the amount of grease going into the sewer drain by wiping off greasy pots, pans and kitchen utensils
  • Don’t dispose of salad dressings, creams and butter in the drain
  • Clean grease interceptors at regular intervals (recommended when 60 percent capacity is reached)
  • Keep outdoor grease containers and dumpsters covered
  • Don’t use degreasers, emulsifiers and hot water to clean lines. While they break down grease in the facility, the grease can congeal downstream in sewer lines
  • Regular pumping of a grease interceptor is an effective way to keep the interceptor clean