Fats Oils and Grease (FOG)



Where does grease come from?

A result of cooking, grease comes from meat fats, lard, oil, shortening, butter, margarine, food scraps, and dairy products.  When washed down the sink, grease sticks to the insides of sewer pipes.  Over time it builds up and can block the pipe. Garbage disposals do not remove grease from the sewers.

What happens when grease gets in the sewer:

  • Raw sewage overflowing in your business or a neighboring home or business.
  • Expensive cleanup that may be charged to you.
  • Raw sewage overflowing to parks, streams and yards.
  • Higher sewer bills from high costs to sewer dept.


   The City of Toledo Fats, Oils & Grease (FOG) program aims to reduce the amont of FOG from entering the sanitary sewers.  FOG accumulation in the sewer lines can cause a Sanitary Sewer Overflow (SSO).  SSO's have the ability to cause damage to your home, business and the environment.  At Environmental Services, we educate, monitor, and, if required, enforce on facilities that are contributing to FOG related issues.


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  • Clean vent hoods and filters regularly.
  • Protect drains with a screen.
  • Prevent spills of fats, oils and grease.
  • Dry scrape leftovers into a trash bin, not the sink.
  • Empty trash bins before they overflow.
  • Clean and cover outdoor recycling area.
  • Keep records of cleaning, inspections and service for at least 3 years.
  • Train staff on Best Management Practices (BMPs) to keep FOG out of sewer pipes.



  • Don’t put degreasers in the system (they just push FOG into sewers).
  • Don’t wash kitchen equipment outdoors.
  • Don’t allow FOG into storm drains, catch basins, etc.
  • Don’t improperly dispose of fats, oils and grease.

FOG Documents