Fats, Oils & Grease (FOG)

Where does grease come from?

It is produced as 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 the District.
The District’s Fats, Oils & Grease (FOG) program aims to reduce the amount 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.


  • 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.
  • Educate family members and employees 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.